PO121 Chevy Silverado. I have already changed throttle position sensor and cleaned everything, now idles at 3000,and Mechanic's Assistant chat Customer: I'm dealing with a PO121 code on …

Customer: re-occurring code po121 on a chevy pick up 5.3 engine Not sure if I should change the throttle body or the electronic pedal Mechanic's Assistant: Thanks. Can you give me any more …

PO121 Chevy Silverado. It’s been on going. Not sure exactly. I’ve replaced the purge valve,fuel solenoid canister,tpps.

I have 2007 chevy Silverado 1500LS First I have a code PO121 so I clean the throttle body when I start it the idle is Mechanic's Assistant chat Customer: I have a 2007 Chevy Silverado 1500 …

P0300 multiple random misfire code. I'm not sure how to find ... Chevrolet Tahoe: 2007 Chev Tahoe - Code P0121 - check engine ... P0056, P0121, and P0449 all on, 2007 Chevy …

2006 Chevy Cobalt Supercharged: Diagnosing P2229, P0121, P0068 Codes Cobalt often faces throttle body sensor errors and intake air system issues causing drivability problems.

I had a TPS code p0121 on my 2007 Chevy Tahoe. I cleaned the throttle body on the vehicle and the code went away and

Customer: po121 code, changed throttle pedal and cleaned throttle body checked maf . now idle screwed up too high , what is the idle relearn procedure for this?

Customer: 2008 chevy silverado failed emissions code po121 Answered by Ron Z. in 6 mins 11 years ago

What does the code po121 mean for a 97 Chevy cavalier, P0121, My husband is and yes he has reset it and keeps coming - Answered by a verified Chevy Mechanic