P0DE4 code meaning
Electric/Auxiliary Transmission Fluid Pump A Motor Over Temperature
Powertrain system Generic code P0Dxx codes Check engine light
What P0DE4 means
P0DE4 reports that the electric motor of auxiliary transmission fluid pump A has run too hot. Such a pump keeps the transmission pressurised while the engine is stopped, either by start-stop or during electric driving in a hybrid. No manufacturer documents P0DE4 publicly. Ford's 2019 hybrid OBD summary shows how its plug-in hybrids treat pump heat under other codes: once the pump circuit board exceeds 130 °C for 3 s the TCM logs P175A and disables the pump, and above 135 °C the event feeds the stall code P0C2A. Heat builds when the motor labours against low, aged or very cold fluid, against a binding rotor, or in a hot transmission. The car then usually keeps the engine running instead of stopping or driving electrically. P0C1B is the controller electronics, P277D the motor of pump B.
P0DE4 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0DE4
- Start-stop no longer shuts the engine off
- Electric driving limited, engine keeps running
- Harsh engagement when pulling away after a stop
- Malfunction indicator lamp on
Common causes of P0DE4
- Most likelyLow, aged or wrong transmission fluid making the pump work harder
- PossibleBinding rotor or worn bearing in the pump motor
- PossibleTransmission running hot (towing, heat, restricted fluid cooler)
- Less likelyFaulty temperature evaluation in the pump controller or outdated software
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump a motor
What each part of P0DE4 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| E4 | The exact fault in that area. |
What to do next
- Note P0DE4 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 P0DE4
What does P0DE4 mean?
P0DE4 means "Electric/Auxiliary Transmission Fluid Pump A Motor Over Temperature". P0DE4 reports that the electric motor of auxiliary transmission fluid pump A has run too hot. It is a generic code, so it means the same on every make.
Is it safe to drive with P0DE4?
Drive gently and only to a workshop. With P0DE4 the car can go into limp mode (reduced power) to protect itself.
Will P0DE4 fail an emissions test?
Yes, it can. P0DE4 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 P0DE4 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0DE4 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.