How to Fix a Fuel Cap that Doesn't Seal But Locks & Clicks • Cars Simplified
Sometimes even new fuel caps have problems, like this AC Delco GT291 that locks too early. Steve from Cars Simplified takes a look at this fuel cap on a 2005 Pontiac GTO and shows you what to look for on your own fuel cap. A loose/leaking fuel cap can cause some of the following trouble codes:
P0442: Evaporative Emission Control System Leak Detected (Small Leak)
P0455 Generic: Evaporative Emission Control System Leak Detected (No Purge Flow/Large Leak
P0455 Chrysler: EVAP Large Leak Detected Conditions
P0455 Ford: EVAP System Leak (No Purge Flow/Large Leak) Conditions
P0455 GM: EVAP System Leak Detected Conditions
P0455 Nissan: Evaporative emission (EVAP) canister purge system - Gross Leak
P0457: Evaporative Emission Control System (EVAP) Leak Detected
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