P1296 – Fuel System Learning Not Completed
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Symptoms
- Check engine light
- Unstable idle
- Poor fuel economy
- Hesitation
- Emissions readiness not set
Causes
- Battery recently disconnected
- ECU reset
- Vacuum leaks
- Fuel pressure issues
- Sensor faults
Diagnosis
- Check for other codes
- Verify no vacuum leaks
- Measure fuel pressure
- Drive through learning cycle
- Scan fuel trims
Repair
- Repair underlying faults
- Fix vacuum leaks
- Correct fuel pressure
- Complete drive cycle
- Clear codes and verify readiness