Error code
OBD2 P2440
OBD2P2440
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Secondary Air Injection System Switching Valve Stuck Open.
Severity
moderateCan be driven but may cause increased emissions and potential damage to the catalytic converter.
Summary
P2440 indicates that the secondary air injection system switching valve on bank 1 is stuck open, affecting engine emissions.
Common Causes
- Wiring issues
- Valve malfunction
Fixes
- Replace the secondary air injection system switching valve.
FAQ
What does P2440 mean?
P2440 indicates that the secondary air injection system switching valve on bank 1 is stuck open.
How serious is this issue?
It's moderately serious. The car can still be driven but may cause increased emissions and potential damage to the catalytic converter over time.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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- 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