P1277 – Fuel Injector E Short to Power
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Symptoms
- Rich running
- Black smoke
- Rough idle
- Poor fuel economy
- Check engine light
Causes
- Shorted wiring
- Stuck driver on
- Connector damage
- Incorrect repair
- Control module fault
Diagnosis
- Inspect wiring for shorts
- Check injector control with scope
- Inspect connector
- Scan fuel trims
- Check driver operation
Repair
- Repair wiring
- Replace injector if damaged
- Replace connector
- Repair or replace control module
- Clear codes and retest