Diagnostic Trouble Code
P2097 — Post Catalyst Fuel Trim System Too Rich Bank 1
Post Catalyst Fuel Trim System Too Rich Bank 1
Definition
The post-catalyst fuel trim on Bank 1 is indicating a rich condition. The downstream O2 sensor is detecting excess hydrocarbons in the exhaust after the catalytic converter.
Common Causes
- Faulty downstream O2 sensor
- Catalytic converter degradation
- Persistent rich condition from upstream
- Exhaust leak