Engine Cooling System DTCS
DTC INDEX
| DTC | Description | Action |
|---|---|---|
| P0125 | Insufficient Coolant Temp For Closed Loop Fuel Control | GO to Pinpoint Test C |
| P0217 | Engine Coolant Overtemperature Condition | Diagnose all other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, GO to Pinpoint Test B |
| P0128 | Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature) | GO to Pinpoint Test C |
| P0480 | Fan 1 Control Circuit | Refer to Engine Controls - Powertrain DTC Charts & Descriptions (Hybrid) . |
| P0481 | Fan 2 Control Circuit | Refer to Engine Controls - Powertrain DTC Charts & Descriptions (Hybrid) . |
| P1285 | Cylinder Head Overtemperature Condition | Diagnose all other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, GO to Pinpoint Test B |
| P1299 | Cylinder Head Overtemperature Protection Active | Diagnose all other Diagnostic Trouble Codes (DTCs) first. If no other Diagnostic Trouble Codes (DTCs) are present, GO to Pinpoint Test B |
| P2600 | Coolant Pump "A" Control Circuit/Open | REFER to: Auxiliary Climate Control . |
| P2601 | Coolant Pump "A" Control Circuit Performance/Stuck Off | REFER to: Auxiliary Climate Control . |
| P2602 | Coolant Pump "A" Control Circuit Low | REFER to: Auxiliary Climate Control . |
| P2603 | Coolant Pump "A" Control Circuit High | REFER to: Auxiliary Climate Control . |
| P2682 | Engine Coolant Bypass Valve "A" Control Circuit Low | REFER to: Climate Control System . |
| P2683 | Engine Coolant Bypass Valve "A" Control Circuit High | REFER to: Climate Control System . |
| P26AB | Engine Coolant Bypass Valve "A" Stuck/Open | REFER to: Climate Control System . |
| P26CA | Engine Coolant Pump Control Circuit Open | GO to Pinpoint Test D |
| P26CB | Engine Coolant Pump Performance/Stuck Off | CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. REPEAT the PCM self-test. If DTC P26CB is retrieved again, INSTALL a new electric coolant pump. Refer to: Coolant Pump . |
| P26CE | Engine Coolant Pump Overspeed | CLEAR the Diagnostic Trouble Codes (DTCs). CHECK for low coolant level in degas bottle. If coolant is low, GO to Pinpoint Test A If the coolant is not low, there may be an air bubble in the system. Perform cooling system filling and bleeding. Refer to: Cooling System Draining, Filling and Bleeding . CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. REPEAT the PCM self-test. If DTC P26CE is retrieved again, INSTALL a new electric coolant pump. Refer to: Coolant Pump . |
| P26D0 | Engine Coolant Pump Control Module System Voltage Low | GO to Pinpoint Test D |
| P26D1 | Engine Coolant Pump Control Module System Voltage High | GO to Pinpoint Test D |
| P26D2 | Engine Coolant Pump Control Module Overtemperature | CLEAR the Diagnostic Trouble Codes (DTCs). TEST the system for normal operation. REPEAT the PCM self-test. If DTC P26D2 is retrieved again, INSTALL a new electric coolant pump. Refer to: Coolant Pump . |
| P26D3 | Engine Coolant Pump Supply Voltage Circuit | GO to Pinpoint Test D |
| U019F | Lost Communication With Engine Coolant Pump Control Module | GO to Pinpoint Test D |
| All Other PCM Diagnostic Trouble Codes (DTCs) | - | REFER to: Electronic Engine Controls - Plug-In Hybrid Electric Vehicle (PHEV) . |