P2430 to P2447 and P2257 to P2260: secondary air sensors, valves, pump and control
The air flow or pressure sensor of the secondary air system, on bank 1 or 2, has a circuit fault or an implausible reading, a switching valve is stuck open or closed, the air pump is stuck on or off, or the system's control circuit A or B reads low or high.
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P2430 mean?
Where P0410 to P0419 cover the secondary air system in general, these codes add the sensor many newer systems use to measure the air actually delivered, and say which part is stuck. A pump stuck on keeps blowing air into the exhaust and wears out; a valve stuck open lets hot exhaust reach the pump and destroy it. A pump stuck off or a valve stuck closed simply raises emissions in the first minute after a cold start.
What causes P2430?
- A switching valve corroded or stuck by soot and moisture
- An air pump seized by water or worn out
- A pump relay stuck closed, keeping the pump running
- A failed air flow or pressure sensor or its wiring
- A split hose between the pump, the valve and the engine
What to check first for P2430
- Listen for the pump after a cold start: it should run for about a minute and then stop
- Check whether the pump keeps running after it should stop, which points to the relay
- Inspect the valves and hoses for soot, which shows exhaust getting back
- Have the sensor reading watched while the pump is commanded on and off
Can you drive with P2430?
You can usually drive to a workshop. If the pump runs constantly or makes a grinding noise, have it checked soon, because a pump that keeps running can overheat or blow its fuse.
In states with an OBD-II emissions inspection, a car with the check engine light on fails the test until the fault is fixed.
Codes on this page
22
- P2257Secondary Air Injection System Control "A" Circuit Low
- P2258Secondary Air Injection System Control "A" Circuit High
- P2259Secondary Air Injection System Control "B" Circuit Low
- P2260Secondary Air Injection System Control "B" Circuit High
- P2430Secondary Air Injection System Air Flow/Pressure Sensor CircuitBank 1
- P2431Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/PerformanceBank 1
- P2432Secondary Air Injection System Air Flow/Pressure Sensor Circuit LowBank 1
- P2433Secondary Air Injection System Air Flow/Pressure Sensor Circuit HighBank 1
- P2434Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/ErraticBank 1
- P2435Secondary Air Injection System Air Flow/Pressure Sensor CircuitBank 2
- P2436Secondary Air Injection System Air Flow/Pressure Sensor Circuit Range/PerformanceBank 2
- P2437Secondary Air Injection System Air Flow/Pressure Sensor Circuit LowBank 2
- P2438Secondary Air Injection System Air Flow/Pressure Sensor Circuit HighBank 2
- P2439Secondary Air Injection System Air Flow/Pressure Sensor Circuit Intermittent/ErraticBank 2
- P2440Secondary Air Injection System Switching Valve Stuck OpenBank 1
- P2441Secondary Air Injection System Switching Valve Stuck ClosedBank 1
- P2442Secondary Air Injection System Switching Valve Stuck OpenBank 2
- P2443Secondary Air Injection System Switching Valve Stuck ClosedBank 2
- P2444Secondary Air Injection System Pump Stuck OnBank 1
- P2445Secondary Air Injection System Pump Stuck OffBank 1
- P2446Secondary Air Injection System Pump Stuck OnBank 2
- P2447Secondary Air Injection System Pump Stuck OffBank 2
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
