Intake heater light

813 posts · Joined 2007. #1 · Nov 18, 2009. Started the truck yesterday and check engine light came on. Checked codes with Smarty and there were two of them. They were P2609- No voltage drop seen from intake air heater and P0542- High voltage on the #1intake air heater relay. After checking the codes I noticed that my grid heater is not ...

Intake heater light. Dieseler said: Needs to be colder out for the light to come on. 8 deg celcius is not cold when it gets down to freezing out will it come on. The manual says the glow heater comes on at 5c but when your testing the glow plug indicator light it should come on for between 15-19.5 seconds when you turn the ignition to G.

P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .

Mar 5, 2009 · 2004 FREIGHTLINER INTAKE HEATER LIGHT ON ALL THE TIME WHEN VEHICLE IS ON/RUNNING. Answered in 2 hours by: Technician: Diesel Pro. Diesel Pro. Category: Heavy Equipment. Satisfied Customers: 94. Experience: 12yrs exp with CAT/Cummins/Dietroit Diesel/EMD engines.Computer Diagnosis Business.ASE Certified. Verified. Hello Chris, My 2019 freightliner has a intake heater light that keeps flashing when I hit a bump going down the road or when I accelerate. Mechanic's Assistant: What is the complete model …Heater feed posts to neg. batt. or engine grnd. show 0.9 ohm. with heater feed cables disconnected. With WTS light on, voltage at heater terminal is 10.6V, then goes to 0 after WTS light goes out. With WTS light out, engine running at idle, voltage to heater feed terminals do not return to 10.6V, or any other positive voltage, After 1 min..Sep 6, 2020 ... 3rd Gen Engine and Drivetrain -> 2003-2007 - Grid Heater Light Comes on While Driving / Gongs plus White Smoke - On this latest trip, ...L. Lukek0680 Discussion starter. 2 posts · Joined 2019. #1 · Jan 1, 2019. My check engine light came on with a code of P0542 Air intake heater- high circuit. What would be the most probable cause for this code? Any help would be greatly appreciated.Freightliner Intake Heater Light: Troubleshooting Q&A | JustAnswer. Ask an Expert. Car Questions. Heavy Equipment Repair. 2004 FREIGHTLINER INTAKE …Your vehicle’s computer/powertrain control module (PCM) will store the P2609 code if it detects that either the intake air heater or its wiring has malfunctioned. Common causes of the P2609 code are a bad intake air heater, faulty intake air heater wiring, and PCM failure. The symptoms of a P2609 code are check engine light illumination and ...I was also wondering if a person could use the intake air heater relay for the GP relay. My thinking is that the intake air heater relay would last longer than the GP relay. 2002, F-250, 4X4, CC, SB, 116,000miles, 6sp any help and information will be greatly appretiated. 2002 CC 4X4 SB 6sp TS 6 pos. chip triple pillar guage 5"exhuast Tymar ...

TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater.MeBucko. 687 posts · Joined 2016. #8 · Mar 17, 2018. The only way I have seen searching the internbet on removing the CEL (code) is by using a EFI live tuner, as it allows you to fool the ECM by setting the input voltage for the intake heater to 0. No other tuner seems to be able to do this.L. Lukek0680 Discussion starter. 2 posts · Joined 2019. #1 · Jan 1, 2019. My check engine light came on with a code of P0542 Air intake heater- high circuit. What would be the most probable cause for this code? Any help would be greatly appreciated.Water Heater Flashing Blue Light 3/7/8 Times Meaning. Blue Light Flashing 3 Times – This indicates an open draft pressure switch that could be caused by a bad switch, blocked exhaust vent, or a weak fan. Blue Light Flashing 7 Times – Seven flashes means ther is a fault on a flammable vapor sensor.The intake heater grid light on the dash came on and it dos not go out. 2007 ram 2500 slt. I check the wire from the - Answered by a verified Dodge Mechanic. We use cookies to give you the best possible experience on our website. ... Intake heater isn't getting warm when the key is on.

