Possible causes

– Dirty Fuel Injector 7
– Faulty Fuel Injector 7
– Plugged Fuel Injector 7
– Fuel injector 7 harness is open or shorted
– Fuel injector 7 circuit poor electrical connection

Tech notes

Clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Engine Misfire
– Engine Run Rough
– Low MPG

P0279 AUDI Description

Code P0279 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 7 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.