P0171 Chevrolet -

Question

My temperature gauge read hot but car not hot and check engine light on.code p0171 i have put two new o2senior,intake gasket.tempet,clean mas airflow.

Answer 1

Hi there,

It sounds like there is an issue with the coolant temp sensor if the car is not running hot. As for the P0171 code. This could still be the mass air flow sensor causing it, or low fuel pressure. Any exhaust leak on bank 1 could also cause the sensor to see it as a lean condition. Check the catalytic converter as well. If there is back pressure and the exhaust is coming back into the engine it will produce a lean condition.