2004 GMC ENVOY Service engine soon light code P0410. I HAVE CHANGED THE VALVE SOLENOID CHECK THE FUSE FOR THE SOLENOID. CHANGED THE AIR PUMP AND THE RELAY FOR THE AIR PUMP. BUT THE PUMP STILL DOESN'T TURN ON.
Question = WHAT ELSE IS THERE TO CHANGE TO MAKE THAT AIR PUMP TURN ON. I TOOK IT TO SEVERAL MECHANICS AND THEY CANT FIGURE IT OUT. PLEASE LET ME KNOW WHAT YOU THINK. (I HAVE CHANGED THE VALVE SOLENOID CHECK THE FUSE FOR THE solenoid. CHANGED THE AIR PUMP AND THE RELAY FOR THE AIR PUMP. BUT THE PUMP STILL DOESN'T TURN ON.
Answer: There is also a fuse for the pump. If that fuse is ok, then the next thing to check for is that there is power at the pump relay, then ground the relay to turn on the pump. If you can manually turn on the pump, then the problem may be with the pcm.
The pump relay grounds controlled by the pcm. When you say that the pump never comes on, i assume you are using a scanner that can control the pump. The pcm will only turn on the pump under certain conditions. A scanner that can control the pump can turn it on anytime. The p0410 is set under curtain circumstances, and it monitors the #1 02 sensor to determine if the system is functioning properly, and decide to set a code.
Check engine light - Also known as the SERVICE ENGINE SOON or SES light. This indicates a malfunction in the engine control and emissions systems of your car. Step by step instructions on how to do a simple scan to check for computer trouble codes. These codes give an indication as to what system is having a problem.
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Same Issue here, Pump, fuse relay and hoses all changed 500 dollars later still on changed bank 1 and bank 2 o2 sensor still nothing whats next...
Had the same code on my truck. Dealer ended up finding a bad diverter valve on the passenger side of the engine. Sort of looks like an EGR valve. Replaced that and no more check engine light.
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