469 posts · Joined 2009. #11 · Oct 25, 2009. Unplugged the maf sensor, removed the box, enlarged the holes on the side and opened a triangular one in the front. Just like the info on Kennedy diesel page. Holes are below the filter. Reinstalled the air box an filter.Mar 21, 2015 · 192 posts · Joined 2009. #7 · Mar 22, 2015. I did heater delete and mega-flow s3 about 2 weeks ago. Was a little disappointed not to see a bump in mpg's, but at least its soot free now. Glad I did it. 08 2500 6.7 auto grey, 5" TBE, mega flow s-3 intake, throttle valve deleted, erg,cooler,ccv and grid heater deleted. Shop Lifesmart 6-Element Infrared Heater with Front Intake Vent and UV Light Black at Best Buy. Find low everyday prices and buy online for delivery or in-store pick-up. Price …Jan 12, 2016 ... In this video I will be showing you how to delete the intake heater on the LB7 Duramax the reason we are removing this is because of the ...Infrared Heaters. Internet # 328753647. Model # HT1153UV. ... 1500-Watt 3 Element Slim-Line Electric Infrared Space Heater with Front Air Intake and UV Light.

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Lifesmart - 6-Element Infrared Heater with Front Intake Vent and UV Light does its work. I had lot of health issues due to dryness in my study primarily due to heating through the HVAC. This changed when I bought Lifesmart - 6-Element Infrared HeaterI replaced our 250a fuse once cleared codes and came back. Researched and realized the intake transformer / solenoid for the heater was faulty. A $39 part from Freightliner fixed. Cleared codes and all good. Both are located looking down bath hatch on passenger side left of valve cover. Verify wiring in intake alsoNow intake heater light on dash doesnt come on for 20 secods like it use to. I am pretty sure i blow the relays. How do i test if the relay is bad? 03 CTD HO QCLB, 5 spd man, Smarty, air dog lift pump, new CP3 and injectors, aem brute force intake, cfm&intake horn, adjustable boost elbow, 4"MBRP SP, leveled w/ 315/70/17 MTZ'S, and …Nov 12, 2009 · samdweezel05. 1518 posts · Joined 2008. #2 · Nov 12, 2009. If the intake air heater is not working you will get a code. Take the nut off the wire (8 or 10 MM socket) and remove it, and start the truck. The check engine light will come on. If you can read the code it will tell you the intake air heater voltage is low. Sep 16, 2016 ... O ya, I still need to check codes, but the light didn't set as its been blocked or what not through efi. 06 GMC SLT CC SB LBZ, Studded, DP ...DTC P0541 stands for “Intake Air Heater “A” Circuit Low,” and it’s logged when the PCM detects a problem with your vehicle’s intake air heater. Bad intake air heaters and relays, a faulty PCM, and wiring problems are some of the issues that could trigger the code. Common indicators of code P0541 include a lit check engine light, a ...

Intake heater SES light Jump to Latest Follow 4K views 6 replies 5 participants last post by meyer7.3l Apr 9, 2015I was just thinking that a light bulb would make a good simulator for the intake heater circuit. It would show the continuity to ground when ...Different JD models engage the heater in different ways. The manual for yours says to push in the key. I-Cold Start Indicator Light: Indicates that the ignition key is being pressed in and that the air manifold heater is on and heating the intake air to the cylinders, allowing faster starting in cold weather. Mar 19, 2010 / air intake heater #5.May 23, 2013 ... I always try to fuel up first thing in the morning, and I add fuel slowly to maximize my fuel intake. (I drive by the gas station twice ...1425 posts · Joined 2012. #1 · Dec 8, 2012. So I'm going to be deleting my intake air heater, and I'm not sure what to change. Under the engine calibrations and the intake heater section, there is a: intake heater timer (IAT), intake heater timer (ECT), intake heater timer (Baro), intake heater key-on disable and intake heater time allowed.Mar 2, 2018 · Intake Grid Heater Light Comes On Jump to Latest Follow 2K views 11 replies 8 participants last post by Rogerram3500 Nov 28, 2020 Three conditions must exist before the inlet air heater will operate in the pre-heat cycle: 1. The ignition switch must be in the "RUN" position. 2. The coolant temperature is below the lower limit of the temperature switch. 3. The inlet air heater has not timed out for thirty seconds in the pre-heat cycle.This video is to help with troubleshooting your heater when the tune up videos didn't fix the problem.Common causes of the P2609 code are a bad intake air heater, faulty intake air heater wiring, and PCM failure. The symptoms of a P2609 code are check engine light …

This video walks you through the process of my diagnosis of the intake air heater circuit on my LB7 duramax. I also included the wiring diagram for your diag...

