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There is also a cam shaft speed sensor change it and then see. Most other devices require the input of the pulses from this sensor in order to work. Lets face it if the engine (acording to the cam speed sensor) is not running why alow the speedometer to register
Hello! It sounds as if you have a wheel speed sensor that is failing. The wheel speed sensor calculates the wheel/tire revolutions and sends this information to the speedometer, which then displays that information as MPH/KPH. On 97-06 Grand Prix's this and the ABS sensor are the same module, and in order to replace, you must replace the entire hub assembly. Here is a view of the hub assembly from the back side of the hub/wheel assembly. You may want to inspect the sensor wires for any fraying, loose connections, etc.
2001 Pontiac Grand Am 2.4L SFI DOHC 4cyl Vehicle Speed Sensor - Location: The speed sensors are built right into the wheel bearings of your vehicle, at the front and rear locations. They work
both with the anti-lock brakes and with the traction control systems on
Removal & Installation Front The
front wheel speed sensor is part of the hub/bearing assembly. Refer to
Wheel Hub and Bearing Replacement in Front Suspension for service
procedures. Rear The rear wheel speed sensor is part of
the hub/bearing assembly. Refer to Wheel Hub and Bearing Replacement in
Rear Suspension for service procedures.
I hope help you with this (remember rated this help) Have a nice day, good luck.
For starters you need to find out which wheel is causing the fault. secondly some wheel speed sensors are built in to the wheel hub assembly, to identify what style you have depending if its in the front or rear. look behind the wheel where the CV axle goes into the hub , the wire for the speed sensor will either go into a black fitting with 2 torx screws OR go directly into the hub. If the wire goes directly into the hub you will need to replace the entire Wheel Hub Assembly. if the wire goes into a fitting style you can just replace the sensor itself.
I would have the trans speed sensor checked before removing dash assembly. The speed sensor is an analog sensor that sends a signal to the dash. It is located near the trans output shaft attached to housing with a small bolt. It is gear driven and quite easy to get at. It is also subject to heat and road conditions, makeing this the prime culprit in speedo problems. Hope this helped. Moe