Possible causes

– Dirty Fuel Injector 9
– Faulty Fuel Injector 9
– Plugged Fuel Injector 9
– Fuel injector 9 harness is open or shorted
– Fuel injector 9 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

P0285 Description

Code P0285 is triggered when the Engine Control Module (ECM) detects a low voltage in the Fuel Injector 9 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.

P0285 Information for specific makes

P0285 AUDI
P0285 VOLKSWAGEN