P2440 Diagnostic Trouble Code Discussion for January 2012
Secondary Air Injection System Switching Valve Stuck Open
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| Help Request | Posted | |
| 2008 Isuzu Ascender S 4.2L MIL Lamp on VIN: 4NUDS13S38 P2440: SA shut off valve stuck open. I have an Ascender (trail blazer , envoy) with above codes. I have disconnected the hoses at the air cleaner and solenoid valve, started engine and have plenty of air flow. When i activate the pump and the valve the o2 voltage drops to 0V. I do not find a pid ... |
January 02, 2012 |
