Quote:
Originally Posted by Jamesp
P0491 and P0492, secondary air system bank 1, secondary air system bank 2 :troll:
The electric air pump runs with a durametric
The car runs great
2003 S 6 speed
The engine was recently rebuilt from the crank out and the passages to the exhaust manifold were completely cleaned
Any idea how to troubleshoot the system or which part or condition might be the likely culprit?
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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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