P276C code meaning
Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit High
Powertrain system Generic code P27xx codes Check engine light
What P276C means
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.
P276C at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P276C
- Transmission warning lamp
- Pump switched off, stop-start unavailable
- Other overvoltage codes if charging is at fault
Common causes of P276C
- PossibleCharging system voltage too high
- PossibleSupply wire shorted to another powered circuit
- PossibleFaulty measurement in the pump control electronics
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Aux trans pump bSupply circuitCharging system
What each part of P276C 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. |
| 6C | The exact fault in that area. |
What to do next
- Note P276C 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 P276C
What does P276C mean?
P276C means "Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit High". P276C flags an excessive voltage on the motor supply of auxiliary pump B. It is a generic code, so it means the same on every make.
Is it safe to drive with P276C?
Drive gently and only to a workshop. With P276C the car can go into limp mode (reduced power) to protect itself.
Will P276C fail an emissions test?
P276C 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 P276C to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P276C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.