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Jeep Wrangler JK
JK General Discussion
Fake overheating
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<blockquote data-quote="Duster" data-source="post: 454485" data-attributes="member: 20812"><p>The point is to localize the problem and there are several points where "overheating" could show up. There could be genuine overheating due to a failed thermostat, pump, or radiator. If that is true, then your infrared scan should see the engine temperature within operating range after it has warmed up, and continues heating beyond where should stabilize. This a problem with the cooling system. You should be seeing a check engine light coming on, and if you have an OBDII scanner, there should be a code thrown: specifically "P0217." </p><p></p><p>You say, "The only time I get any codes is when gauge is saying it’s hot but it’s not." If the sensor is haywire, it will be telling both the ECM and the gauge in the cab that the egine has over heated. That will cause that code to be thrown, whether the engine is too hot or not. So, if the engine is not over heated, but the gauge and ECM are saying it is, you may need a new sensor - even if it has been recently replaced. You should double check the connections first. If you have the old wires try swapping them out. If that changes things, maybe it's the wires. If it doesn't, then replace the sensor.</p></blockquote><p></p>
[QUOTE="Duster, post: 454485, member: 20812"] The point is to localize the problem and there are several points where "overheating" could show up. There could be genuine overheating due to a failed thermostat, pump, or radiator. If that is true, then your infrared scan should see the engine temperature within operating range after it has warmed up, and continues heating beyond where should stabilize. This a problem with the cooling system. You should be seeing a check engine light coming on, and if you have an OBDII scanner, there should be a code thrown: specifically "P0217." You say, "The only time I get any codes is when gauge is saying it’s hot but it’s not." If the sensor is haywire, it will be telling both the ECM and the gauge in the cab that the egine has over heated. That will cause that code to be thrown, whether the engine is too hot or not. So, if the engine is not over heated, but the gauge and ECM are saying it is, you may need a new sensor - even if it has been recently replaced. You should double check the connections first. If you have the old wires try swapping them out. If that changes things, maybe it's the wires. If it doesn't, then replace the sensor. [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Fake overheating
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