P1261 Chevrolet Cylinder #1 High To Low Side Short

P1261 Chevrolet Cylinder #1 High To Low Side Short

Possible causes
– Fuel injector No. 1 output circuit open or short to ground.
– Injector.
– Faulty Engine Control Module (ECM)
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1261 Chevrolet Description

Indicates a low voltage condition exists at the injector output of the NG module for cylinder No. 1 when high voltage is expected.