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Home >> Chevrolet >> 2002 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P1221: Throttle Position Sensor 1 & 2 Disagree >> Test Description

Test Description

The number below refers to the step number in the diagnostic procedures.

  1. 18

    When the TAC module detects a condition within the ETC system, the PCM receives a message across serial data. More than 1 ETC system-related DTC may set. This condition is due to the many redundant tests that run continuously on this system. Locating and repairing 1 individual condition may correct more than 1 DTC. Be aware of this condition when you review the captured DTC info.
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