T
The Coach
...Two montana's same problem? This sucks
why is my pontiac montana's check abs and check traction system lights always on?...
J
john t
the abs and the traction control lights come on because your sensors at the wheels are bad they need to be checked on a regular basis for dirt and such your first thing you should do is to have a diaq. done to find the bad sensor and have it replaced once that is done have them checked when you have your brakes inspected.
kelly_f_1999
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possible defect
type year model problems and can read about what others have said about that model of car
like
2008 pontiac montana problems
wil bring it up might be a recall or a model problem if you have two with same thing wrong
type year model problems and can read about what others have said about that model of car
like
2008 pontiac montana problems
wil bring it up might be a recall or a model problem if you have two with same thing wrong
M
Mark F
The TCS and ABS are part of the same system. One fault defeats both and turns on the warning lights. Given the type of vehicle I'd say the first thing to look for is worn front wheel bearings, for which these are notorious. The Wheel Speed Sensors are part of the hub and bearing assembly in the front so a loose bearing will cause a sensor failure.
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D
dakilner
Mark F is right on the money, have a diagnostic done. You can pay the dealer / local shop or simply go to a local auto parts store that has a code reader that will work on your van and have them pull the diagnostic code out of your computer (it is typically free service from the store to get you to buy your parts there) and look up the code on the internet. From this code you will be able to tell which wheel the sensor code is coming from. Whether the sensor is bad or the bearing the fix is the same, the bearing assembly must be replaced. If you are limber enough and have the proper tools the fix can be done in a resonable amount of time by you.
ianmcdca
New member
These sensors are inside the bearing...they are not cleanable. Looking at them won`t determine which is bad....unfortunately you can`t go cheap on this. Have it scanned for ABS problems. I wouldn`t spend money on parts until I new which wheel bearing was responsible. On mine it was actually a rear wheel bearing.....very rare.
Theres another post that someone got the same symptoms with a BURNED OUT TAIL LIGHT
Can't believe that but with GM engineering who knows. I still suspect the module under drivers dash.
Can't believe that but with GM engineering who knows. I still suspect the module under drivers dash.
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ianmcdca
New member
I dont understand why you are doubting us??? I know it`s not cheap to have it scanned, but it`s also not cheap to replace a BCM either....
I own 5 GM vehicles. I`ve never yet had an ABS and Trac light on that wasn`t one of the wheel bearings gone bad (Ive had a problem with the ABS unit itself causing both lights to light). It`s possible that the BCM is defective, but until someone scans it, how will you know? If the BCM is bad it will show on the scanner. YOU CANNOT VISUALLY CHECK THE SENSORS IN THESE HUBS! They are 'sealed' inside the bearing assembly. Dirt on the outside if the housing means little.
Once again, a pocket/hand held scanner WILL NOT scan for ABS or SRS problems.
I hope you find your solution.
Ian
Last edited:
planenut_2000
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I'm a ex GM dearship mechanic. Have it scanned! It is almost entirely a wheel bearing/sensor problem, or wire harness to the sensors.
Just a quick one to tag along.
Same signs and symptoms. So! Wheel bearing doesnt seem like that bad of a deal. I tried listening to see what side is N/S but since I came back from Afghanistan, my hearing is not that great.
Is there some way to determine which bearing is N/S? When the scanner is hooked up will it tell me if its a LH/RH bearing? I just dont want to buy the wrong one.
With that. Ive looked into a few parts suppliers. About $120 CDN here for the bearing. Not bad imho, but they ask if mine is the plastic clip or the metal clip?
How can I determine this?
2001 Montana LWB, Fully loaded w/air suspension. 264000kms. Goin strong, even if there are no rocker panels left!
Same signs and symptoms. So! Wheel bearing doesnt seem like that bad of a deal. I tried listening to see what side is N/S but since I came back from Afghanistan, my hearing is not that great.
Is there some way to determine which bearing is N/S? When the scanner is hooked up will it tell me if its a LH/RH bearing? I just dont want to buy the wrong one.
With that. Ive looked into a few parts suppliers. About $120 CDN here for the bearing. Not bad imho, but they ask if mine is the plastic clip or the metal clip?
How can I determine this?
2001 Montana LWB, Fully loaded w/air suspension. 264000kms. Goin strong, even if there are no rocker panels left!
Steelcity
Member
who needs rockers ? Just gives you better ground clearance .
