What does the p0456 code on the engine mean?
What does the p0456 code on the engine mean? What the P0456 code means. P0456 is an OBD-II generic code that the engine control module (ECM) has detected a very small leak in the evaporative system during the vehicle off testing. The test has to fail twice in a row to cause the code to be activated by the ECM. What does p0446 mean on a fuel pump? Scan your vehicle to verify P0446 is the only code present. If other codes are present regarding fuel pressure or the fuel system, repair and diagnose those first. If it is paired...