Long Term Fuel Trim System Too Lean Bank 2
1997-2003 Audi A8 4.2L V8
Description
The ECU detected that the long-term fuel trim for Bank 2 has reached the maximum lean correction limit. The fuel system cannot add enough fuel to compensate for the lean condition.
Symptoms
- Check Engine Light
- Rough idle
- Lean misfire Bank 2
- Hesitation
- Reduced power
Common Causes
- Vacuum leak at Bank 2 intake
- Clogged fuel injectors Bank 2
- Low fuel pressure
- Intake manifold runner flap issues
- MAF sensor fault
Diagnostic Steps
- Smoke test for vacuum leaks at Bank 2
- Compare fuel trims between banks
- Test fuel injector flow Bank 2
- Check fuel pressure
- Test MAF sensor output
Repair Notes
Repair vacuum leaks or fuel delivery issues specific to Bank 2.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1137 on Other Vehicles
Common Questions
What does code P1137 mean on a 1997-2003 Audi A8?
P1137 stands for "Long Term Fuel Trim System Too Lean Bank 2". The ECU detected that the long-term fuel trim for Bank 2 has reached the maximum lean correction limit. The fuel system cannot add enough fuel to compensate for the lean condition.
What are the symptoms of P1137 on a Audi A8?
Common symptoms of P1137 include: Check Engine Light, Rough idle, Lean misfire Bank 2, Hesitation, Reduced power.
What causes P1137 on a 1997-2003 Audi A8?
Common causes of P1137 include: Vacuum leak at Bank 2 intake, Clogged fuel injectors Bank 2, Low fuel pressure, Intake manifold runner flap issues, MAF sensor fault.