Possible causes

– Dirty Fuel Injector 11
– Faulty Fuel Injector 11
– Plugged Fuel Injector 11
– Fuel injector 11 harness is open or shorted
– Fuel injector 11 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

P0291 Description

Code P0291 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 11 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.

P0291 Information for specific makes

P0291 AUDI
P0291 VOLKSWAGEN