Possible causes

– Dirty Fuel Injector 4
– Faulty Fuel Injector 4
– Plugged Fuel Injector 4
– Fuel injector 4 harness is open or shorted
– Fuel injector 4 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

P0271 Description

Code P0271 is triggered when the Engine Control Module (ECM) detects a high voltage in the Fuel Injector 4 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.

P0271 Information for specific makes

P0271 BMW
P0271 CHRYSLER
P0271 JEEP
P0271 DODGE
P0271 FORD
P0271 HYUNDAI
P0271 KIA
P0271 MAZDA
P0271 AUDI
P0271 VOLKSWAGEN