P27E2Electric/Auxiliary Transmission Fluid Pump B Pressure Too Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P27E2 flags that the second electric pump, B, delivered too little pressure although it was driven. Nobody publishes this code openly. Where a gearbox carries a pump labelled B, it is often a separate unit on the outside of the case: Audi's bulletin 34-17-25 calls oil pump V553 of the 0CJ, 0CK and 0CL seven-speed twin-clutch boxes pump B and lists P27A3, P27A6 and P276B for it, but not P27E2. CARB 13 CCR 1968.2 requires such actuators to be checked for proper function. Compared with P27A3, which covers no delivery at all, P27E2 points to a pump that works but weakly; P277A singles out hydraulic leakage, P27E1 is the same check on pump A. Expect stop-start or clutch cooling to be restricted.
- What you may notice
- Stop-start no longer stops the engine
- Reduced clutch cooling, power limited when hot
- Warning light on
- Likely causes
- LikelyPump B worn, motor running but delivering too little
- PossibleLeaking O-ring or pressure line between pump B and the gearbox
- PossibleFluid level too low for pump B to prime
- RareWeak battery or poor ground slowing the pump motor
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €100 – €1,800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.