P2099 code indicates that the post-catalyst fuel trim system on Bank 2 is detecting a too rich fuel mixture.
P2099 Post Catalyst Fuel Trim System Too Rich Bank 2
Code symptoms P2099.
– Check Engine Light is illuminated
– Reduced fuel efficiency
– Rough idling or stalling
– Excessive smoke from the exhaust
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P2099.
1. Faulty oxygen (O2) sensor.
2. Vacuum leak.
3. Fuel pressure regulator issue.
4. Dirty or clogged fuel injectors.
5. Engine misfire.
Code Solutions P2099.
1. Inspect for any vacuum leaks in the air intake system and repair as necessary.
2. Check the operation of the oxygen sensor in bank 2 and replace if faulty.
3. Clean or replace the mass airflow sensor if dirty or malfunctioning.
4. Inspect the fuel injectors in bank 2 for clogs or leaks and clean or replace as needed.
5. Verify the functionality of the fuel pressure regulator and replace if not maintaining the correct pressure.