Audi A6 U278D Engine Trouble Code
When your car's 'Audi A6 U278D Check Engine' light comes on, it's usually accompanied by a sinking feeling in the pit of your stomach. The light could mean a costly problem, like a bad catalytic converter, or it could be something minor, like a loose gas cap. But in many cases, it means at minimum that you'll be visiting the car dealer to locate the malfunction and get the light turned off.
Audi A6 U278D Code Meaning :
OBD-II Diagnostic Network (U) Trouble Code For Engine
Fuel And Air Metering (Injector Circuit Malfunctions Only)
Engine Oil Temperature Sensor Malfunction
Cylinder 10 Contribution/balance Fault
Exhaust Gas Recirculation Sensor B Circuit High

When you check Audi A6 car engine light came on code U278D the reason should be . However manufacturer may have a different definition for the U278D OBD-II Diagnostic Network (U) Trouble Code. So you should chech it on our car models.
U278D OBD-II Diagnostic Network (U) Trouble Code Description
U278D engine trouble code is about Exhaust Gas Recirculation Sensor B Circuit High.Reason For U278D Code
The reason of U278D OBD-II Engine Trouble Code is Engine Oil Temperature Sensor Malfunction.U278D code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission.
U278C Previous Engine Trouble Code For Audi A6 | Next Engine Trouble Code For Audi A6 U278E |