Check Engine Code
P2096
Post-Catalyst Fuel Trim System Too Lean (Bank 1)
What P2096 means
P2096 uses the downstream O2 sensor to judge fuel trim after the catalyst. If it's reading lean consistently, either there's an exhaust leak or the sensor has drifted.
Symptoms
- Check engine light
- Possibly paired with P0420 or P0171
Likely causes (most common first)
- Exhaust leak downstream of the upstream O2 sensor
- Worn downstream O2 sensor
- Failing catalytic converter
Can I keep driving?
Low — mostly emissions/economy
Typical repair cost
DIY fixes can start near $40 (parts only). Shop repairs for P2096 typically run up to $400 depending on the underlying cause and vehicle. Start with the most common cause — Exhaust leak downstream of the upstream O2 sensor — before throwing parts at it.
Recommended parts & tools for P2096
Our buyer’s guides cover the tools and parts that pair with AXLY:
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