DTC P20C4 Chevrolet
Reductant Heater 3 Control Circuit High Voltage
Reductant Heater 3 Control Circuit High Voltage
Description
P20BC, P20C0, or P20C4 The DEF heater is commanded OFF.
Cause and Solution
P20BC, P20C0, or P20C4The ECM receives a GPCM serial data message indicating the heater control circuit is shorted to a voltage for greater than 2 s.
Video Guide
Diagnostic Info
- DTC Code: P20C4
- Brand: Chevrolet