P1264 FIAT Cylinder #4 High To Low Side Short

Possible causes

– Fuel injector No. 4 output circuit open or short to ground.
– Injector.
– Faulty Engine Control Module (ECM)

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1264 FIAT Description

Indicates a low voltage condition exists at the injector output of the NG module for cylinder No. 4 when high voltage is expected.