P0417 Code - Secondary Air Injection System Switching Valve 'B' Circuit Shorted

What Does P0417 Mean?

An air pump is used on the vehicle to lower tail pipe emissions on start-up. The Powertrain Control Module (PCM) grounds the Air pump relay control circuit which energizes the Air pump. The PCM also grounds the Air combination valve vacuum control solenoid circuit, which energizes the Air vacuum control solenoid. Vacuum is then applied to both Air combination valve diaphragms which opens the shut off valves. The PCM enables both circuits simultaneously when Air system operations id desired. When the AIR system is active, then Air pump forces fresh air into the exhaust stream in order to accelerate catalyst operation. The AIR combination valves replace the conventional check valves. When the AIR system is inactive the shut off valves prevent air flow in either direction.

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What are the common causes of P0417 ?

• Faulty IMRC actuator/sensor
• A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.
• Defective ECU strategies or components will prevent proper regeneration

How do you troubleshoot P0417 ?

• Repairing or replacing the air bypass harness and/or its connectors
• Repairing or replacing any damaged or faulty wiring in the circuit
• Replacing the air pump

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