P0E50Motor Electronics Coolant Pump B Control Circuit Intermittent/Erratic
- 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
- P0E50 is the intermittent or erratic fault of the control circuit for coolant pump B, the second electric pump some hybrids use in the inverter and motor electronics cooling. No manufacturer documents P0E50 publicly. The closest published example is Ford's pump A version, P0E4F, stored when the pump's feedback leaves its expected frequency or duty cycle for over 1 s. Second pumps of this kind are in service: on the 2024 Jeep Compass 4xe, Stellantis bulletin 08-200-24 cures the pump B performance code P0C74 by reprogramming the hybrid control processors. CARB requires inverter cooling outputs to be monitored for circuit faults. Steady open, low and high faults of pump B are P0B38 to P0B3A. Short dropouts briefly reduce coolant flow and may trigger a power limit.
- What you may notice
- Warning light that appears now and then
- Temporary power reduction under high load or heat
- Likely causes
- LikelyIntermittent contact at the pump B connector or a harness splice
- PossiblePump B electronics producing an unstable signal
- RareControl module software evaluating the pump signal too strictly
- 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: €60 – €650
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.