P276CElectric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P276C flags an excessive voltage on the motor supply of auxiliary pump B. Either the circuit is shorted to another powered line, the pump module measures wrongly, or the vehicle charging system itself overshoots. No manufacturer documents P276C publicly. Audi's bulletin 34-17-25 identifies pump B on its 0CJ, 0CK and 0CL dual-clutch units as the gear oil pump V553 and lists the low-voltage sibling P276B for it; P0B0B is the matching high code for pump A. CARB requires actuators to be watched for out-of-range electrical values. An overvoltage can overheat the pump electronics, so many modules switch the pump off. Before replacing parts, measure the charging voltage at running engine and inspect the supply wiring for chafing.
- What you may notice
- Transmission warning lamp
- Pump switched off, stop-start unavailable
- Other overvoltage codes if charging is at fault
- Likely causes
- PossibleCharging system voltage too high
- PossibleSupply wire shorted to another powered circuit
- PossibleFaulty measurement in the pump control electronics
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.