my 2005 f-150 has a check engine light but no codes

Asked by Guru9Q35PW Mar 17, 2022 at 11:20 AM about the 2005 Ford F-150 FX4 4WD

Question type: Maintenance & Repair

my truck has a check engine light and a inop ob2 port and no codes come up
when checking the dcv

1 Answer

157,465

My first suspect would be the PCM (computer).The computer will tell on everything else but not on itself! A very good mechanic once told me that once and I've found it to be true. One example was when I was chasing down a security system problem with my 94 Fleetwood. The Passkey Fault light would come on and sometimes the engine would randomly shut down. After exactly 3 minutes the light would go off and the engine would start and run normally again, until the next time. I didn't have any trouble codes from the computer though, so I replaced the computer. That was 4 years ago and, knock on wood, the car's been fine ever since! Hope that helps! Jim

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