Speedo Dosen't Show Correct Speed.

[Andy999]

Hi.

The speedo on my 2002 Xsara dosen't appear to show the correct speed I am travelling. When compared with my Sta-Nav, it indicates 35mph when travelling at 40, 60, when travelling at 75. Any ideas what could be wrong? Would it be an easy fix, or need to go nto a garage?

 

Cheers.

[Jonno]

Hi.

The speedo on my 2002 Xsara dosen't appear to show the correct speed I am travelling. When compared with my Sta-Nav, it indicates 35mph when travelling at 40, 60, when travelling at 75. Any ideas what could be wrong? Would it be an easy fix, or need to go nto a garage?

 

Cheers.

 

Possibly a bad contact at the speed sensor (If I remember right its somewhere near the diff unit on the gearbox) System works on very low voltages so any slight dirt or corrosion or cable chafing could have the needle being erratic. May possibly be a speedo head problem but best to check the simple stuff first.

 

Not had the vehicle jump started lately have you?

[Andy999]

Possibly a bad contact at the speed sensor (If I remember right its somewhere near the diff unit on the gearbox) System works on very low voltages so any slight dirt or corrosion or cable chafing could have the needle being erratic. May possibly be a speedo head problem but best to check the simple stuff first.

 

Not had the vehicle jump started lately have you?

No jump starts. Not had a problem in over 130K miles.

[BarbsC1]

No jump starts. Not had a problem in over 130K miles.

Well seeing you haven't had any speeding tickets upto now believe what your car is telling you, remember the speedo has a hard wire link between the gearbox and speedo I experienced a similar scenario with one of my cars the easiest way to check this is get someone to follow you and toot the horn or flash the lights at you when they reach an agreed speed if you are both doing the same speed happy days 2 cars surely can't be wrong