Possible causes

– Faulty fuel injector 4
– Fuel Injector 4 harness is open or shorted
– Fuel injector 4 circuit poor electrical connection

When is the code detected?

The P0204 is set if the Engine Control Module (ECM) is detects a low or high voltage drop or resistance at the injector 4.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Lack/Loss of Power
– The engine may be harder to start
– Engine hesitation

P0204 Description

Engine Control Module (ECM) checks the injectors circuit resistance and monitors the voltage drop during normal operation. The ECM will trigger the P0204 code when the resistance or voltage drop at the injector 4 is out of specifications.

P0204 Information for specific makes

P0204 GMC
P0204 PONTIAC
P0204 CADILLAC
P0204 CHEVROLET
P0204 SATURN
P0204 JAGUAR
P0204 BUICK
P0204 BMW
P0204 CHRYSLER
P0204 HYUNDAI
P0204 ISUZU
P0204 KIA
P0204 LEXUS
P0204 MAZDA
P0204 MITSUBISHI
P0204 VOLKSWAGEN
P0204 FORD
P0204 NISSAN
P0204 DODGE
P0204 JEEP