This is the “fine” description of the trouble code and for example, P0420 means there is an issue at Bank 1, while the code P0421 means the issue is at bank 2. While the engine codes are quite logical, it’s very difficult to remember all of these OBD codes. I’ve created a ...
:shock: For the past few months I've been getting a "large vacuum leak" trouble code (P0455). I keep resetting it and have replaced the gas cap with no avail. Where should I be looking for common vacuum leaks. Thanks for your imput... 06 Chevy Impala P0011, P0121, P0449, P0455...
Trouble Code P0121...Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem Trouble Code P0122...Throttle/Pedal Position Sensor/Switch A Circuit Low Input Trouble Code P0123...Throttle/Pedal Position Sensor/Switch A Circuit High Input Trouble Code P0124...Throttle/Pedal Position...