Check Engine Light Due to Restricted Secondary Air Injection Check Valves: Pontiac GTO Muffler & Exhaust

Problem overview

One or both secondary air injection check valves may become restricted causing poor air flow resulting in illumination of the Check Engine Light. It is often recommend to replace both check valves even if a fault code is set for only one bank of cylinders. Replacing only one valve may result in a return trip to the repair shop.

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Pontiac GTO vehicles with this problem

3 model years affected

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Check Engine Light Due to Restricted Secondary Air Injection Check Valves on Pontiac GTO

Problem overview

Pontiac GTO vehicles with this problem

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