maybe near were it tells you how much petrol you've got or next to what speed your doing
The Right Front ABS wheel speed sensor is also used as a rough road sensor to assist the knock sensor in dectecting weather there is a knock from engine or bump from the road in order to adjust the spark and fuel.
The engine computer is not getting a road speed sensor reading.
your speed sensor is failing, the speed sensor is located next to your oil filter it controls your speedometer
One of the main reasons a speed sensor can go bad on a vehicle is the location of where it is placed. Speed sensors are subjected to the elements. Road debris, dirt, water, and other things can hit it while a person is driving down the road. Speed sensors are usually placed near the drive shaft in the rear of the transmission case.
I am fairly sure that the Astra G (Mk 4) models withoutABS have the speed sensor in the gearbox, and the ABS models take the road speed from the left-hand front wheel hub. Unfortunately, the gearboxes fitted to ABS models have the speed sensor hole plugged, so this is something to consider if replacing the gearbox.
evo sensor, also known as steering speed sensor.
speed sensor
Trouble code P0318 means: Rough Road Sensor A Signal Circuit
Check the speed sensor on the top of the tranny. This will tend to build up with metal shavings and cause the sensor not to read the speed of the transmission.
the library should have a shop manual for this vehicle, you can make copies of the right sections :) the correct answer is determined by which speed sensor, in stick shift it's on the transmission passenger side drive shaft cone. in automatics it uses the turbine speed sensor located on the front of the transmission to determine vehicle road speed. crankshaft speed sensor is located on engine block under the power steering pump and camshaft speed sensor is on the rear of the cylinder head near the brake master cylinder. hope this helps.
Info on the Road King Forum about it...http://forums.delphiforums.com/Live2Ride/messages?msg=35643.2
I my experiece (not that I would know *caugh*) you can get past the speed limiter eventually, you just need a longer stretch of road and a steady foot ;)