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Old March 16th, 2014, 08:52 AM   #2
JFP in PA
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Join Date: Dec 2003
Location: It's a kind of magic.....
Posts: 93
Quote:
Originally Posted by mscottfree View Post
Can anyone help me with the following codes?

DIAGNOSTIC CODE. P0491 SECONDARY AIR INJECTION SYSTEM BANK 1 AND P0492 SECONDARY AIR INJECTION SYSTEM BANK 2 CONFIRMED.



P0491 Secondary Air Injection System, Bank 1 - Insufficient Flow P0492 Secondary Air Injection System, Bank 2 - Insufficient Flow Possible cause of fault - Electrical fault in power supply or line between relay and secondary air injection pump - Secondary air injection pump relay mechanically faulty - Mechanical fault in electrical secondary air valve - Pneumatic secondary air valve faulty/sluggish - Electrical fault in secondary air injection pump - Mechanical fault in secondary air injection pump or secondary air injection pump blocked - Vacuum system leaking - Air hose to secondary air injection pump slipped off or constricted
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