P094E code meaning
Hydraulic Pump Supply Voltage Circuit/Open
Powertrain system Generic code P09xx codes Check engine light
What P094E means
Fault in the power feed of the hydraulic or electric oil pump: fuse, supply wire, connector or relay output. The module sees missing or implausible supply at the pump or its controller. No manufacturer documents this exact code publicly. Mercedes shows the checks that belong to it on the electric auxiliary oil pump of the 722.9 automatic, although it reports that pump under P0944: connector and fuse first, then supply voltage and CAN lines. Hyundai lists an open circuit of its DCT high-flow pump as P193D13. CARB requires circuit checks on outputs. P0945 to P0948 concern the control side, P094A the driver, P0562 general low system voltage. Without supply the pump stops and stop-start is usually blocked.
P094E at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P094E
- Warning light on
- Pump does not run
- Stop-start disabled or gearbox in limp mode
Common causes of P094E
- Most likelyBlown pump fuse
- PossibleOpen or corroded supply wire or connector
- Less likelyWeak battery or poor main ground lowering pump supply voltage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hydraulic pumpWiring harnessTCM
What each part of P094E means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 9 | Area: transmission. |
| 4E | The exact fault in that area. |
What to do next
- Note P094E 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 P094E
What does P094E mean?
P094E means "Hydraulic Pump Supply Voltage Circuit/Open". Fault in the power feed of the hydraulic or electric oil pump: fuse, supply wire, connector or relay output. It is a generic code, so it means the same on every make.
Is it safe to drive with P094E?
Drive gently and only to a workshop. With P094E the car can go into limp mode (reduced power) to protect itself.
Will P094E fail an emissions test?
Yes, it can. P094E 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 P094E to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P094E clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.