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06 combo cdti, the speedo reads 20/25 mph..fitted..vauxhall..wheels…

Customer Question
hey, ive got a 06...
hey, ive got a 06 combo cdti, the speedo reads 20/25 mph to fast, had new speedo fitted and coded by vauxhall, wheels are correct size? now also have the engine management light coming on whilst driving, no performance effected
Submitted: 8 years ago.Category: Australia Car
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Answered in 11 hours by:
6/9/2010
AU Auto Mechanic: Curtis, Australia Car Mechanic replied 8 years ago
Curtis
Curtis, Australia Car Mechanic
Category: Australia Car
Satisfied Customers: 1,746
Experience: Qualified Automotive Mechanic, LPG & Airconditioning Diagnostic Technician.
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This is most likely due to an incorrectly fitted wheel speed sensor or faulty wheel speed sensor. Also ensure the vehicles ECU has been correctly configured with the right diff ratios and wheel sizes including the correct transmission type.
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Customer reply replied 8 years ago
thanks, XXXXX XXXXX faulty speed sensor bring up the engine management light? the speed sensor is conected to the abs if im correct? would this not show up as a abs sensor fault also? ive had enough of vauxhall, they dont really seem interrested, will i need them to check the ecu or could a normal diagnostic machine do the job? thanks again
AU Auto Mechanic: Curtis, Australia Car Mechanic replied 8 years ago
Yes it will bring on the engine light depending on the fault, especially if it is a vehicle speed fault. The vehicle speed is sent over the vehicle network from the ABS module to the ECU. A normal diagnostic scan tool should do the job.
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