P2097
PowertrainFuel Air Meteringmoderate severityPost Catalyst Fuel Trim System Too Rich (Bank 1)
What P2097 Means
The downstream oxygen sensor detects the exhaust running too rich after the catalytic converter. This often stems from excess fuel or a faulty sensor reading.
Symptoms
- Check engine light on
- Black smoke or fuel smell
- Poor fuel economy
Common Causes
- Leaking or stuck-open fuel injector
- High fuel pressure
- Faulty downstream oxygen sensor
- Contaminated or failing catalytic converter
Diagnostic Steps
- Scan and review fuel trim values
- Check fuel pressure against spec
- Inspect injectors for leakage
- Test downstream O2 sensor response
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✓ Autel official store
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