Questions & Answers for: po 455

po 455 error That is an leak in the emissions system - largest cause is faulty gas cap. Other possible problems: vaccum leak in the EVAP system in or around the canister. faulty pressure sensor on the

CODE PO455 CHECK ENGIN LIGHT CAME ON,DID DIAGNOSTICS CODE PO 455 CAME UP. evap leak....... small could by a gas cap or the evap pump

...PO 455 and PO 0440 came back what does this mean? PO 455- Evaporative emission control System leak detected (check exhaust system, egr valve, or entire intake and exhaust system) PO440- Evaporative ...

or it has failed The PO code PO 455 is normally caused bu a gas cap not being tightend, the other causes is a canister purgr vale malfunction or a leaking hose on the fuel tamk or purge canister valve

code po 455 and code po 307 P0455: EVAP- no purge flow or large leak. Check for leaks in the evaporative purge system. P0307: #7 cylinder misfire. Check spark plug and wire.

PO 455 and PO 128 codes. What is wrong with my truck? P0455 is indicating a leak in the Evaporative Emissions system, a common reason for this is a loose gas cap. P0128 is indicating that the engine ...

...PO-455 EVAP SYSTEM (GROSS LEAK) PO --301 Cylinder #1 Misfire Two separate problems to work on. You will need help on those at a repair shop Do not let them do anything but diagnose & repair those ...

p o 455 CODE LOST GAS CAP SON BROUGHT A NEW ONE PO 455 -- is a Gross Evap System Leak A gas cap is a small leak Need a repair shop to diagnose

...with Hummer cap and need to clear the PO 455 code. You would need a scanner or code reader to erase the code. Keep in mind code 455 is for a large leak so it could be something other than the gas

...po 496 po 455 po442 and po121 po121 is throttle position sensor is out of range.po442 is emissions system leak detected small leak.po455 is same as po442 but large leak.po496 is high purge flow . ...