P27A6 code meaning
Electric/Auxiliary Transmission Fluid Pump B Stuck On
Powertrain system Generic code P27xx codes Check engine light
What P27A6 means
P27A6 reports that auxiliary pump B keeps running, or keeps drawing current, while the controller has it switched off. Audi lists P27A600 in bulletin 34-17-25 for 2017 A4, A5 and A6 and 2018 Q5 models with 0CJ, 0CK and 0CL dual-clutch gearboxes; there the code may appear together with a rattle from the gear oil pump V553, which Audi traced to an assembly fault at the supplier and cures with a new pump. More generally, a pump that will not stop points to its own control electronics, a driver or relay that remains closed, or a control wire shorted to voltage, the case covered by P27A5. On pump A the same fault is P27A1. Apart from noise, a pump that never rests drains the 12 V battery and wears out early.
P27A6 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyHard
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P27A6
- Pump noise or rattle from the gearbox area with the engine off
- Weak or flat 12 V battery
- Transmission warning stored
Common causes of P27A6
- Most likelyPump B module or electronics defective (e.g. Audi V553 supplier fault)
- PossibleDriver output or relay remains closed
- Less likelyControl line shorted to battery voltage
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump bControl moduleWiring harness
What each part of P27A6 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 7 | Area: transmission. |
| A6 | The exact fault in that area. |
What to do next
- Note P27A6 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 P27A6
What does P27A6 mean?
P27A6 means "Electric/Auxiliary Transmission Fluid Pump B Stuck On". P27A6 reports that auxiliary pump B keeps running, or keeps drawing current, while the controller has it switched off. It is a generic code, so it means the same on every make.
Is it safe to drive with P27A6?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P27A6 fail an emissions test?
P27A6 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P27A6 to fix?
Difficulty: hard. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P27A6 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.