Long Term Fuel Trim Upper Limit Lean
2007-2016 Volvo S80 3.2L I6
Description
The ECM detected that the long-term fuel trim has reached its upper lean correction limit. The fuel system cannot add enough fuel to compensate for the persistent lean condition.
Symptoms
- Check Engine Light
- Rough idle
- Hesitation on acceleration
- Poor fuel economy
- Possible lean misfire
Common Causes
- Vacuum leak in intake system
- Faulty MAF sensor
- Weak fuel pump
- Clogged fuel injectors
- PCV system fault
Diagnostic Steps
- Perform smoke test for vacuum leaks
- Monitor fuel trim values
- Test fuel pressure and volume
- Clean or test MAF sensor
- Inspect PCV system
Repair Notes
Repair vacuum leaks first; address fuel delivery if trims remain at the lean limit.
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
P1171 on Other Vehicles
Common Questions
What does code P1171 mean on a 2007-2016 Volvo S80?
P1171 stands for "Long Term Fuel Trim Upper Limit Lean". The ECM detected that the long-term fuel trim has reached its upper lean correction limit. The fuel system cannot add enough fuel to compensate for the persistent lean condition.
What are the symptoms of P1171 on a Volvo S80?
Common symptoms of P1171 include: Check Engine Light, Rough idle, Hesitation on acceleration, Poor fuel economy, Possible lean misfire.
What causes P1171 on a 2007-2016 Volvo S80?
Common causes of P1171 include: Vacuum leak in intake system, Faulty MAF sensor, Weak fuel pump, Clogged fuel injectors, PCV system fault.