P1137 – Fuel Trim Too Rich (Bank 1)
Want to confirm the real cause of this fault code?
A high‑quality OBD2 scanner gives you live data, fuel trims, sensor readings and freeze‑frame information — exactly what you need to verify the root cause of this code with confidence.
Symptoms
- Rough idle
- Poor fuel economy
- Black smoke
- Hesitation
- Check engine light
Causes
- Leaking injector
- High fuel pressure
- Faulty O2 sensor
- MAF contamination
- ECU issue
Diagnosis
- Check fuel trims
- Inspect injectors
- Test fuel pressure
- Inspect O2 sensors
- Scan live data
Repair
- Replace injectors
- Replace O2 sensor
- Clean MAF
- Repair wiring
- Fix fuel pressure