P0263 Chevrolet Cylinder 1 Contribution Balance

P0263 Chevrolet Cylinder 1 Contribution Balance

Possible causes
– Dirty Fuel Injector 1
– Faulty Fuel Injector 1
– Plugged Fuel Injector 1
– Fuel injector 1 harness is open or shorted
– Fuel injector 1 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
P0263 Chevrolet Description

Code P0263 Chevrolet is triggered when the Engine Control Module (ECM) detects that the acceleration rate of the crankshaft for Cylinder 1 was less than a calibrated amount. During normal conditions the ECM turns the Fuel Injectors ON and OFF in the Fuel Injection System.