P1137moderate severityPowertrain
Long Term Fuel Trim System Too Lean Bank 2
on 1998 Audi A3 1.6L I4 · FWD
What this code means
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.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0011
Intake Camshaft Position Timing Over-Advanced Bank 1
P0012
Intake Camshaft Position Timing Over-Retarded Bank 1
P0013
Exhaust Camshaft Position Actuator Circuit/Open Bank 1
P0014
Exhaust Camshaft Position Timing Over-Advanced Bank 1
P0015
Exhaust Camshaft Position Timing Over-Retarded Bank 1