The intake air heater (IAH) is located in the air inlet tube and is used to warm the incoming air to aid in starting the engine and for proper cylinder combustion. The glow plug control module (GPCM) will command the IAH on when the engine coolant temperature is below 140F. 05 Chevy 2500 CCSB.808 Posts. Posted - 05/30/2017 : 10:18:04 AM. I have a DT466 that we got back from the dealer . They had to do some work on the engine we installed . There were wiring issues . When we got it back the wait to start light would come on for 5 or 6 seconds and go off . A couple days later went to start the bus the wait to start light wouldn't come ...DTC P0541 stands for “Intake Air Heater “A” Circuit Low,” and it’s logged when the PCM detects a problem with your vehicle’s intake air heater. Bad intake air heaters and relays, a faulty PCM, and wiring problems are some of the issues that could trigger the code. Common indicators of code P0541 include a lit check engine light, a ...Lifesmart - 6-Element Infrared Heater with Front Intake Vent and UV Light - Black. Model: HT1269UV | SKU: 6520643. User rating, 3 out of 5 stars with 8 reviews. 3.0 (8 Reviews) Highly rated by customers for: Dryness, Health issues, Lifesmart. $94.99 Your price for this item is $94.99. Save $5. Was $99.99.192 posts · Joined 2009. #7 · Mar 22, 2015. I did heater delete and mega-flow s3 about 2 weeks ago. Was a little disappointed not to see a bump in mpg's, but at least its soot free now. Glad I did it. 08 2500 6.7 auto grey, 5" TBE, mega flow s-3 intake, throttle valve deleted, erg,cooler,ccv and grid heater deleted.When it comes to starting your day on the right foot, breakfast is key. It provides you with the energy and nutrients needed to kickstart your metabolism and keep you fueled throug...Pulled the power lead from the heater and reset power loop with ~12V showing for the circuit to the heater without heater in the loop. So, it seems the heater itself is toasted out. Next i will attempt to test the heater, any suggestion other than be careful if it works it will get hot. Jun 1, 2018 / Testing the intake manifold heater timer #10.Details. Product Information. Warranty: Limited Lifetime Warranty. Unit of Measure: Each. UPC: # 727943290588. Terminal Type: Screw. Terminal Gender: Male. Voltage (V): 12 …The intake heater light flashes when the bus is cold however once it warms up, it doesn't come back on until the engine - Answered by a verified TechnicianMay 5, 2015 · 18 posts · Joined 2009. #3 · Oct 9, 2015. I know you have EFI Live, but for those who don't, I used a load resistor to make sure my CEL didn't come on. I deleted mine and two days later, I had a Check engine light. It was for the air intake heater, so I erased the code, installed a load resistor and yet have the CEL come back on.

