P0410 Secondary Air System 99 Suburban
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P0410 Secondary Air System 99 Suburban
I need help with this one. I have a 99 Suburban 1500 4x4 5.7L. I am on my second air pump.
About a year ago I threw the same P0410 check engine light. I replaced the air pump and all was good. The code stayed away. Fast forward a year. Code comes back. I've read a lot about this issue over the last month or so. I realize that these pumps seem to go bad for whatever reason. Keep in mind I live in San Jose California. It's not humid here, it doesn't snow and rarely rains.
So, I did as much testing of the system as I could. I checked the pump (out of the vehicle) it would not turn on. I had one bad check valve on the passenger side.
So I replaced both check valves, I replaced the gaskets on the metal hoses connected to the exhaust manifold. I replaced the stop valve (even though it's discontinued) with one from another GM 5.7L motor (AC Delco PN # 214-1938). I wanted to replace the relay, but when I went to buy it, the item the dealer had was a shielded model. It would not work in the fuse box in the engine bay. So, there is a relay somewhere, but NOT in the fuse box. I checked, there isn't one there. Air Pump Relay that's shielded
The code came back on after 3 days of being off. I have no idea where to go from here. I cannot locate the air pump relay. There is only one other part I can find to the system, it's where the two wire for the air pump plug plugs into, I think it's some type of actuator. It has two tiny air tubes connected to it. One of the air tubes connects to the stop valve.
I am at my wits end with this. I have no idea what to check next. I am crap with a multimeter. Any help from here would save me gray hair and hundreds of dollars at the dealer.
Thanks, Christian
About a year ago I threw the same P0410 check engine light. I replaced the air pump and all was good. The code stayed away. Fast forward a year. Code comes back. I've read a lot about this issue over the last month or so. I realize that these pumps seem to go bad for whatever reason. Keep in mind I live in San Jose California. It's not humid here, it doesn't snow and rarely rains.
So, I did as much testing of the system as I could. I checked the pump (out of the vehicle) it would not turn on. I had one bad check valve on the passenger side.
So I replaced both check valves, I replaced the gaskets on the metal hoses connected to the exhaust manifold. I replaced the stop valve (even though it's discontinued) with one from another GM 5.7L motor (AC Delco PN # 214-1938). I wanted to replace the relay, but when I went to buy it, the item the dealer had was a shielded model. It would not work in the fuse box in the engine bay. So, there is a relay somewhere, but NOT in the fuse box. I checked, there isn't one there. Air Pump Relay that's shielded
The code came back on after 3 days of being off. I have no idea where to go from here. I cannot locate the air pump relay. There is only one other part I can find to the system, it's where the two wire for the air pump plug plugs into, I think it's some type of actuator. It has two tiny air tubes connected to it. One of the air tubes connects to the stop valve.
I am at my wits end with this. I have no idea what to check next. I am crap with a multimeter. Any help from here would save me gray hair and hundreds of dollars at the dealer.
Thanks, Christian
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I just confirmed the pump IS activating/turning on. I turned on the truck, walked to the front and felt suction on the inlet tube. So I am letting the ECU discharge and see if that works. I had orginally reset the ECU with a scan tool. We'll see I guess.
I still don't understand why these pumps keep failing when the stop valve is functioning.
Christian
I still don't understand why these pumps keep failing when the stop valve is functioning.
Christian
#3
Ever figure it out?
I just confirmed the pump IS activating/turning on. I turned on the truck, walked to the front and felt suction on the inlet tube. So I am letting the ECU discharge and see if that works. I had orginally reset the ECU with a scan tool. We'll see I guess.
I still don't understand why these pumps keep failing when the stop valve is functioning.
Christian
I still don't understand why these pumps keep failing when the stop valve is functioning.
Christian
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