clsuer

2002 BUICK CENTURY
68,000 MILES • 3.0L • 6 CYL • FWD • AUTOMATIC
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JKERT10
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  • 2 POSTS
the speedometer bounces up and down and when it goes down below 10 mph it causes the car to downshift. I replaced the vehicle speed sensor and had all the wires grounds checked I have $360.00 spent and it still does it. I have now been told it may be the Body Control Module can you help me at all here I am very frustrated but 2 reputable shop can figure it out.

Joe
Jul 24, 2014 at 7:07 PM
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HMAC300
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  • 48,601 POSTS
might be a bad dash are there any codes? check fuel pressure with a gauge autoparts rent it. body control module has no effect on running of car it's the pcm
Mar 22, 2021 at 6:38 PM
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JKERT10
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No it gives no codes and we drove around with it hooked to a meter and it didn't do it of course. I am not as concerned with the bouncing speedo but the shifting can't be good. All the other gages work correctly
Mar 22, 2021 at 6:38 PM
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HMAC300
  • CERTIFIED EXPERT
  • 48,601 POSTS
a lot of times these shifting problems are at the connection of the trans or just before it the wiring breaks or gets water on it an d then screws up that may be the speedo problem as well.
Mar 22, 2021 at 6:38 PM