P2E44 code meaning
Hybrid/EV Electronics Coolant Pump B Control Circuit High
Powertrain system Generic code P2Exx codes Check engine light
What P2E44 means
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.
P2E44 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2E44
- MIL with hybrid system message
- Pump B runs continuously at high speed, audible hum
- Pump does not respond to commanded speed changes
Common causes of P2E44
- Most 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
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hybrid electronics coolant pump bPower electronics coolant loop
What each part of P2E44 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 44 | The exact fault in that area. |
What to do next
- Note P2E44 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2E44
What does P2E44 mean?
P2E44 means "Hybrid/EV Electronics Coolant Pump B Control Circuit High". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P2E44?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P2E44 fail an emissions test?
Yes, it can. P2E44 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2E44 to fix?
Difficulty: medium. A typical repair takes 0.5 to 3 hours of work. This is a job for a workshop.
Will P2E44 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.