Mixture Adaptation Bank 1 Limit Reached
1997-2003 Audi A8 4.2L V8
Description
The ECU detected that the mixture adaptation (learned fuel trim) for Bank 1 has reached its maximum or minimum correction limit. The long-term adaptation values are outside normal operating range.
Symptoms
- Check Engine Light
- Poor fuel economy
- Rough idle
- Hesitation
- Possible misfire
Common Causes
- Vacuum leak
- MAF sensor drift
- Fuel injector fouling
- Fuel pressure issue
- Exhaust leak before O2 sensor
Diagnostic Steps
- Reset adaptation values and monitor re-learning
- Perform smoke test for vacuum leaks
- Check MAF sensor readings
- Test fuel pressure
- Inspect for exhaust leaks before O2 sensor
Repair Notes
Repair the underlying air or fuel delivery issue causing adaptation limits to be reached.
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
P1176 on Other Vehicles
Common Questions
What does code P1176 mean on a 1997-2003 Audi A8?
P1176 stands for "Mixture Adaptation Bank 1 Limit Reached". The ECU detected that the mixture adaptation (learned fuel trim) for Bank 1 has reached its maximum or minimum correction limit. The long-term adaptation values are outside normal operating range.
What are the symptoms of P1176 on a Audi A8?
Common symptoms of P1176 include: Check Engine Light, Poor fuel economy, Rough idle, Hesitation, Possible misfire.
What causes P1176 on a 1997-2003 Audi A8?
Common causes of P1176 include: Vacuum leak, MAF sensor drift, Fuel injector fouling, Fuel pressure issue, Exhaust leak before O2 sensor.