P0C29 code meaning
Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance
Powertrain system Generic code P0Cxx codes Check engine light
What P0C29 means
P0C29 means the driver stage of auxiliary pump A does not behave as commanded, for instance the pump does not reach its target or the activation is reported as implausible. Volkswagen Group documents it on the 7-speed DSG 0GC (DQ381): VW lists P0C29 for the 2018 Golf R as implausible activation of auxiliary hydraulic pump 1 (V475), often with clutch and gear actuator codes as consequences; Audi's bulletin for the 2017-18 A3, A3 Cabriolet and S3 with gearbox dated up to 26 September 2017 calls for replacing the auxiliary hydraulic pump when only P0C29 remains. The customer sees a Gearbox Malfunction warning. VW improved the pump from October 2017 production. P0C2A is a stalled motor, P0C26 to P0C28 current faults.
P0C29 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor2 to 8 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0C29
- Gearbox Malfunction warning in the instrument cluster
- Consequential clutch or gear actuator codes, limp mode
Common causes of P0C29
- Most likelyAuxiliary hydraulic pump V475 of early production faulty (VW/Audi 0GC)
- PossiblePoor contact at the pump electrical connection
- Less likelyTransmission control software not updated per service action
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump a driver
What each part of P0C29 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| C | Area: hybrid propulsion. |
| 29 | The exact fault in that area. |
What to do next
- Note P0C29 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 P0C29
What does P0C29 mean?
P0C29 means "Electric/Auxiliary Transmission Fluid Pump A Driver Circuit Performance". P0C29 means the driver stage of auxiliary pump A does not behave as commanded, for instance the pump does not reach its target or the activation is reported as implausible. It is a generic code, so it means the same on every make.
Is it safe to drive with P0C29?
Drive gently and only to a workshop. With P0C29 the car can go into limp mode (reduced power) to protect itself.
Will P0C29 fail an emissions test?
Yes, it can. P0C29 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 P0C29 to fix?
Difficulty: workshop only. A typical repair takes 2 to 8 hours of work. This is a job for a workshop.
Will P0C29 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.