P094EHydraulic Pump Supply Voltage 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
- 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.
- What you may notice
- Warning light on
- Pump does not run
- Stop-start disabled or gearbox in limp mode
- Likely causes
- LikelyBlown pump fuse
- PossibleOpen or corroded supply wire or connector
- RareWeak battery or poor main ground lowering pump supply voltage
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €10 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.