2002 SL2 Air Pump and EGR
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Junior Member
Joined: Jan 2025
Posts: 4
2002 SL2 Air Pump and EGR
Greetings Saturn Brethren.
I find myself using saturn SLs as daily drivers. It's a habit I've fallen into over the last 15 years and at this point I have surrendered to it. I find myself with a very unhappy 2002 SL2 and have come to beg for guidance. When I started it up after sitting for a while, it struggled to turn over and I got a huge white cloud of exhaust. I did a code dump and have P0133, P0410 and P0440. Before I started tackling these one by one I wanted to ask if this could all have a common cause. Sorry to charge in with questions :-/
Thanks for your help!
I find myself using saturn SLs as daily drivers. It's a habit I've fallen into over the last 15 years and at this point I have surrendered to it. I find myself with a very unhappy 2002 SL2 and have come to beg for guidance. When I started it up after sitting for a while, it struggled to turn over and I got a huge white cloud of exhaust. I did a code dump and have P0133, P0410 and P0440. Before I started tackling these one by one I wanted to ask if this could all have a common cause. Sorry to charge in with questions :-/
Thanks for your help!
Super Moderator
Joined: Jul 2005
Posts: 12,316
From: Slightly off center
If you know it failed, replace it, clear the codes, drive it and see what comes back.
We can guess til the cows come home (if they even do) but it doesn't change the next step so replace it and then we'll know
😉
We can guess til the cows come home (if they even do) but it doesn't change the next step so replace it and then we'll know
😉
Last edited by derf; Jan 20, 2025 at 03:14 PM.
Super Moderator
Joined: Apr 2015
Posts: 3,229
From: Willamette Valley, Oregon
Does the electric air pump run on cold start now? I have the same system on my 2002 L200/5. I have also had to replace the check valve.
check valves let exhaust flow back into the pump and can damage them. The pcm looks for pump operation and solenoid action to help cold start cat warmup. The system is designed to get the car in closed loop as soon as possible. The check valve failure may have damaged both the pump and the solenoid.
check valves let exhaust flow back into the pump and can damage them. The pcm looks for pump operation and solenoid action to help cold start cat warmup. The system is designed to get the car in closed loop as soon as possible. The check valve failure may have damaged both the pump and the solenoid.
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