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P1221 Diagnostic Trouble Code Discussion for July 2007

TP Sensor 2 Signal Correlation


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Trouble Ticket Help Requests for DTC P1221
Help Request Posted
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on, LOW POWER MODE VIN: 1GNDT13S22
P1221: TP Sensor 2 1-2 Correlation. ... Trail Blazer that presented a week ago with a check engine light and a low power light on. The vehicle would not accelerate. Several codes were found all relating to the TAC module (Throttle body) I don't remember what the codes were, but the problem was n...
July 10, 2007
1998 Chevrolet Corvette 5.7L MIL Lamp on, Loss of Power Light VIN: 1G1YY22G0W
P1221: TP Sensor 1-2 Signal Correlation. This car runs great! Allegedly has 560hp, until the Loss of Power message and MIL come on, then its all over. Customer says it ran great for 1 1/2 years after superchager was installed. I have had it come on for me at start up and on decel after several good r...
July 23, 2007
2002 Chevrolet Trailblazer LS 4.2L MIL Lamp on, LOW POWER MODE VIN: 1GNDT13S22
P1221: TP Sensor 2 1-2 Correlation. ... Trail Blazer that presented a week ago with a check engine light and a low power light on. The vehicle would not accelerate. Several codes were found all relating to the TAC module (Throttle body) I don't remember what the codes were, but the problem was n...
July 10, 2007
1998 Chevrolet Corvette 5.7L MIL Lamp on, Loss of Power Light VIN: 1G1YY22G0W
P1221: TP Sensor 1-2 Signal Correlation. This car runs great! Allegedly has 560hp, until the Loss of Power message and MIL come on, then its all over. Customer says it ran great for 1 1/2 years after superchager was installed. I have had it come on for me at start up and on decel after several good r...
July 23, 2007