Re: Has anyone else had the code p1421 come up with the check engine light?
Originally Posted by cp.16
The air filter is perfect; I am a mechanic and very anal about a clean well maintained truck. This is random anomaly and was trying to decide if to let it go or tell my dealer.
I didn't read the details in that TSB I posted. Did you read the cause and cure details in it?
Chicago area 05 KC SE 4x2 FFV, smoke, 2.94 gearing. Mods: Hypertech Max Energy, JBA catback, Airaid 4" MXP CAI, Hellwig HD traction springs, 08 rear shackles, Nasta nerf bars, Kenwood KSC-SW1 powered sub. Best full street trim (5120#) 1/4 mile track time of 14.632 running Bully Dog 87+2 and S&B CAI. 1/8 mile email@example.com with a 2.11 60'.