DTC C129 Chevrolet
EVAP System Incorrect Purge Flow Detected
EVAP System Incorrect Purge Flow Detected
Description
ECT sensor from 158-230ºF, IAT sensor from 14-158ºF, BARO sensor over 75 kPa, fuel level from 25-75%, engine started and running at idle in closed loop, and the PCM detected an incorrect engine speed change after the Purge solenoid was cycled off and on at a duty cycle of over 50% during a 20 second test period.
Cause and Solution
EVAP purge solenoid control circuit open or shorted to groundEVAP purge solenoid power (B+) circuit openEVAP purge solenoid is damaged or has failedPCM has failed
Video Guide
Diagnostic Info
- DTC Code: C129
- Brand: Chevrolet