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P2408: Fuel Cap Sensor/Switch Circuit

Severity
Medium
System
Powertrain
Last reviewed: Last updated:

Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.

Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).

Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.

What Does P2408 Mean?

P2408 is a diagnostic trouble code indicating: Fuel Cap Sensor/Switch Circuit. This code relates to the powertrain system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P2408

Common Causes

Frequently Asked Questions

What does P2408 mean?
P2408 indicates: Fuel Cap Sensor/Switch Circuit. The vehicle's computer has detected that the Fuel Cap Sensor/Switch is not operating within its expected parameters and stored this diagnostic trouble code.
Can I drive with code P2408?
You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P2408 for extended periods may cause additional problems.
How much does it cost to fix P2408?
Repair costs for P2408 typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

  • 🔧 Inspect and repair Fuel Cap Sensor/Switch wiring and connectors
  • 🔧 Replace faulty Fuel Cap Sensor/Switch
  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

P2400 EVAP System Leak Detection Pump Control Circuit/Open P2403 EVAP System Leak Detection Pump Sense Circuit/Open P2404 EVAP System Leak Detection Pump Sense Circuit Range/Performance P2405 EVAP System Leak Detection Pump Sense Circuit Low P2406 EVAP System Leak Detection Pump Sense Circuit High P2407 EVAP System Leak Detection Pump Sense Circuit Intermittent/Erratic P2409 Fuel Cap Sensor/Switch Circuit Range/Performance P240A EVAP System Leak Detection Pump Heater Control Circuit/Open P240B EVAP System Leak Detection Pump Heater Control Circuit Low P240C EVAP System Leak Detection Pump Heater Control Circuit High