You may have an air or vacuum leak.
When unwanted air gets into the engine, it leans out the mixture air-fuel and the computer responds by sending a signal to enrich the mixture which shuts off the idle bypass circuit.
It could also be a faulty air bypass control motor or plug bypass circuit.
I would plug a scanner to the car and check the PCM even if your MIL is not on. You should check your sensors, make sure they're all working good.
Thursday, August 20th, 2020 AT 11:11 AM