95 blazer Engine check light

[spblend]

Ive got a 95 blazer with 171,000km on it, and the check engine light has come on about 3 times in the past few days. The last time it came on, it stayed on and still is on, yet the engine sounds practically no different, its quite confusing. I'm wondering if anyone out there is either havin the same issues or had them, or just may know what i can do about this. My only thought would be an oxygen sensor possibly but im totally stumped. Any ideas or tips would be greatly appreciated.

- Jesse

[imnprsd]

Time to get the engine codes checked.... No sense guessing at what the SES light means when you can go to Auto Zone and have it checked for free....

My guess is:

-- O2 sensor (The one behind the Cat went out on mine)
-- EGR Valve (This is a very fussy engine with respects to the EGR)

....but let us know what you discover. BTW, was there a change in your gas mileage or performance?

[BlazerLT]

Originally Posted by spblend

Ive got a 95 blazer with 171,000km on it, and the check engine light has come on about 3 times in the past few days. The last time it came on, it stayed on and still is on, yet the engine sounds practically no different, its quite confusing. I'm wondering if anyone out there is either havin the same issues or had them, or just may know what i can do about this. My only thought would be an oxygen sensor possibly but im totally stumped. Any ideas or tips would be greatly appreciated.

- Jesse

Get the codes scanned and find out what codes come up.

Don't do anything until you know them.

[spblend]

In response to wether my mileage or performance decreased or changed in n e way...... Im not too sure, nothing hugely noticable if there was, cause like i said befre, the engine is practically normal, the way it was before the light came on..... Anyways, in respects to fuel efficiency, they arent very fuel efficient these vortecs, haha, bottomless belly if u ask me.

On a similar note however, bein not so knowledgeable of cars to begin with, im always wonderin what is maybe a cheap or simple way to gain some extra horsepower out of my blazer. Just lookin for maybe some simple tips or somethin to boost her a little if i can. The blazer i haev is a 1995 Blazer LT 4 Door 4x4

Anyways, anything helps, thanks for the help guys I more than appreciate it!

- Jesse

[BlazerLT]

Let's focus on the engine problem first and move on from there.

[spblend]

I live in Vancouver, BC, CANADA. So as for goin to auto zone and finding out the codes thats somethin i cant do, but what i do plan on doin is goin down to the GM dealership and seein what they say.

[BlazerLT]

Originally Posted by spblend

I live in Vancouver, BC, CANADA. So as for goin to auto zone and finding out the codes thats somethin i cant do, but what i do plan on doin is goin down to the GM dealership and seein what they say.

Or go to a shop with a snap on scanner and have them do it.

Just don't pay too much.

Should only cost about 30-40 to have the ECM scanned and while you are at it, you might as well have them update you computer firmware with the latest fixes.

[Rick Norwood]

Originally Posted by spblend

I live in Vancouver, BC, CANADA. So as for goin to auto zone and finding out the codes thats somethin i cant do, but what i do plan on doin is goin down to the GM dealership and seein what they say.

Unless you have no other choice, I'd stay away from the Dealership unless you really want to spend some big bucks. I'm sure in a city as big as Vancouver, you should be able to find a reputable garage to read the codes for you. If you can get the codes, write them down and post them back here on this Forum and see if we can help you.

[BlazerLT]

Originally Posted by Rick Norwood

Unless you have no other choice, I'd stay away from the Dealership unless you really want to spend some big bucks. I'm sure in a city as big as Vancouver, you should be able to find a reputable garage to read the codes for you. If you can get the codes, write them down and post them back here on this Forum and see if we can help you.

Canada doesn't have the huge price giuging like they do in the states.

Mine cost $40 CDN and they also updated the software for me.

[Rick Norwood]

Originally Posted by BlazerLT

Canada doesn't have the huge price giuging like they do in the states.

Mine cost $40 CDN and they also updated the software for me.

Wow! Too bad I live 2000 miles away from the Canadian border. Local dealerships will usually want to charge you a scope fee of Approx. $60.00 - $80.00 USD to even look at your truck.

[spblend]

Hey, Ive checked into gettin the codes read and its crazy, the price difference all over the place, canadain tire $120 dealership $99 my local garage $45!! So im gettin the codes read monday, and then we'll see from there. In the meantime, Ive continued to drive it, with it still sounding no diff, totally normal, so i assume its just a dead or malfunctioning sensor. Anyways, we'll see and when i do get them read ill be sure to post up the codes for ya to check out, and let u know the final outcome.


- Jesse

[BlazerLT]

Originally Posted by spblend

Hey, Ive checked into gettin the codes read and its crazy, the price difference all over the place, canadain tire $120 dealership $99 my local garage $45!! So im gettin the codes read monday, and then we'll see from there. In the meantime, Ive continued to drive it, with it still sounding no diff, totally normal, so i assume its just a dead or malfunctioning sensor. Anyways, we'll see and when i do get them read ill be sure to post up the codes for ya to check out, and let u know the final outcome.


- Jesse

Get the dealer to do it and have them update your computer software.

Worth the money.

[spblend]

Yeah, the reason im not goin to bother with goin to the dealer is because they quoted me that to get the codes checked is 99$ and then to update the software is ANOTHER 99$. That puts me in bout 200 plus dollars. So right now im just gettin fixed what needs to be and then ill take it from there....

- Jesse

[BlazerLT]

My Chev dealer upgraded the programming and checked the computer for CDN$83.

I would shop around a bit at another dealer.

[spblend]

So Ive finally got it into the shop and back again..... Had the codes read.

Turns out to be 5 codes, 4 relating to the front O2 sensor, one to the back O2 sensor. So I went ahead and got the upstream O2 sensor replaced with a new one from ACDelco, the check lights gone out and the garage has said the light may come back on, if it does, its probably to do with the O2 sensor behind the cat. Should the light come back on, Im entitled to return to the garage at no cost and have my codes read.

Anyways, problem solved. Incase someone was interested in the code numbers here they are:

P0133
P0134 ____ All of these relating to the
P0135 upstream O2 Sensor.
P0141

P1133 ____ This one relating to the O2
sensor behind the cat.


Aside from all this, thanks alot for your interest and tips everyone.

Your help and attention is greatly appreciated!


- Jesse