2003 Pontiac Sunfire Trac Off/Engine Light

Asked by Aug 15, 2011 at 11:50 AM about the 2003 Pontiac Sunfire Base

Question type: Maintenance & Repair

For the past week the trac off and engine light on my sunfire has constantly stayed lit upon starting the car and during driving. The car is running fine/driving fine, no strange sounds or anything like that. These lights came on a few days after I had new rear brakes installed. I don't know if that would have anything to do with it. Any idea on what could be the problem?

12 Answers

33,375

trac and check engine or trac off and abs. if trac off and abs light is on 99 times out of 100 its a wheel speed sensor. buy an abs brake scanner or take it to a shop. you can individually check to see if each sensor is producing voltage by removing each wheel and probing each sensor with a DVOM while spinning the hub to see if the sensor is producing voltage and yes its a huge pain. the auto traction control and abs system rely on a reading from each wheel speed sensor to know what it needs to do if you have an intermittent wheel speed sensor it will make your low trac light come on, and activate your abs. a dead sensor will turn on ur two lights. your vehicle also has a service light and a check engine light usually the service light comes on when an exterior light is burnt out so the service light would have nothing to do with your traction

7 out of 7 people think this is helpful.
1,555

Ok my Daughters Sunfire has the same issue and I replaced both front sensors and the Wires harnesses on both sides. The Wheel Bearings (Hubs) are fine with no movement for wear and no noise on the road. Could I have a bad sensor in back or the controls module is bad. The rear sensors are built into the hub. I tested the wires from rear to front and they are ok. Now the lights come on right away then some times they don't until you drive a little ways. Help

8 out of 8 people think this is helpful.
33,375

Could be the sensors in the rear, could be the wires, could be many other things. Get the codes pulled with an abs code scanner, auto parts stores sell them but don't use them for pulling codes. Either fork over the $200 for the scanner or go to a local repair shop and get the codes pulled and an estimate to fix it.

33,375

By the way if the trac off light is on but the abs and brake light are off then it's not a wheel speed sensor.

5 out of 5 people think this is helpful.
1,555

I have a Code Scanner and there are no codes? I have tested wires from back to front and they test ok? My only two options are the rear sensors or the Control Module ABS Unit. I have all three lights on ABS Track and Engine.

4 out of 4 people think this is helpful.
33,375

And no codes are popping up for the check engine or the ABS? You need a scanner designed specifically for scanning brake codes. An ordinary code scanner won't access the abs or brake codes.

1 out of 1 people think this is helpful.
60

My wife had the same issue with her sunfire, come to find out the fuse for the cooling fan was blown. I replace the fuse, the engine and traction lights turn off, then it would blow the fuse and the light came back on. I finally found that the cooling fan motor was bad which kept causing the fuse to blow. Replaced the motor, and never have had this issue again. It would never give me a code, I just happen to notice it was starting to run hot. I am still confused on why the cooling fan motor would prevent the traction control from working.

6 out of 6 people think this is helpful.

my 2001 sunfire has the same trac off light problem. the difference i am having is when the light comes on the car will not shift and runs over 3000 rpm. when this happens i pull over turn off the engine for about 10-15 seconds. then restart and the light is off. when i put it into gear it bangs like it is having trouble shifting into the gear. then when i get going it is fine. has just started doing this in the last 2 months. it happens about every other day. last week i had to pull over 3 times while driving to work. HELP PLEASE!!

27 out of 27 people think this is helpful.
80

my 20o1 Sunfire is doing the exact same thing as Steph S(^above post^) does anyone have the answer for us? Like StephS said...HELP PLEASE!!

8 out of 8 people think this is helpful.
33,375

Check engine light on?

2 out of 2 people think this is helpful.
20

Yes. What my boyfriend did was take off the wheels and clean the wheel speed sensors. I think that's what they are called. They were VERY dirty. After he put the wheels back on, no Trac off light. That was in the end of June early July I think. Since then the trac off light has not come on and the engine is running fine. Besides being in need of an oil change she runs like a top!

2 out of 2 people think this is helpful.
10

Rick, I just had to replace a wire to my shift 1-2 shift solonoid. I just had my wheel hub replaced and my trac light and abs light are on as well. I will try cleaning speed sensor and if that doesn't work I will replace it

1 out of 1 people think this is helpful.

Your Answer

Add photo

Related Questions

Sunfire

Looking for a Used Sunfire in your area?

CarGurus has 323 nationwide Sunfire listings and the tools to find you a great deal.

ZIP:

Search Pontiac Sunfire Questions

Pontiac Sunfire Experts

#1 John Saffrahn
John Saffrahn
Reputation 2,670
#2 Joeyadams
Joeyadams
Reputation 1,310
#3 Warren0007
Warren0007
Reputation 1,230
View All

Related Models For Sale

Used Chevrolet Cavalier
1,070 listings
Used Pontiac Grand Am
1,263 listings starting at $1,593
Used Ford Mustang
396 Great Deals out of 47,365 listings starting at $1,999
Used Honda Civic
516 Great Deals out of 89,847 listings starting at $1,299
Used Pontiac Firebird
6 Great Deals out of 744 listings starting at $2,500
Used Pontiac Grand Prix
23 Great Deals out of 2,919 listings starting at $1,995
Used Chevrolet Camaro
151 Great Deals out of 32,742 listings starting at $1,729
Used Chevrolet Impala
543 Great Deals out of 29,827 listings starting at $799
Used Volkswagen Jetta
413 Great Deals out of 38,071 listings starting at $1,250
Used Toyota Camry
853 Great Deals out of 90,973 listings starting at $249
Used Nissan Altima
878 Great Deals out of 80,282 listings starting at $1,800
Used Honda Accord
790 Great Deals out of 88,192 listings starting at $1,150