Error code
OBD2 P2420
OBD2P2420
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Evaporative Emission System Switching Valve Control Circuit High.
Severity
moderateCan be driven but may cause emissions issues and potential fuel vapor leaks.
Summary
The P2420 code indicates an issue with the evaporative emission (EVAP) switching valve control circuit, specifically that it is reading too high due to a wiring problem.
Common Causes
- Wiring short to positive
- Faulty EVAP switching valve
Fixes
- Replace the faulty EVAP switching valve or repair the wiring issue.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P2400Evaporative Emission System Leak Detection Pump Control Circuit/Open
- P2401Evaporative Emission System Leak Detection Pump Control Circuit Low
- P2402Evaporative Emission System Leak Detection Pump Control Circuit High
- P2403Evaporative Emission System Leak Detection Pump Sense Circuit/Open
- P2404Evaporative Emission System Leak Detection Pump Sense Circuit Range/Performance
- P2405Evaporative Emission System Leak Detection Pump Sense Circuit Low
- P2406Evaporative Emission System Leak Detection Pump Sense Circuit High
- P2407Evaporative Emission System Leak Detection Pump Sense Circuit Intermittent/Erratic
- P2408Fuel Cap Sensor/Switch Circuit
- P2409Fuel Cap Sensor/Switch Circuit Range/Performance
- P2410Fuel Cap Sensor/Switch Circuit Low
- P2411Fuel Cap Sensor/Switch Circuit High