P0C74Motor Electronics Coolant Pump B Control Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P0C74 is the performance check for coolant pump B of the motor electronics, found on vehicles with a second electric pump in the power electronics cooling. The controller compares how the pump should run with how it actually runs and stores the code when the two disagree for longer than calibrated. Stellantis is the only maker found documenting it by code: for 2023-2024 Jeep Renegade and Compass 4xe with the 1.3 L plug-in hybrid, bulletins 08-165-24, 08-193-24 and 08-064-25 cure a lit MIL with P0C74 by flashing new software into the hybrid controller and the power inverter module, with no parts replaced. Where software is current, air in the loop, a worn or blocked pump and wiring faults remain. Pump A uses P0C73, pump C P2BD7.
- What you may notice
- Malfunction indicator lamp on
- Reduced electric drive power when the electronics run hot
- Likely causes
- LikelyHybrid control or inverter module software, fixed by an update
- PossibleAir pocket in the power electronics coolant loop
- PossiblePump B worn, blocked or seized
- RareDamaged wiring or corroded connector at pump B
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.