P094C code meaning
Hydraulic Pump Performance/Stuck Off
Powertrain system Generic code P09xx codes Check engine light
What P094C means
The pump is commanded on but does not deliver: it does not turn, turns too slowly or produces too little pressure. The module judges this from pressure or speed feedback. No manufacturer documents this exact code publicly. Mercedes reports a comparable condition of the electric auxiliary oil pump on the 722.9 automatic under P0944; its test plan checks connector and fuse, supply voltage, CAN lines and software, then a check valve in the converter housing, before the pump is replaced. Hyundai lists a stuck high-flow pump on its 8-speed DCT as P193E71. CARB requires functional checks on outputs. P094B is the opposite fault, P094A the driver, P0944 the pressure loss of the whole unit.
P094C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 5 hours
- Clears after repairAfter a drive cycle
Symptoms of P094C
- Warning light on
- Engine restarts at once or stop-start not available
- Delayed engagement or lost drive
Common causes of P094C
- Most likelyAir in the pump after service or a suction leak
- PossibleSeized or failed pump motor
- PossibleBlocked strainer or leaking check valve
- Less likelySupply or relay fault stopping the pump
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hydraulic pumpTCM
What each part of P094C 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. |
| 4C | The exact fault in that area. |
What to do next
- Note P094C 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 P094C
What does P094C mean?
P094C means "Hydraulic Pump Performance/Stuck Off". The pump is commanded on but does not deliver: it does not turn, turns too slowly or produces too little pressure. It is a generic code, so it means the same on every make.
Is it safe to drive with P094C?
Drive gently and only to a workshop. With P094C the car can go into limp mode (reduced power) to protect itself.
Will P094C fail an emissions test?
Yes, it can. P094C 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 P094C to fix?
Difficulty: hard. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P094C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.