Chat: 1998 Cadillac Deville grinds when accelerating. What causes this problem and how to
correct the problem?

Can you describe the noise a little more? Is it engine speed related, vehicle speed related, do you
hear it under the hood or only inside the car?

The noise sounds like growling when accelerating from a stop position. The noise comes from the
driver side.

Does it happen when sitting in park, or only when the car is moving?

When the car accelerates from a stop position.

OK. Then you may have a bad motor mount. This can cause the engine to vibrate on the frame
and give the noise and a grinding feel.

I have been told that the
traction control sensor is faulty.

Well, do you have an ABS or traction light on?

The message reads traction control engaged.
OK. That helps. Then yes, you may have an ABS wheels speed sensor acting up. This tells the
computer what the wheels speeds are. If it sees one different from the others, it activates and will
give a noise.

So do I understand that ABS and traction control are the same?

They work together.
ABS stops wheels slip during braking, traction control prevents wheel spin
during acceleration.
I also have been given a suggestion to replace the traction control harness. Does this mean it
is an electrical problem?

The whole harness, or a sensor harness to one of the wheels?

Does the part consist of wires only?

The system has a lot of wiring and many sensors.

So, my question is,to correct the problem, do I replace the harness or a the left joint?

OK. I am confused. What left joint?

Sorry! I don't know what to replace and repair to stop the "traction control engaged" warning
light.
It is possible that the codes were not still in the computer when it was at the other shop. Sometimes
codes will be erased from the car computer memory after a pre-determined time has gone by that
the computer did not detect a problem.

Now what do I do?

I would go by what the shop that read codes said. It makes sense you are getting a traction
warning, noise in left front, and they determined the left front sensor harness was bad.

OK, and thank you for your time and help.
;

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Cadillac Grinding Noise When Accelerating

Why did you specify something on the left side? Did you have it checked out and
they said it was the left front harness?

Yes, but only after I located the sound upon accelerating from a stop position.

OK. Well that info helps. If the left front ABS sensor harness was diagnosed as being
bad, then yes this should fix your problem. That, or the right front harness are
common for breaking wires inside the insulation and the harness would need to be
repaired or replaced. Not the whole traction / ABS harness, just the section to the left
front wheel speed sensor.

The car was put on a diagnostic machine which indicated that the codes indicated a
faulty traction control sensor.

Yes. If the codes was for the left front sensor, the harness to that sensor is common
to break.

I also had another automotive center check the problem by codes, and I was told that
no codes were available to show the problem. I think I'm getting the run around.