Powertrain
Definition only
Lights the check engine lamp
P2408: Fuel Cap Sensor/Switch Circuit Range/Performance
Standardized SAE J2012 code · P24xx — Auxiliary emission controls
What does P2408 mean?
On vehicles with a sensed fuel cap, the cap-status signal is electrically valid but does not change as expected when the cap is opened or closed.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Common causes
- High Cap switch worn
- Medium Cap seal aged, switch never seats
- Low Sensor element aged beyond calibration window
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2408 on the same make and model first.
P2408 in the community
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