Powertrain
Definition only
Lights the check engine lamp
P2409: Fuel Cap Sensor or Switch Circuit Range or Performance
Standardized SAE J2012 code · P24xx — Auxiliary emission controls
What does P2409 mean?
The sensor or switch that detects whether the fuel cap is properly closed reports a value within plausible range yet not matching driver action.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Contact drifted or dirty
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2409 on the same make and model first.
P2409 in the community
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