P0C74: Motor Electronics Coolant Pump B Control Performance — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Motor Electronics Coolant Pump B Control Performance. Basic catalogue definition; diagnostic details have not yet been reviewed.
Affected system: Powertrain
Symptoms
- System warning may illuminate
- Affected feature may be unavailable
- Symptoms depend on the vehicle
Possible causes
- Hybrid powertrain sensor, actuator, power supply, connector, or control issue
- Module power, ground, or connector fault
- Vehicle-specific mechanical or control issue
What to check
- Record all available module faults
- Record hybrid and electric powertrain module faults with a compatible scan tool. Check the specified low-voltage supplies and module data first; follow vehicle-specific high-voltage safety procedures for further diagnosis.
- Compare results with vehicle-specific service information
- Verify the repair
- Record hybrid and electric powertrain module faults with a compatible scan tool. Check the specified low-voltage supplies and module data first; follow vehicle-specific high-voltage safety procedures for further diagnosis.
- Repair the verified cause and rescan all affected modules
Also written as: P0C74-00, P0C7400, POC74 (some scan tools add the fault-type byte, e.g. -00).