This Can Turn On Your Check Engine Light?
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Date: 2020-08-05
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Comments and reviews: 10
Kevin
The reason they do this is because the heater has a fairly significant impact on the engine temperature, specifically how long it takes to warm up. Cold engines are not clean burning engines, so they want them to warm up fast and if they don't, it needs to turn on the check engine light. The PCM needs to know how quickly it should expect the engine to warm up in varying circumstances, so they need to monitor variables that effect engine temperature, and one of those variables is the heater. So, they need to know if the HVAC is requesting heater operation and how much air is moving past the heater core, so it needs to monitor fan speed. If the PCM can't monitor actual fan speed, it throws off its calculation or model of the coolant temperature in relation to how quickly it should warm up. This is the side effect of (to a lessor degree) people wanting cars that get better MPG and (to a greater degree) governments that want lower tailpipe emissions.
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The reason they do this is because the heater has a fairly significant impact on the engine temperature, specifically how long it takes to warm up. Cold engines are not clean burning engines, so they want them to warm up fast and if they don't, it needs to turn on the check engine light. The PCM needs to know how quickly it should expect the engine to warm up in varying circumstances, so they need to monitor variables that effect engine temperature, and one of those variables is the heater. So, they need to know if the HVAC is requesting heater operation and how much air is moving past the heater core, so it needs to monitor fan speed. If the PCM can't monitor actual fan speed, it throws off its calculation or model of the coolant temperature in relation to how quickly it should warm up. This is the side effect of (to a lessor degree) people wanting cars that get better MPG and (to a greater degree) governments that want lower tailpipe emissions.
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Glen
Eric I found some stats you might find interesting regarding the salt belt. The local news paper for my home state of Rhode Island printed this; According to the US Geological Survey The United states in 1940 used 140, 000 tons of salt on our roads. just over 1, 000, 000 in 1954, 10, 000, 000 in 1985 and we currently exceed 24, 000, 000 tons annually. last year Rhode Island used 44. 2 tons, Massachusetts 34. 6 tons, New York 28. 0 tons, New Hampshire 25. 1 tons and Vermont 23. 3 tons. I find this very interesting considering New York is about 90% larger then all of the New England states combined. Rhode Island is the smallest state and about 45 times smaller then New York. Yet we use 63% more salt then New York, Maybe the MOP has the contract the treat our roads! LOL
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Eric I found some stats you might find interesting regarding the salt belt. The local news paper for my home state of Rhode Island printed this; According to the US Geological Survey The United states in 1940 used 140, 000 tons of salt on our roads. just over 1, 000, 000 in 1954, 10, 000, 000 in 1985 and we currently exceed 24, 000, 000 tons annually. last year Rhode Island used 44. 2 tons, Massachusetts 34. 6 tons, New York 28. 0 tons, New Hampshire 25. 1 tons and Vermont 23. 3 tons. I find this very interesting considering New York is about 90% larger then all of the New England states combined. Rhode Island is the smallest state and about 45 times smaller then New York. Yet we use 63% more salt then New York, Maybe the MOP has the contract the treat our roads! LOL
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andrew
My 2006 Mini Cooper S had the radiator fan resistor go bad. It only operated at high speed. It was diagnosed by the dealer. It was a 600 dollar repair to fix with a whole new radiator fan and support which included the resistor in the shroud part.
I researched online and found the circuit could be altered by putting a resistor in the harness to take over the control of the fan speed.
The resistor was less than 15 dollars and my mechanic soldered into the proper wires and we mounted it on metal using some heat sink goop attached it to the frame type area of the front left side where the harness was right near to the area. That took a half-hour shop time.
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My 2006 Mini Cooper S had the radiator fan resistor go bad. It only operated at high speed. It was diagnosed by the dealer. It was a 600 dollar repair to fix with a whole new radiator fan and support which included the resistor in the shroud part.
I researched online and found the circuit could be altered by putting a resistor in the harness to take over the control of the fan speed.
The resistor was less than 15 dollars and my mechanic soldered into the proper wires and we mounted it on metal using some heat sink goop attached it to the frame type area of the front left side where the harness was right near to the area. That took a half-hour shop time.
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ChallengerDood
I can't understand how anyone ends up buying a dart. If you want a Challenger, sure. They look cool, lots of power, might be worth having a Dodge. You want a Cummins, sure, get a ram. But you want an economy sedan, why get a dart? Doesn't make any sense. Just get a Toyota. Don't deal with this kind of crap.
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I can't understand how anyone ends up buying a dart. If you want a Challenger, sure. They look cool, lots of power, might be worth having a Dodge. You want a Cummins, sure, get a ram. But you want an economy sedan, why get a dart? Doesn't make any sense. Just get a Toyota. Don't deal with this kind of crap.
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William
Hey Mr. O I have a 1996 Nissan Sentra that wont stay running battery drains fairly fast after I jump it Ive replaced the alternator spark plugs and even the battery my fuel pump and started are also fine Im kinda stuck on what to do now if you have any suggestions please let me know
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Hey Mr. O I have a 1996 Nissan Sentra that wont stay running battery drains fairly fast after I jump it Ive replaced the alternator spark plugs and even the battery my fuel pump and started are also fine Im kinda stuck on what to do now if you have any suggestions please let me know
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Russ
Have a 2015 Dart and the blower just quit completely and check engine light on as well. Weird thing is the rear defroster won't kick on either nor will it let me engage/disengage ESC but hazard switch works. So blower motor going completely dead would trigger those problems as well?
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Have a 2015 Dart and the blower just quit completely and check engine light on as well. Weird thing is the rear defroster won't kick on either nor will it let me engage/disengage ESC but hazard switch works. So blower motor going completely dead would trigger those problems as well?
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Mytwistedvoices
Commenting on your Jul 21, 2018 video with the Brembo brakes on the Camero. I have Brembo brakes on my Harley Davidson. The pads on my bike are called Sintered pads. It is more heat and wear tolerant than ceramic. Great Videos!
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Commenting on your Jul 21, 2018 video with the Brembo brakes on the Camero. I have Brembo brakes on my Harley Davidson. The pads on my bike are called Sintered pads. It is more heat and wear tolerant than ceramic. Great Videos!
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Bill
Good to hear from you again. Here's hoping that other shops will be sending you many FUBAR's in the coming year. PS. I had no idea about your dad. I could tell when you spoke of him and your mom that their was love and respect.
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Good to hear from you again. Here's hoping that other shops will be sending you many FUBAR's in the coming year. PS. I had no idea about your dad. I could tell when you spoke of him and your mom that their was love and respect.
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mark
Replacing a oem blower motor would be ok, but with Chrysler/Dodge cheap parts in the first place, I'd go with after market and I haven't had a problem. Keep your costs down for your customers will only benefit your business.
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Replacing a oem blower motor would be ok, but with Chrysler/Dodge cheap parts in the first place, I'd go with after market and I haven't had a problem. Keep your costs down for your customers will only benefit your business.
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Hella
12: 06 calling out Fia, ih, I mean Chrysler lol. Same thing with happened to me with an exhaust manifold on a Malibu. Bought it at the dealer, box said, Made in America but manifold said, Made in China. Lol.
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12: 06 calling out Fia, ih, I mean Chrysler lol. Same thing with happened to me with an exhaust manifold on a Malibu. Bought it at the dealer, box said, Made in America but manifold said, Made in China. Lol.
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