Infiniti DTC P1171 – Fuel System Lean During Acceleration
DTC P1171 meaning on Infiniti
DTC P1171 on an Infiniti indicates a fuel system lean condition during acceleration. This means that the engine is not receiving enough fuel relative to the amount of air being taken in during acceleration.
Infiniti DTC P1171 symptoms
- Check Engine Light (CEL) illuminated
- Decreased engine performance
- Engine hesitation or stumbling during acceleration
- Possible rough idle
Infiniti DTC P1171 causes
- Vacuum leaks in the intake system
- Fuel delivery issues such as a clogged fuel filter or weak fuel pump
- Faulty oxygen sensor
- Mass Air Flow (MAF) sensor malfunction
- Issues with the fuel injectors
Infiniti DTC P1171 seriousness
The DTC P1171 code should not be ignored as it can lead to poor engine performance, reduced fuel efficiency, and potential damage to engine components over time if left unresolved.
How to diagnose DTC P1171 on Infiniti
- Use a scan tool to retrieve the DTC P1171 code and any other related codes
- Inspect the intake system for vacuum leaks
- Check the fuel pressure and fuel delivery system
- Test the oxygen sensor and MAF sensor
- Inspect the fuel injectors for proper operation
How to fix DTC P1171 on Infiniti
- Repair any vacuum leaks in the intake system
- Replace the fuel filter if clogged
- Check and replace a weak fuel pump if necessary
- Replace a faulty oxygen sensor or MAF sensor
- Clean or replace fuel injectors if found to be faulty
How to erase DTC P1171 on Infiniti
- After fixing the underlying issue causing DTC P1171, use a scan tool to clear the code
- Ensure that the repair has resolved the problem before clearing the code
- Drive the vehicle to allow the system to retest and verify that the code does not return
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