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.
Check Engine Light Due to Restricted Secondary Air Injection Check Valve on Chevrolet Silverado 2500
Average mileage: (–)
Exhaust & Emissions affected: Gasoline
6 people reported this problem
0 people shared problem details
The engine may develop a misfire due to worn valve seats. This fault will cause the Check Engin...
Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/...
The daytime running lights are prone to burning out. Our technicians tell us that the light s...