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i have a nissan sentra gxe 2001 and i want to know what is the problem with the check engine light? the code is p1140 i tock it to auto zone and they told me it was itake valve timing control position sensor? i put it on and the light doesnt turn off. i want to know what do i need to do?i have a nissan sentra gxe 2001 and i want to know what is the problem with the check engine light? the code is p1140 i tock it to auto zone and they told me it was itake valve timing control position sensor? i put it on and the light doesnt turn off. i want to know what do i need to do?
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run the fault codes
indicates a problem ambient temp sensor or a Baro sensor that is not report correctly to the ECM so the correct cold start air/fuel mixture is not being set
Sounds like either it has a bad valve, or worn rings. With the mileage, I would suspect it's just plain getting worn out, when the engine warms up it internal tolerances are better then cold.
Possibly the intake air temperature sensor or the engine coolant temp sensor are stuck at full hot. The computer will schedule too little fuel--especially with the engine cold and you'll have very little power until the engine actually gets closer in temp to the stuck sensor. The engine coolant temp sensor sends signals to the computer NOT to your temperature gauge on the instrument panel. That is a different sender. So your coolant temp gauge on the instrument panel may show normal.
You are right, if the
timing chain were bad it would have the problem all the time , not just cold . This to me sounds like a coolant temp sensor . Hooking up a scan tool that can view engine sensor data , i would check the sensor parameters . most noteably the coolant temp an IAT - intake air temp. after sitting over night these should be very close.
Reading Performance Information Data PID Car OBD Diagnostics ECU Chip...
i have a nissan sentra gxe 2001 and i want to know what is the problem with the check engine light? the code is p1140 i tock it to auto zone and they told me it was itake valve timing control position sensor? i put it on and the light doesnt turn off. i want to know what do i need to do?
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