Hi - I've had the Amber ABS and Traction control lights illuminated on on the dash for a while. They went through a period of being on initially, but then after a short drive would go off, but now they're just on all the time.
I put a diagnostic reader on and it showed a fault with the rear left ABS sensor so I replaced that and cleaned down through the hole as much as I could. The fault code for the sensor giving inconsistent readings has gone with being cleared by the reader, but I'm left with the lights on the Dash still being illuminated as Amber and the trouble code:
C1 01 C01 Active/static

Left rear ABS wheel speed sensor

Electrical error

I can't see any damage to the wires as far as I can check.

Does anyone have and guidance on what the problem might be or what I could do next to try and resolve it?

Many Thanks

Might be a break in wire but I assume it would throw up an error code as before if the wiring was faulty. Try disconnecting battery for a while and reconnecting. It should reset the car. Also check the strip fuses in front of battery for hairline cracks. They are sometimes almost impossible to see.

Alasdair

Before you start checking the wiring check that the sensor is working correctly as it may be just some thing as simpla as a bit of grease or dirt in the front drive shaft sender plate that the sensor picks up from on the CV joint clean that firstly then if you have a multi meter or can borrow one jack up the front side you think the problem might be and remove that wheel, put it out of gear so that the wheel can turn it's easier to do and get at the sensor connection, set the meter on the test setting so when the two probes are touched together they show a zero on the screen or the meter sounds a little bleep , put the probes into the disconnected sensor on the hub as if you were testing a cionnection for power and earth and then turn the hub the meter should if all is fine show zero then nothing zero nothing and so on that then tells you it's working ok , if the cables are faulty you need to then test again from the connection to where ever you can get at the connection the other end usually a multi connection but cannot help you here have always found the fault in the hub sensor or it's been rusty or dirty----------Sorry just noticed it was a rear wheel slightly different as the sensor is harder to get at as it's in the back of the hub you cannot get at the sensor ring on the rear without taking the hub off the spindle the sensor is it the rear undernesth the car i think it's held in by a 8mm otr 10mm bolt it's hard to get out if i remenmber the connections for these are in the middle of the rear beam up on the floor pan

Edited 26 July, 202526 Jul by Murdockman