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 …

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.

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

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?

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

2008 Chevy Silverado P0121 Code: Throttle Position Sensor Issue Silverado models often face throttle sensor faults and rough idle related to P0121 code. The P0121 code indicates a …

My 2003 Chevy Tracker has a P0031 diagnostic code. What is it telling me?