Question about 1998 Pontiac Sunfire

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Electrical failures on 98 Sunfire, 2.2

My ABS have failed and the brake warning light is on, although fluids are full and brakes work normally. At the same time, the 'check engine' light came on as well as the ABS light. At the same time, the cooling fan does not seem to come on, but this is hard to tell in mid-winter. Any help would be appreciated. Thanks.

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  • Pontiac Master
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ABS sensor : If you've been in the snow & slush lately, stop at a carwash & rinse the back side of your wheels off, front, back, over, under, as much as you can, it may be tripped due to sensor covered in dirt or slush and not giving necessary signal. As far as cooling fan coming on, let it sit & idle & watch your temp gauge. When at normal operating temperature + or - a few degrees, it should come on, but watch & see if gauge goes too high towards hot, and it doesn't come on, have fan operation checked.

Posted on Dec 28, 2008

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On my 91 cougar it sat for about 2 months due to a power steering problem I fixed that problem now my abs and brake lights stay on is it possible if I bleed all four brakes they might shut off?


"Is it possible if I bleed all four brakes they might shut off?"

If you bleed the brakes all you will do is remove any air in the brake lines and replace the brake fluid with new fluid. Do this in any event if the brake fluid is 2 yrs old or more.

This will have no affect on the ABS warning light and when the light is displayed the ABS has turned off because there is a problem with the ABS. You will not get it back on until the cause is determined and fixed which may be just a failed wheel speed sensor.

The brake warning has probably been triggered by the same failure that has caused the ABS warning light (since they came on together and bleeding the brakes should make no difference).

If the car sat for 2 months, no doubt the battery went flat. You have not mentioned anything about the battery but if your battery is in poor shape this can trigger warning lights in many cars especially the ABS (and stability control systems).

The best option is to have the vehicle scanned for fault codes that have been generated and there will be one or 2 if these warning lights are displayed. Scanning the ABS for codes will show up one or more issues and you can trace the problem from there. I think you will find the brake warning and ABS warning have been caused by the same fault.

In any event make sure you check the brake fluid level in the car and look for any external leaks of fluid that may have developed. Check the operation of your brakes to ensure they are working normally and that the brake pedal is not slowly dropping to the floor when you continue to apply pressure. Bleed the brakes if the brake fluid is 2 yrs old or more.

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2001 pontiac sunfire abs and check engine light is on. brake fluid is full and the front brakes were just changed about a month ago.


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There is a known failure of the ABS system control board which typically causes this problem. THere are companies out there that will rebuild your current board (if it's rebuildable). Do a search on ABS repair in Moscow, Iowa.

They will rebuild the module for $150.00 and warrant the repair for 5 years (as opposed to up to a $1000 form GM, and no guarantee as to how ling it will last.).

I did this to my '01 Tahoe and am real happy with it. The company offers diagnosis tests to help you determine if the problem is your ABS module.

Reply back what you find.

Feb 15, 2009 | 1998 Pontiac Sunfire

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