P2E41Hybrid/EV Electronics Coolant Pump B Control Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2E41 flags an electrical fault on the line over which the controller commands electronics coolant pump B, the second pump serving inverter, DC/DC converter and frequently the charger; the maker decides which pump is B. No manufacturer publicly documents P2E41. GM's 2018 hybrid tables show the logic for the pump A counterpart P0CE9: the controller watches the current on the PWM command line and fails it below 200 mA or above 3 A while active, after 16 failures in 20 samples taken every 250 ms, Type B. Ford's 2024 summary checks the command line of its auxiliary pump B for an open circuit (fault type 13) within 5 s at 11 V or more. Broken wires, corroded pins and pumps with dead input electronics are typical. Audi logged pump A's circuit code on the e-tron alongside low coolant. Low and High are P2E43 and P2E44.
- What you may notice
- Hybrid or electric drive warning and MIL
- Pump B does not run, electronics loop warms up faster
- Reduced drive power or interrupted charging under high load
- Likely causes
- LikelyBroken or disconnected control wire between module and pump B
- PossibleCorroded or pushed-back pins at the pump connector
- PossiblePump B electronics no longer load the command line
- RareFaulty output stage in the controlling module
- 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 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.