P0174high
Understanding Code P0174: System Too Lean (Bank 2)
Code P0174 indicates that the engine control module has detected a lean condition in bank 2 of the e...
Published 4/7/2026
P0171high
Understanding Code P0171: System Too Lean (Bank 1)
Code P0171 indicates that the engine's air-fuel mixture is too lean on Bank 1, which can lead to per...
Published 4/7/2026
P0301high
Understanding Code P0301: Cylinder 1 Misfire Detected
Code P0301 indicates a misfire in cylinder 1, which can lead to engine performance issues. This arti...
Published 4/7/2026
P0300high
Understanding Code P0300: Random/Multiple Cylinder Misfire Detected
Code P0300 indicates a random or multiple cylinder misfire, which can lead to significant engine per...
Published 4/7/2026
P0420moderate
Understanding Code P0420: Catalyst System Efficiency Below Threshold (Bank 1)
Code P0420 indicates that the catalytic converter's efficiency is below the expected threshold for B...
Published 4/7/2026