Parking Sensor Problem (Bit Strange This...)

[citrophile]

Recently have been getting a fault on parking sensor system (error message and no display when in reverse) but ignored it as it wasn't critical and have only had time to have a proper look this weekend.

 

Plugged in the lexia, did a diagnosis and it came up with failed rear sensor. All well and good I thought, so replaced the sensor, checked for faults, all appeared ok. Stuck it in reverse and it works fine but the front sensors dont work. Checked again and did a diagnosis and lexia says the wiring circuits etc are fine, no open circuits, no short circuits (or so it says).

 

I seem to have hit a wall with this now (excuse the pun!). Is there something i'm missing, like a possible faulty ECU, or something else. Also, is there a way to check the sensors off the car without them being plugged in so I can at least narrow it down.

 

Cheers

 

Rob

 

[coastline taxis]

not to sure about this but do you not need to use the lexia to recalibrate the whole system again. never done muck work on the parking sensors but seem to remember reading somewhere that when you put a sensor in it has to be recalibrated

[paul.h]

There was a post on some copy Lexias messing up the reversing sensors so that they would need reprogramming but not with the same Lexia. http://www.citroen-owners-club.co.uk/citroen/topic/20714-c5-08-exclusive-front-parking-sensors-problem/

[citrophile]

Yep, it seems it is a problem with the Lexia stuff. I run mine through Diagbox which apparently can corrupt the settings sometimes. Solution is to go into Pug 407 diagnostics, then reconfirm front parking sensors. Did that and problem solved.

 

As far as I know you don't have to calibrate sensors when changed - or at least I've never needed to on mine.

 

Rob