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 1500
Average mileage: 122,517 (26,000–282,700)
Exhaust & Emissions affected: Gasoline
31 people reported this problem
11 people shared problem details
check engine light - digital trouble code P0449 says a malfunction of vent solonoid valve and my on board dash says i have a loose gas cap - has this been a common problem? this vehicle has 56,000 miles
Mine was the right side air check valve. $35 & an easy fix.
1999 Chevrolet Silverado 1500112,556Visitor
vehicle has a miss in the engine, when it rain the miss in the engine get worse,when riding about 70mph the engine jerks,at stop lights the vehicle surge forward.
engine light keeps going on and off on occasion... no loss of power, but its annoying to pay over $100.00 to be told there is nothing wrong with the truck...
2006 Chevrolet Silverado 150026,000Visitor
engine light comes one, I take it to the dealer and they don't know what's wrong. they shut it off and a few days later it come on. I don't take my truck to the dealership.
2001 Chevrolet Silverado 150094,000Visitor
P1416 DTC code "Check engine light on"
2001 Chevrolet Silverado 1500250,000Visitor
Service engine soon light went on. Took it to Pep Boys. Diagnosed that both air injection valves were bad. Being the start of the Labor Day weekend I opted to get it fixed and not wait. They charged me $121.17 a piece for the two valves. Was running fine before, and running fine now but without the check light on. If I had known that I could have waited and driven my truck without causing damage I would have put off the repair and shopped for a better, much better price on the parts. The problem did not effect the driveability of the truck, but at this age and milage I kind of get spooked about letting anything go for any time. Last month I ignored the check light for a week waiting for a better day, and the fuel pump gave out at an intersection. Argh!
my truck dyies while i am driving
Check eng light came on and can't get it to go off on 2005 Chevy Silverado 1500. Have replaced gas cap, canister and Holes Lines, filters,
2007 Chevrolet Silverado 1500150,000Visitor
runs well when first stsrted then it will misfire after i go around the block, and the check engine lt. comes on
originally, light came for check engine, replaced spark plugs replaced 4 of the igniter coils r...
After jump starting my vehicle the check engine light and the reduced engine power light came o...
About 35000 miles, check engine light came on. Dealership repaired. Stated a sensor on top of g...
A Loose or worn gas cap may cause Check Engine Light to illuminate.