How to diagnose a p0455 engine code?
How to diagnose a p0455 engine code? Replace FTP sensor as per TSB 04-06-04-025A. A customer rolls in with a check engine light. You scan a P0455, an engine code that indicates a large evaporative emissions (EVAP) leak. Your first move: check the gas gap. So you tighten the cap, delete the code and send the customer on his way. A few days later, the light is back on. What to do if you have gas code p0441? If you have code P0441, P0440, or code P0456, the cause of the codes is most likely a solenoid failure, or a...