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Home >> Pontiac >> 2008 >> Grand Prix GXP >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 3.8L - DTC P0385 To DTC P2108) >> DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610 >> Conditions for Setting the DTC >> P0604 >> P0606

Conditions for Setting the DTC: P0604: P0606

WARNING: This page is about a different variant/trim than selected.

The PCM detects that the TAC system has a process sequence error, clock error, or processor is not operating correctly. Each test runs in 18.5 milliseconds. DTC sets after 200 milliseconds that a fault is detected.