Concerns the electronic driver that powers the motor of a hydraulic or electric oil pump, often a separate pump controller. The driver reports, or the module infers, that it cannot deliver the commanded speed or current although the circuit is not open or shorted. No manufacturer documents this exact code publicly. Hyundai shows what such a driver monitors on its wet 8-speed DCT pumps: overcurrent, current and Hall sensor faults and internal faults, filed under its own P193D and P1C2E codes. Mercedes reports an internal fault of the 722.9 auxiliary oil pump under P0944 instead. CARB requires functional checks on outputs. P094B and P094C are stuck pump faults, P094D overheating, P094E supply; P0C29 is the equivalent for auxiliary fluid pumps of automatics.
Medium severity. Can I keep driving?Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
Symptoms
- Warning light on
- Auto stop-start disabled
- Delayed engagement or slower shifts
Most likely causes
- Internal fault of the pump controller or driver stage
- Pump motor drawing excess current (worn bearings, fluid in motor)
- High resistance in supply or ground of the driver
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: hard
- It can trigger limp mode.
- It affects emissions.
What each character of P094A means
- P: Powertrain: engine and transmission
- 0: Generic code: same on every make
- 9: Transmission
- 4A: Specific fault in that system
Frequently asked questions
Can I keep driving with code P094A?
Drive gently to a repair shop. If it slips, you hear clunks, or it loses its gears, do not keep driving.
What causes code P094A?
The most common causes are: internal fault of the pump controller or driver stage; pump motor drawing excess current (worn bearings, fluid in motor); high resistance in supply or ground of the driver.
Related codes
- P094BHydraulic Pump Stuck On
- P094CHydraulic Pump Performance/Stuck Off
- P094DHydraulic Pump Over Temperature
- P094EHydraulic Pump Supply Voltage Circuit/Open
- P0C29Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance
Sources
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.