P1138 OBD Trouble Code

1 result found

P1138 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

HO2S High Voltage During Decel Fuel Cutoff Conditions

Cause

DTC P0105, P0107, P0108, P0112, P0113, P0117, P0118, P0122, P0123, P0171, P0172, P0201, P0202, P0203, P0204, P0300, P0336, P0440, P0446, P0452, P0453, P0506, P0507, P0601, P0602 and P1441 not set, ECT input over 167°F, engine runtime over 10 seconds, fuel level over 10%, DFCO not on, and the PCM detected the HO2S-12 signal was over 648 mv for 10 seconds. /Vote: This test runs for 11 seconds after a 10 second delay.

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