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1425 posts · Joined 2012. #1 · Dec 8, 2012. So I'm going to be deleting my intake air heater, and I'm not sure what to change. Under the engine calibrations and the intake heater section, there is a: intake heater timer (IAT), intake heater timer (ECT), intake heater timer (Baro), intake heater key-on disable and intake heater time allowed.OBD II fault code P0542 is defined as “Intake Air Heater "A" Circuit High”, and is set when the PCM (Powertrain Control Module) detects a high input voltage from, or in the intake air heater circuit. Variations in the input circuit voltage that fall outside of a predetermined range will set a trouble code, and may trigger a warning light.Test the High-Pressure Relief - This is fairly simple with an advanced scan tool. Just command the regulator up to achieve max fuel pressure. This should be somewhere around 27,500 psi. The relief valve is a calibrated mechanical spring that opens to return fuel back to the fuel filter, thus limiting max fuel pressure.Specific conditions must be present before the heater is activated: ". • ambient temperature must be below 0 deg C (32 deg F) • engine oil temperature must be below 55 deg C (131 deg F) • vehicle power must be between 11.8 and 15 volts. • parking brake must be applied on manual transmission vehicles.76 posts · Joined 2011. #1 · Jul 30, 2011. I was driving today and the wait to start/glow plug light started flashing along with chimes. Now it's on permanently. Anyone know why that is. All other gauges read ok. No check engine light and truck starts and shuts down as normal. Any help would be appreciated.Sep 27, 2012 · Thanks, 60vette. Purpose is to warm air going from the intake manifold into the engine during starting. It is on when the "Wait To Start" light on your dash is on. Cummins uses it instead of glow plugs. The colder the ambient temperature, the less willing your engine will be to start. Aug 19, 2020 · On older trucks the grid heaters are separate units and can be replaced fairly easily with spacers if you really wanted to, but on a 97 the grid heaters are built into the intake cover. It is absolutely not worth the effort to fully delete them, just disconnect them. 1997 2500 CCLB, NV4500, 3.54s. 389k on the clock. Nov 13, 2014 · 620 posts · Joined 2009. #7 · Nov 13, 2014. The check engine light is probably on because you unplugged the sensors on the intake when you removed it. The remote start is disabled any time the check engine light is on. The cycling is normal I think until the truck warms up. Got a grid heater delete and i have a code stored in the ECM but no check engine light. 2002 Dodge Ram 2500 Sport - Stock with Edge CTS, Fass, and BD enhanced 47RE with triple disc converter. Most likely due to the ECM cycling the grid while the engine is running, and expecting to see a large draw across the battery.Apr 11, 2011 · First, the heater should come on every time the key is turned to the on position. Then the Engine ECM checks the coolant and intake air temp and if they are high enough, the heater shuts off. Second, the 12volt power that operates the circuit comes from the truck, not the ECM. The most common reason for the heater not to work is a loss of power ... ….

