what happens first, the abs/trac light or the running rough?
abs trac light
what are the trouble codes
about the same time
shows left rear wheel sensor
do you have the code?
most parts places will scan for free
If you get the code I can look over the diagnostic chart and see what possible causes we are looking at
I am looking through bulletins now
the service engine light doesnt come on have had it to two diff mechanics to no avail
Many times a misfire will cause the trac/abs light to go on
but that would not explain the L/R sensor code
you may have 2 issues
comes on at 45 miles per hour engine is not missing computer
car wont run right when lights come on speedometer jumps
what do you mean then
codes will help a ton
they said the code was for a left rear wheel sensor which they replaced then it showed a right rear wheel sensor which they replaced none of these fiixed the problem and then they said it could only be the abs/modulator pump which i bought and had replaced yesterday but did not fix the problem .
we need all the codes to see if there is a communication issue. The cluster is central point of the computer network
dont have and can't get
since the speedo jumps it maybe a software issue or the cluster having problems getting info from the abs or trans speed sensor.
in the usa
you can try checking the cluster connection
they said that if the service engine light doesn't come on their scanners won't pick up the code auto zone tried and couldn't pick up the code that's why i took it to the mechanics
I would try checking the cluster and making sure there is a good tight connection with the pins. The dealers have the scanner that can access all the systems and even reprogram, that might be the only way to know for sure.
The guy might have said the abs module because the PCM and abs modules are not communicating.
so you say that the instrument cluster would cause the trac light to come on and the abs light which in turn would cause the computer to think that one tire is messing up and cause the sensor to tell the computer to brake
The abs/trac lights would come on if the PCM and the ABS module cannot communicate
it ended up being a short in one of the in front of the car
it ended up being a short in one of the wires in front of the car.