What does p0442 stand for in Chevy Impala?
What does p0442 stand for in Chevy Impala? Chevy Impala P0442 Code Defined. P0442 is an OBDII trouble code. The code technically stands for: Evaporative Emission System Leak Detected. The EVAP system captures all fuel vapor from the fuel tank and sends them to the engine’s intake in order to be ignited in the normal combustion process. What does the p0440 code on a Chevrolet mean? P0440 CHEVROLET Tech Notes. The P0440 code means that the control module has detected a leak in the Evaporative Emission (EVAP). Loose fuel tank filler cap is the most common cause that triggers the...