P0277 Cylinder 6 Injector Circuit High

Possible causes

– Dirty Fuel Injector 6
– Faulty Fuel Injector 6
– Plugged Fuel Injector 6
– Fuel injector 6 harness is open or shorted
– Fuel injector 6 circuit poor electrical connection

Tech description

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

P0277 Description

Code P0277 is triggered when the Engine Control Module (ECM) detects a high voltage in the Fuel Injector 6 Circuit. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.