P1299 – Fuel System Protection Active
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Symptoms
- Reduced power
- Limp mode
- Check engine light
- Warning messages
- Possible overheat or pressure issues
Causes
- Overheat condition
- Fuel pressure fault
- Severe misfire
- Sensor failure
- ECU protection strategy
Diagnosis
- Scan all modules
- Check for overheat codes
- Measure fuel pressure
- Check misfire data
- Inspect sensor readings
Repair
- Repair root cause faults
- Correct cooling issues
- Repair fuel pressure problems
- Replace faulty sensors
- Clear codes and verify operation