DTC P12B4 GMC
Lost Communication With Charge Air Cooler Coolant Pump
Lost Communication With Charge Air Cooler Coolant Pump
Description
The Powertrain Control Module (PCM) does not receive a LIN BUS message from the Charge Air Cooler Pump for 2.6 seconds.
Cause and Solution
CHARGE AIR COOLER COOLANT PUMP FUSED B+ CIRCUIT OPENCHARGE AIR COOLER COOLANT PUMP FUSED B+ CIRCUIT SHORTED TO GROUNDASD RELAY OUTPUT CIRCUIT OPENASD RELAY OUTPUT CIRCUIT SHORTED TO GROUNDCHARGE AIR COOLER PUMP GROUND CIRCUIT OPENLIN BUS CIRCUIT OPEN HIGH RESISTANCELIN BUS CIRCUIT SHORTED TO GROUNDCHARGE AIR COOLER COOLANT PUMPPOWERTRAIN CONTROL MODULE
Video Guide
Diagnostic Info
- DTC Code: P12B4
- Brand: GMC