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ianmcdca
New member
Professional scanner will tell you exactly which of the 4 sensors is bad.
You can`t always tell which sensor is bad by listening as the bearing itself may be fine, but the sensor is bad. But.......
If it`s a front bearing, you may find a bit of play in the wheel if you lift the front end and wobble the wheel in all directions. If theres play, it could be either a ball joint, tie rod end or bearing. It`s hard for most people to tell which one it might be so it`s not a great way of determining which bearing is bad....
Now, my advice on bearings. You get what you pay for! You can get bearings for $43 CDN each....not sure how long they will last though! From my experience with the taxis, I recommend you spend the money on either SKF or National. Canadian Tire sells the National brand. But, the last National brand bearing only lasted me 120 000KMS (1 year replacement warranty) whereas the SKF lasted 260 000KMS!
If you do the work yourself, you could try the cheap ones....that way, if they give out at 50 000KMs, it`s no big deal for you to replace them.
Here`s the link:
http://cgi.ebay.ca/2001-PONTIAC-MON...r_Truck_Parts_Accessories&hash=item255f641939
Just so you know, I bought a $120 bearing from Canadian Tire that lasted me only 36 000Kms....
Ian
Wire harness
My ABS / AWD light come on every year, seemingly at the beginning of winter. My car always sits outside, and I have gone through at least 4 harnesses on each front wheel. The lines always seem to break in the cold. I have yet had to do the bearings, but my van only has 135K on the OD. These harnesses can be replaced yourself,, I have even been able to repair the broken wires but that did not last too long.
My ABS / AWD light come on every year, seemingly at the beginning of winter. My car always sits outside, and I have gone through at least 4 harnesses on each front wheel. The lines always seem to break in the cold. I have yet had to do the bearings, but my van only has 135K on the OD. These harnesses can be replaced yourself,, I have even been able to repair the broken wires but that did not last too long.
Steelcity
Member
How do they break ? Rocks flying at them or salt or corrosion ?Where do they break at near the plastic connector from the harness and the bearing ?
Check the connections for each speed sensor. If there is no contact those lights will come on. I learned this the hard way. I had a bearing disentagrate doing 75 on I80 through Iowa. Sheared all five lug nuts off. Sometimes it can be the simple things.
Jeremy
Jeremy
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I have a similar problem with ABS/brake lights. On from teh second you turn the engine over. I had it scanned by 3 auto parts stores and a mechanic before someone was able to get a code from my 1998 transsport. Finally revealed a code C1246 - Rear ABS channel will not move. A previous diagnostic said no data from any wheel speed sensors. I suspect its the EBCM unit under dash. Does the EBCM need to be re-programmed after i replace with a junk yard unit?
Ok, so I can't find the message I posted earlier today, but I really need to respond to that comment about why are you being doubted.
My 2005 Montana has the same problems with ABS & TC described here and in other posts. The codes have been read, the wheel bearings have been replaced, the wiring has been replaced. The problem is steadily getting worse no matter what is done.
Now the ABS and/or TC is activated just by stepping on the accelerator. Sometimes sounds like it's activated when I start the engine! Stopping, starting gently - it's activated. More authoritative acceleration or stopping? Activated. Clean dry and level pavement. Activated.
And inconsistently to boot; but now happening every day several times as I accelerate and slow down - not at driving speeds, thank goodness. And sometimes the lights are on telling me to service TC & ABS and I'm grateful because then they're offline and not a problem. I've never had a problem like this with any vehicle I've owned -- or with my 2000 Montana. But this one is a problem - which started at around 30k miles. That's not a lot of miles...
I trust my mechanics who have been trying to fix the problem but everything they do has no effect!
Corvette95
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My ABS AWD Disable light came on today, that makes four times in two days. Came on right at start up. I can cut off the van and restart and 9/10 times it wont come back on and will not come back on until next random start up. I took it in today and had it scanned. Showed Right front speed sensor. I took it in with the light on and made them scan it before I turned it off, after restart it did not come back on and the sensor/bearing ohm'd good and the tech said the bearing and wiring harness has recently been replaced. They didnt charge me for the the code read since they could not figure out why it is coming on. My 03 Montana AWD just turned 114k miles, any thoughts?