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[brianp87]

i got advice on here about checking adjuster arms but they are both still bolted on at both sides and seem fine, what do i do next to fix my headlights. do i change sensors or motor

[Andy B]

i got advice on here about checking adjuster arms but they are both still bolted on at both sides and seem fine, what do i do next to fix my headlights. do i change sensors or motor

As said before, you need a code reader to ask the car, it could be either sensor or either level motor. 

[brianp87]

does any diagnostic machine able to do this or just vauxhall dealers

[TheBoy]

Needs a diagnostics machine capable of reading the Headlight Levelling ECU.  Many generic readers can't.

It also needs an operator capable of interpreting what the machine is telling them, which rules out most garages and an awful lot of dealers

[Entwood]

Brian .. stick your location in your profile .. there may be one of the forum tech2's near you far cheaper and far more knowledgeable than any stealers  IMHO .

[dbug]

Had this on the Estate - visually checked all ok.  As said above my cheapo "Tech2" wouldn't talk to sensor ecu.  Mates kit (much more expensive) gave error code for front wheel sensor.  Just about to change it and noticed corrosion on one of the wires about halfway along lead from sensor to front of car.  Cut wire, cleaned it up and rejoined it.  Wiped error message and now no MID error - and can hear adjuster motors working.  Rechecked error codes - all clear.

Sometimes cure not always straightforward!!

[Marks DTM Calib]

Had this on the Estate - visually checked all ok.  As said above my cheapo "Tech2" wouldn't talk to sensor ecu.  Mates kit (much more expensive) gave error code for front wheel sensor.  Just about to change it and noticed corrosion on one of the wires about halfway along lead from sensor to front of car.  Cut wire, cleaned it up and rejoined it.  Wiped error message and now no MID error - and can hear adjuster motors working.  Rechecked error codes - all clear.

Sometimes cure not always straightforward!!

Indeed, the key skill with error codes is remembering that they are nothing more than the ecu reporting that somethin gis out of range or not as it should be.

This could be a sensor, wiring etc