OBD-II code · Powertrain (generic, extended)
P2409 Fuel Cap Sensor or Switch Circuit Range or Performance
The sensor or switch that detects whether the fuel cap is properly closed reports a value within plausible range yet not matching driver action.
Is it safe to drive with P2409?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyContact drifted or dirty
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–1 h
- Emissions test
- Likely to fail
- Parts involved
- Fuel Cap Sensor
Related codes
- P2406EVAP System Leak Detection Pump Sense Circuit High
- P2407EVAP Leak Detection Pump Sense Circuit Range/Performance
- P2408Fuel Cap Sensor/Switch Circuit Range/Performance
- P240AEVAP System Leak Detection Pump Heater Control Circuit Open
- P240BEVAP System Leak Detection Pump Heater Control Circuit Low
- P240CEVAP System Leak Detection Pump Heater Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.