2002 Chevrolet Cavalier What could it be?

2002 CHEVROLET CAVALIER

212,000 MILES • 4 CYL • AUTOMATIC

MUSTANG67MH

MEMBER
11 POSTS

2002 Chevrolet Cavalier What could it be?
I have a 2002 Chevy Cav. sometimes the speed indicator will start jumping around and the car will shift up and down. most of the time it is fine. it only does this when the speed ind. starts jumping. What is the problem? It has a new speed senor.

Sep 14, 2011 at 2:35 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

there is a gear on the sensor that is plastic and dishes in the center that causes the type of issue you are describing. have it checked to verify.

Roy

Sep 14, 2011 at 3:15 PM

MUSTANG67MH

MEMBER
11 POSTS

What sensor? In the speedmeter? Thanks

Sep 14, 2011 at 4:41 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

no, in the transaxle. after you remove the sensor, it will be on the end of the sensor.

Roy

Sep 14, 2011 at 4:54 PM

MUSTANG67MH

MEMBER
11 POSTS

There is no gear on the end of sensor. It is magnetic. Thanks

Sep 14, 2011 at 5:58 PM

ASEMASTER6371

✓ASE Certified Mechanic
52,796 POSTS

is this the sensor that was replaced?? if it was, make sure the connector is good and apply some di electric grease. it could be as simple as a bad connection.

if not, you will need help from a shop with a scan tool to monitor the signal going to the pcm.

Roy

Sep 14, 2011 at 8:44 PM

MUSTANG67MH

MEMBER
11 POSTS

Thank you.

Sep 15, 2011 at 10:57 AM

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