P1177
Mixture Adaptation Bank 2 Limit Reached
1997-2003 Audi A8 4.2L V8
Moderate SeverityPowertrain
Description
The ECU detected that the mixture adaptation for Bank 2 has reached its maximum or minimum correction limit. This is the Bank 2 equivalent of P1176.
Symptoms
- Check Engine Light
- Rough idle
- Poor fuel economy
- Hesitation under load
Common Causes
- Vacuum leak at Bank 2
- MAF sensor fault
- Fuel injector issue Bank 2
- Fuel pressure regulator fault
- Exhaust leak Bank 2
Diagnostic Steps
- Reset adaptations and monitor
- Smoke test focusing on Bank 2
- Compare fuel trims between banks
- Test fuel pressure
- Check for exhaust leaks Bank 2
Repair Notes
Repair the root cause of adaptation limit on Bank 2.
Related Codes
P1136Long Term Fuel Trim System Too Rich Bank 2P1136Long Term Fuel Trim System Too Rich Bank 2P1136Long Term Fuel Trim System Too Rich Bank 2P1136Long Term Fuel Trim System Too Rich Bank 2P1136Long Term Fuel Trim System Too Rich Bank 2P1136Cooling Fan for Control Modules Signal FaultP1137Front Oxygen A/F Sensor Range/Performance ProblemP1137Long Term Fuel Trim System Too Lean Bank 2P1137Long Term Fuel Trim System Too Lean Bank 2P1137Long Term Fuel Trim System Too Lean Bank 2P1137Long Term Fuel Trim System Too Lean Bank 2P1137Long Term Fuel Trim System Too Lean Bank 2P1176Mixture Adaptation Bank 1 Limit ReachedP1176Mixture Adaptation Bank 1 Limit ReachedP1176Mixture Adaptation Bank 1 Limit ReachedP1176Mixture Adaptation Bank 1 Limit ReachedP1176Mixture Adaptation Bank 1 Limit Reached
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
P1177 on Other Vehicles
Common Questions
What does code P1177 mean on a 1997-2003 Audi A8?
P1177 stands for "Mixture Adaptation Bank 2 Limit Reached". The ECU detected that the mixture adaptation for Bank 2 has reached its maximum or minimum correction limit. This is the Bank 2 equivalent of P1176.
What are the symptoms of P1177 on a Audi A8?
Common symptoms of P1177 include: Check Engine Light, Rough idle, Poor fuel economy, Hesitation under load.
What causes P1177 on a 1997-2003 Audi A8?
Common causes of P1177 include: Vacuum leak at Bank 2, MAF sensor fault, Fuel injector issue Bank 2, Fuel pressure regulator fault, Exhaust leak Bank 2.