P276B code meaning
Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit Low
Powertrain system Generic code P27xx codes Check engine light
What P276B means
P276B is set when the supply voltage reaching the motor of auxiliary transmission pump B sags below its lower limit. Audi names this code in bulletin 34-17-25 (revision of September 2017) covering 2017 A4/A5/A6 models and the 2018 Q5 fitted with the 0CJ, 0CK or 0CL twin-clutch gearbox. Pump B there is the gear oil pump V553, and P276B00 may appear together with lost communication U28A00, stuck-on P27A600 and performance P27A300. The bulletin attributes a rattle from under the car to a supplier assembly issue and calls for a new pump with new bolts; transmission fluid must not reach the electrical connector during removal. Apart from that case, weak batteries, high-resistance grounds and partial shorts can pull the voltage down.
P276B at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyHard
- Typical labor1 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P276B
- Rattle noise from under the vehicle (Audi)
- Transmission warning lamp
- Further pump B codes stored
Common causes of P276B
- Most likelyDefective gear oil pump V553 (Audi 0CJ/0CK/0CL)
- PossibleHigh resistance in supply or ground of the pump
- Less likelyLow system voltage from a weak battery
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 circuitBattery
What each part of P276B 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. |
| 6B | The exact fault in that area. |
What to do next
- Note P276B 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 P276B
What does P276B mean?
P276B means "Electric/Auxiliary Transmission Fluid Pump B Motor Supply Voltage Circuit Low". P276B is set when the supply voltage reaching the motor of auxiliary transmission pump B sags below its lower limit. It is a generic code, so it means the same on every make.
Is it safe to drive with P276B?
Drive gently and only to a workshop. With P276B the car can go into limp mode (reduced power) to protect itself.
Will P276B fail an emissions test?
P276B 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 P276B to fix?
Difficulty: hard. A typical repair takes 1 to 4 hours of work. This is a job for a workshop.
Will P276B clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.