Sep 19, 2014 · 77 posts · Joined 2013. #1 · Sep 19, 2014. Deleted my grid heater a couple months ago with a GDP delete plate, now that it is a little colder in the mornings I am getting a check engine light due to it. I searched and couldn't find a thread that solves this without putting a throttle valve grid heater in. Does anyone know how to solve this ... Amazon.com: Portable car Heater That Plugs Into Cigarette Lighter 12V Car Heater Defroster 150W 30 Seconds Fast Heating for Winter, Upgraded Car Vehicle …813 posts · Joined 2007. #1 · Nov 18, 2009. Started the truck yesterday and check engine light came on. Checked codes with Smarty and there were two of them. They were P2609- No voltage drop seen from intake air heater and P0542- High voltage on the #1intake air heater relay. After checking the codes I noticed that my grid heater is not ...Purpose is to warm air going from the intake manifold into the engine during starting. It is on when the "Wait To Start" light on your dash is on. Cummins uses it …P0542 is a diagnostic trouble code (DTC) for "Intake Air Heater "A" Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .2002 GMC Sierra 3500 w/LB7, service engine light has been on since I bought it 2 months ago. Codes indicate it's the Intake Air Heater Circuit. I took this to mean the heater itself needed changed, so I did. Light stayed on. So . . . I disconnect both pos. on battery for 30-40 minutes and when reconnected, light stayed on.Air Intake Heater Info. Hey guys, porting over here from CumminsForum for some info. I own a small performance parts business for 6.7L Cummins and I have customers looking to alter/relocate the factory grid heater on their motors because of how restrictive it is. I've seen on the 6.0L motor that Ford uses a kind of a plug style air intake ...Oct 22, 2009 · 469 posts · Joined 2009. #11 · Oct 25, 2009. Unplugged the maf sensor, removed the box, enlarged the holes on the side and opened a triangular one in the front. Just like the info on Kennedy diesel page. Holes are below the filter. Reinstalled the air box an filter. Intake heater light, Modern space saving design and innovative front air intake with UV light allows this heater to be placed directly against the wall without constricted air flow or overheating. UV LED light helps kill germs and viruses brought into the heater and returns clean air into the room. The smart boost technology reaches the maximum heat level up to 50% ..., Jan 20, 2007 · Dieseler said: Needs to be colder out for the light to come on. 8 deg celcius is not cold when it gets down to freezing out will it come on. The manual says the glow heater comes on at 5c but when your testing the glow plug indicator light it should come on for between 15-19.5 seconds when you turn the ignition to G. , Purpose is to warm air going from the intake manifold into the engine during starting. It is on when the "Wait To Start" light on your dash is on. Cummins uses it …, Features. The Lifesmart Infrared Fireplace Heater brings the warmth and beauty of a fireplace anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees., Immerse the IAT sensor in a cup of ice water (below 66F ambient temp for 05 truck) should trigger the grid heater operation. If not then the relay doesn't get the 12V trigger signal from ECM for some reasons or the relay ground is missing. _________________. '05 2500 QC SLT SB 4X4 48RE Smarty Jr 205k miles., Got a grid heater delete and i have a code stored in the ECM but no check engine light. 2002 Dodge Ram 2500 Sport - Stock with Edge CTS, Fass, and BD enhanced 47RE with triple disc converter. Most likely due to the ECM cycling the grid while the engine is running, and expecting to see a large draw across the battery., Look for one or two RED wires running to the area of the intake hose or where the intake pipe meets the manifold. Each large (6ga) RED wire represents one heater element. None have GPs. 2) The ECT sensor is mounted to the A/C bracket. Follow the FRONT LOWER A/C mounting bolt down and it's right under the bracket ear., 5.9 cummins grid heater relay replacement and new wire, Your vehicle’s computer/powertrain control module (PCM) will store the P2609 code if it detects that either the intake air heater or its wiring has malfunctioned. Common causes of the P2609 code are a bad intake air heater, faulty intake air heater wiring, and PCM failure. The symptoms of a P2609 code are check engine light illumination and ..., Thanks for the information.Since the yellow check engine light comes on, this indicates the engine ECM is receiving power and functioning. There are several things that can cause a crank no start on this engine.The first is a low or no fuel pressure condition. The engine needs at least 25 psi to start. If it is low, the injectors will not get ..., 1425 posts · Joined 2012. #1 · Dec 8, 2012. So I'm going to be deleting my intake air heater, and I'm not sure what to change. Under the engine calibrations and the intake heater section, there is a: intake heater timer (IAT), intake heater timer (ECT), intake heater timer (Baro), intake heater key-on disable and intake heater time allowed., P2609 code definition. A P2609 trouble code indicates that the PCM has detected abnormal voltage readings from one or more of the intake air heater circuits. This particular trouble …, I was also wondering if a person could use the intake air heater relay for the GP relay. My thinking is that the intake air heater relay would last longer than the GP relay. 2002, F-250, 4X4, CC, SB, 116,000miles, 6sp any help and information will be greatly appretiated. 