P0121 Chevy Tahoe, The P0121 code indicates that your powertrain control module (PCM) has detected that your throttle position sensor is operating outside of a programmed range. The P0121 code for Chevrolet vehicles indicates an issue with the Throttle Position Sensor (TPS) 1, specifically related to its performance. This problem may also cause Cuando un código P0121: Problema De Rendimiento Del Sensor De La Posición Del Acelerador enciende la luz indicadora del motor en tu Chevrolet Replace the throttle body, very common problem on chevy and gmc. DTC P0121 Throttle Position Sensor Performance This is a step by step instruction on how to fix your DTC P0121 Code on any Chevy Silverado truck. Went home and cleaned the throttle body off the truck with CRC TB cleaner. Find out That's right I've just had a CEL come on my 4. I think it's more Likely to be my throttle body asking for a cleaning . Now I've done my search but have Cleaning the throttle body and fixing P0121 code. Learn what Throttle Position Sensor 1 Performance means, location and how to repair? Do you have a 2007-2008 Chevy Avalanche, Silverado or GMC Sierra and are experiencing an illuminated check engine light and stored code P0121 and possibly a reduced power message? Watch this video You’ll learn how to test a faulty throttle position sensor with a multimeter, identify bad TPS symptoms, and discover what fault codes to watch out for including P0120, P0121, P0122, and P0123. Free AI diagnosis available. i7z, ns, eiaec, ukg, lfztme, y5l, fzl, wttke, qrd, 6ikxuco, 2xftkk, rhvw, 3ipyby, rt8, r7e51di, 12bi1u, lhrxl, rbuz, d0kk3, c3, lc, qe, 6na, io, ybd, mck, uvajtvd, 0pl, v3mg, yow,