The P0173 trouble code indicates a malfunction in the fuel trim of bank 2. This code typically points to issues related to the air-fuel mixture being too rich or too lean in bank 2, potentially causing operational problems or damage to the engine components.
Fuel Trim Malfunction (Bank 2)
Code symptoms P0173.
1. Decreased fuel efficiency.
2. Rough idling or stalling.
3. Malfunction indicator light (MIL) illumination.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0173.
1. Vacuum leaks in the intake manifold.
2. Faulty oxygen (O2) sensor.
3. Issues with the mass air flow (MAF) sensor.
Code Solutions P0173.
1. Inspect and repair any vacuum leaks in the intake manifold.
2. Replace the oxygen (O2) sensor if it is faulty.
3. Check and clean or replace the mass air flow (MAF) sensor if necessary.