P2440 Diagnostic Trouble Code Discussion for December 2009
Secondary Air Injection System Switching Valve Stuck Open
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| Help Request | Posted | |
| 2005 Buick LaCrosse CX 3.8L MIL Lamp on VIN: 2G4WC53275 P2440: Secondary Air Injection System Control/Shut-Off Valve Stuck Open. Has Mil open, clear and always returns. Replace Valve and checked pipe to exhaust. No change. Pump works. Valve opens when commanded with scan tool. |
December 09, 2009 | |
| 2005 Buick LaCrosse CX 3.8L MIL Lamp on VIN: 2G4WC53275 P2440: Secondary Air Injection System Control/Shut-Off Valve Stuck Open. Has Mil open, clear and always returns. Replace Valve and checked pipe to exhaust. No change. Pump works. Valve opens when commanded with scan tool. |
December 25, 2009 |
