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P1221 Diagnostic Trouble Code Discussion for April 2006

TP Sensor 2 Signal Correlation

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Trouble Ticket Help Requests for DTC P1221
Help Request Posted
1999 Pontiac Firebird 3.8L Hesitation, MIL Lamp on VIN: 2G2FS22K5X
P1221: tps 1 and 2 disagree. ... pedal is moved and sets a p1221 instantly. Will make this noise for 10-15 seconds at a time.Noise is throttle mtr. in the t body. Does the same when key is turned on or off. replaced/reflashed pcm, Installed a Used t body assy, new tac module, verify all p...
April 18, 2006