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Home >> Cadillac >> 2004 >> CTS Base, 3.6 7 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls - 2.6L & 3.2L - Diagnosis (DTC P0030 - P0174)) >> Diagnostic Trouble Codes >> DTC P0031, P0037, P0051, or P0057 >> Conditions for Setting the DTC

Conditions for Setting the DTC

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

The ECM detects that the HO2S heater low control circuit voltage is below 2.6 volts when the heater is commanded OFF, indicating a shorted HO2S heater circuit.

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