2002 CC 4X4 SB 6sp TS 6 pos. chip triple pillar guage 5"exhuast Tymar ..., Product details. The New Lifesmart Infrared Heater brings the warmth and reliable heating anywhere in your home without needing to be installed. Using 6 quartz infrared elements to produce comfort and heat. Perfect for heating rooms in your home with its 3 heat settings 1000 watt/1500 watt and an ECO mode that maintains a constant 68 degrees., 808 Posts. Posted - 05/30/2017 : 10:18:04 AM. I have a DT466 that we got back from the dealer . They had to do some work on the engine we installed . There were wiring issues . When we got it back the wait to start light would come on for 5 or 6 seconds and go off . A couple days later went to start the bus the wait to start light wouldn't come ..., 34 posts · Joined 2009. #1 · Dec 21, 2009. I just bought a 2006 GMC K3500 with the LBZ and 114000 miles on it .I have put about a 1000 miles on it and now have a engine light with code P0540 Intake Air (IA) Heater Feedback Circuit.I did a vin check and found out they replaced the glow plug controller right before I bought it ,does the glow ..., CODES: Fault Code: 2555. PID (P), SID (S): S070. SPN: 729. FMI: 3. Lamp: Amber. REASON: Intake Air Heater 1 Circuit - Voltage Above Normal or Shorted to High Source. High voltage detected at the intake air heater signal circuit. EFFECT: The intake air heaters may be ON or OFF all the time., The intake heater light flashes when the bus is cold however once it warms up, it doesn't come back on until the engine - Answered by a verified Technician, What causes the P2605 code? The most common reason for a P2605 code to be stored is that your intake heater relay has become faulty. Other causes include: Open or shorted …, SLIMLINE INFRARED HEATER – FRONT AIR INTAKE VENT UV LIGHT. MSRP $119. MODEL #HT1154UV. PRODUCT SPECS. Powerful Heating: two quartz infrared heating elements and one smart boost heating elements for faster heat up. 3 heat settings: 1,000w /. 1,500w / and ECO-maintains. a constant 68º., 808 Posts. Posted - 05/30/2017 : 10:18:04 AM. I have a DT466 that we got back from the dealer . They had to do some work on the engine we installed . There were wiring issues . When we got it back the wait to start light would come on for 5 or 6 seconds and go off . A couple days later went to start the bus the wait to start light wouldn't come ..., P2605 is a diagnostic trouble code (DTC) for "Intake Air Heater A Circuit". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 . , Aug 21, 2018 · The intake heater grid light on the dash came on and it dos. the intake heater grid light on the dash came on and it dos not go out. Chris (aka-Moose) Technician. 3,024 satisfied customers. Glow plug light stays on. The glow plug light. 2006 2500. I was driving. It started ringing and the light came on. , I wanted to know if there was a constant voltage delivered to the ECM Leads at the intake heater relay? With the key in the on position, I have 12 volts showing at both of the intake heater really positive terminals. Once the Wait to start light goes out, there is a voltage of 3.55V maintained until several seconds after the key is turned off., Infrared Heaters. Internet # 328753647. Model # HT1153UV. ... 1500-Watt 3 Element Slim-Line Electric Infrared Space Heater with Front Air Intake and UV Light., Generac Switch Nc Intake Heater 10000008988. Rating * Name Email * Review Subject * Comments * Recommended. Quick view Details. Generac Power Systems | sku: Generac, 6638. Generac 25 Degree Green 3.5 Quick Disconnect Spray Tip 6638. $8.35. Add to Cart. Quick view Details. Generac Power Systems ..., Pulled the power lead from the heater and reset power loop with ~12V showing for the circuit to the heater without heater in the loop. So, it seems the heater itself is toasted out. Next i will attempt to test the heater, any suggestion other than be careful if it works it will get hot. Jun 1, 2018 / Testing the intake manifold heater timer #10., TWR. 1940 posts · Joined 2011. #3 · Jan 19, 2016. check the intake manifold air temperature sensor this sensor tells the ECM when to turn the grid heater on by what temp the intake is as i recall anything under 66 degrees it does not turn the heater on anything below 66 at start it turns it on the grid heater., at least three square inches of combustion air-intake area and exhaust outlet area for every 1000 BTUs per hour of heater input ... source of the leak before attempting to light any appliance. C.ays operate the heater with the LP-Gas cylinder in an Alw upright position on a level non-combustible surface., Well the intake heater is a grid in the intake manifold. There is a solenoid mounted near the top of the intake manifold. Check those connections and the connection at the grid. You will have power at one of the main bigger studs all the time on it. The abs you will need to get it connected to a scanner or the toolbox program to get the faults., Left amusement park the other day, driving normally, grid heater light came on. Has stayed on, researched this forum and others, found it could be anywhere from Air Intake Temp Sensor, to injectors. Wrote down the codes everyone that was having the problems had, and took a trip to Oreilly's, here is the codes I have (They don't match any …, I wanted to know if there was a constant voltage delivered to the ECM Leads at the intake heater relay? With the key in the on position, I have 12 volts showing at both of the intake heater really positive terminals. Once the Wait to start light goes out, there is a voltage of 3.55V maintained until several seconds after the key is turned off., P0542 is a diagnostic trouble code (DTC) for "Intake Air Heater "A" Circuit High". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $154.99 .