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Chevrolet Blazer Trouble Codes

65 messages,  Last post on Oct 28, 2009 at 5:12 PM

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#1 of 65 2001 blazer trouble code by caa101 Feb 28, 2007 (8:34 am)
My blazer is reading a PO128 code for check engine light.Does anyone know what that is? Replies to this message: jlflemmons (Feb 28, 2007 10:38 pm)
#2 of 65 Re: 2001 blazer trouble code [caa101] by jlflemmons Feb 28, 2007 (10:38 pm)
Replying to: caa101 (Feb 28, 2007 8:34 am) I believe that is in the coolant temperature monitoring circuit. Maybe a bad temp sensor?
#3 of 65 2001 blazer temp sensor location by atenciolm Mar 02, 2007 (2:43 pm)
My Blazer had a smog test and it did not pass because of the temp sensor (coolant sensor p0128 code) we purchased the part and need to find out where it is located so we can change it. thanks for any help Replies to this message: repairdog (Mar 03, 2007 6:00 pm) rubisco (Apr 24, 2007 9:43 am)
#4 of 65 Re: 2001 blazer temp sensor location [atenciolm] by repairdog Mar 03, 2007 (6:00 pm)
Replying to: atenciolm (Mar 02, 2007 2:43 pm) Drivers side under hood between the rear 2 plugs - see the connector attached to it. You will lose coolant when removed so make sure you refill. Replies to this message: rubisco (Apr 24, 2007 9:43 am)
#6 of 65 "New" '95 Blazer with some problems - codes by rubisco Apr 23, 2007 (12:30 pm)
Hey All, my first post here!   So I have 2 '95 Blazers. My old one I've had for eons and although it's had some of the regular problems I like it very much. So I pick up another and it's throwing some codes but running good. They are P0326, P0441 and P1406. Now I know that 0326 is knock sensor performance and 0441 is no flow during evap purge cycle, but I'm not sure what 1406 is for. It's not in my haynes manual and I can't find much on the web for it. Some have said it's a bank 1 post cat O2 sensor thing.   Ok, I was changing the cap and rotor and noticed that some knuckle head broke off the rear stay for the dist cap screws. So I have 2 wood clamps on there. Could this set off the knock sensor? Or do these just go bad and need replacing? I'm not sure where it is if it needs replacing.   I don't know much about how the evap system works, but I heard there is a valve somewhere that can be replaced and also a canister. Otherwise this smoke test a shop can do. I just don't know where the valve and canister are located. Any ideas?   The 1406 code?   I guess I should add that the EGR valve was getting all gunked up with carbon pellets so I took the plenum off and cleaned it up real good and thoroughly cleaned the passages to and from the EGR. Then I put on a filtered gasket to stop any more pellets from getting stuck. I read somewhere that it could be that the IAC needs a cleaning too (?). I've run a bottle of seafoam through the tank and the intake and it idles very very smooth now. Replies to this message: repairdog (Apr 24, 2007 2:21 am) gorbey (Sep 09, 2008 8:19 am)
#7 of 65 Re: "New" '95 Blazer with some problems - codes [rubisco] by repairdog Apr 24, 2007 (2:21 am)
Replying to: rubisco (Apr 23, 2007 12:30 pm) 1406 is EGR. That evap can is rear drivers side way back behind the rear wheel under that shield. Replies to this message: gorbey (Sep 09, 2008 8:19 am)
#8 of 65 Re: 2001 blazer temp sensor location [repairdog] by rubisco Apr 24, 2007 (9:43 am)
Replying to: repairdog (Mar 03, 2007 6:00 pm) Thanks very much man. I'll take a good look at both of those and post if I still have a problem. You seem like an extremely knowledgable guy. Thanks again.
#9 of 65 2003 Chevy Blazer by sgnobod2000 Jun 23, 2007 (6:10 pm)
I just recently got my service engine soon light coming on. I thought originally it was bad gas because it was right after I got gas, within 15 minutes. After my store stop I added the same amount of gas from a different station. Light stays on. runs ok. Is there a manual way to get the codes on this vehicle or do I need a reader. I know my other vehicles you had to do a succession of key off etc. I would appreciate any help. Replies to this message: repairdog (Jun 24, 2007 3:32 am)
#10 of 65 Re: 2003 Chevy Blazer [sgnobod2000] by repairdog Jun 24, 2007 (3:32 am)
Replying to: sgnobod2000 (Jun 23, 2007 6:10 pm) No, need a code reader and Advance and AutoZone read for free as well as many other local stores (in hopes of selling you parts). Read it out and maybe just a simple loose cap so write the code down and have them erase it and see if it returns.

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