P2E44Hybrid/EV Electronics Coolant Pump B Control Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2E44 is the opposite fault: the command line of electronics coolant pump B reads higher than its commanded state allows, mostly because it touches a battery-fed wire or the driver can no longer pull it down. Many PWM pumps react to a permanently high input with an emergency mode; Pierburg's interface runs the pump at about 95 % speed for a duty cycle of 98 to 100 %. The loop may therefore stay cooled while the controller has lost all influence on the speed, which also wastes energy and adds noise. Ford's 2024 summary lists circuit high (fault type 12) as a separate failure type of its auxiliary pumps. No manufacturer publicly documents P2E44. Look for harness sections rubbing against live wires, moisture and a defective output stage in the module. P2E43 covers the low side, P0CEC is pump A's equivalent.
- What you may notice
- MIL with hybrid system message
- Pump B runs continuously at high speed, audible hum
- Pump does not respond to commanded speed changes
- Likely causes
- LikelyControl wire shorted to a battery-voltage circuit
- PossibleModule output stage unable to pull the line low
- PossibleMoisture linking supply and signal pins in the connector
- 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.