Possible causes
– Fuel injector No. 4 output circuit open or short to ground.
– Injector.
– Faulty Engine Control Module (ECM)
– Injector.
– Faulty Engine Control Module (ECM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1264 Description
Indicates a low voltage condition exists at the injector output of the NG module for cylinder No. 4 when high voltage is expected.
P1264 Information for specific makes
P1264 FORD