Possible causes

– Dirty Fuel Injector 1
– Faulty Fuel Injector 1
– Plugged Fuel Injector 1
– Fuel injector 1 harness is open or shorted
– Fuel injector 1 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

P0261 AUDI Description

Code P0261 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 1 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.