I have a 2002 2.0 HPi Exclusive which has failed to start showing an Anti-pollution fault, along with EPS/ABS failure.

Car uplifted by local dealers and they tell me that the diagnostics are showing a Cylinder Reference Sensor as being faulty.

Could this be connected to a botched up repair on the ECU (removed from car to be sent for refurbishment, and lost by carriers) which was done in March?

How much is this likely to cost me?

Any pointers would be much appreciated.

Bob