P0263
P0263 - Cylinder 1 Contribution/Balance Fault
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Possible causes
- Fuel injector 1 harness is open or shorted
- Fuel injector 1 Circuit poor electrical connection
- Plugged Fuel Injector 1
- Dirty Fuel Injector 1
- Faulty Fuel Injector 1
- Fuel injector 1 Circuit poor electrical connection
- Plugged Fuel Injector 1
- Dirty Fuel Injector 1
- Faulty Fuel Injector 1
Tech notes
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
- Engine Misfire
- Engine Run Rough
- Low MPG
P0263 Description
Code P0263 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.
P0263 Information for specific makes
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