P0171 and P0174 – System Too Lean
P0171 and P0714 | Expert Guide | Detailed Explanation | Meaning | Causes | Symptoms | Diagnostics | How to Fixes | How to Avoid in the Future.
OBD Codes
Get detailed guides to the definition, meaning, symptoms, causes, diagnosis, and how to fix OBD2 codes. In this category, you can also find OBD1 codes of Ford, GM, etc.
P0420 – Catalyst system efficiency below threshold
The OBDII diagnostic code P0420 is one of the most common seen by mechanics. Want to know what causes this error code and how to fix it? We’ll break it down in full detail for you here.
P0169 – Incorrect Fuel Composition
Filling up a car’s fuel tank with wrong fuel is a common mistake people do on the fuel stations. P0169 is the most widely used OBD2 DTC code for wrong fuel composition.