Citroen Dispatch Mk III ABS Fault C0037 11

[TheMorg]

I have a 18 Citroen Dispatch MKIII 1.6 Hdi that's showing an abs fault (and others I'm assuming that relate to not picking up the speed correctly).

On Diagbox it reads C0037 11 Rear left wheel speed sensor permanent fault, short circuit to earth. With no speed showing (the rest show 0 km/h).

I've replaced the rear wheel speed sensor however the fault remains after trying to clear it, and also having driven it for a few hundred miles. I've also swapped both rear sensors and the fault remains on the left rear wheel.

I've now traced the wiring back to the harness in the passenger footwell. Comparing resistance between the working right sensor - purple and brown wires @ 0.5 MOhms, and faulty left - white and yellow wires @ 16 MOhms. Does this indicate a fault on the wiring between the footwell harness and sensor? Resistance from harness to ecu (still attached) are both similar @ 0.935 MOhms.

Any help would be greatly appreciated.

[Huskyxantia]

Looks like a fault , if you can find any part of the loom that can rub against the body of the van , even check any connection plugs for dirt,grim, road muck can be very much like sand paper.

[Huskyxantia]

Also check the abs ecu plug socket and loom coming from that as these can hide breaks in the loom.

[TheMorg]

Looks like a fault , if you can find any part of the loom that can rub against the body of the van , even check any connection plugs for dirt,grim, road muck can be very much like sand paper.

Thanks. I've traced the wires from the sensor to the harness in the footwell, although difficult to check as it goes behind the adblue tank. Where the wiring splits to the two sensor didn't look particularly clever where it was almost bent back on itself, however removing the insulating tape didn't show any breaks.

All the cables at harness/ecu looked fine, and the connectors were clean.

[Huskyxantia]

The bent back on its self part might be a future problem, are the abs rings good ? Different car here but when i had an astra g many years ago my passenger side hub was shot, that controlled the speedo plus abs stuff, my symptoms where speedo worked when it felt like, abs light on dash, i changed that all was good, now if your vehicle has a main hub that works the speedo too it could be that, thats breaking down. Plus this wet weather speeds these problems up aswell.

[TheMorg]

The bent back on its self part might be a future problem, are the abs rings good ? Different car here but when i had an astra g many years ago my passenger side hub was shot, that controlled the speedo plus abs stuff, my symptoms where speedo worked when it felt like, abs light on dash, i changed that all was good, now if your vehicle has a main hub that works the speedo too it could be that, thats breaking down. Plus this wet weather speeds these problems up aswell.

I've left the wires loose, once everything's sorted I'll make sure there's no strain on them. ABS rings seemed ok, I didn't look very thoroughly as the fault to earth/no speed read on Diagbox made me automatically assume wiring/sensor fault. Area was cleaned with a brush and air hose.

I'll add the fault has been there for 3 months, and it initially flashed up once 6 months ago, but went away with an engine restart.

[Huskyxantia]

I'd say if it only happens as it does don't be to over worried, least you got a fault code to remind you when you do dig deeper, but as with codes some can be generic , abs issues as we know are not always the abs sensor when it is its simple fix, when there's a break in the loom it will throw up the fault when that part earths on something metal then you got to pin your way along the loom to when readings stop , then your have bits you cant reach.
Didn't have peugeot planet but .........
My 206cc had abs,esp all lite uplike a christmas tree, i did everything changed rings on the front, hubs on the rear all new sensors, reset the code, went 40 yards down the road all lights back on, long story short, my loom 10 inches down from the abs ecu was covered in road film, it was that abrasive it split about 6 wires and exposed a few more so it was earthing it self, id say the abs one your having the funny reading from may well have a break where you can't see, any way i had to re~solder and heat shrink all my new connections .. test drove it, lights all went off and have been ever since.,
id swap sensors over drive side for passenger if the leads are long enough see what that does, at least it might rule out something more exspensive than just the sensor itself.
But not a good job when wet. Hope you find your fault , more the cause , and rectify it. Let us know how it goes.

[Huskyxantia]

If its any consolation ... went to use my car this morning guess what , all my faults came back , mine will be water related ,as I've be in the rain with it, it can wait now for drier weather and the car will be rested now till next spring, my findings will be posted on here as and when. I will scan it later and drive it for live data.

[TheMorg]

Finally got round to fixing the issue. The problem was the wires between the sensors and the harness in the footwell.

Finding the correct part was the hardest bit, my local Citroen dealer was useless, local parts place could only get a part number for the complete wiring loom for the van, and almost every breaker I tried didn't want to know.

Ended up getting a used loom for £120 (!) delivered. Cut out the four wires I needed (it came with another 6 cables going to various places), put it into new conduit and ran it under the van. All working correctly now.

[Huskyxantia]

Mine ended up being a dead sensor off side rear , new one on now all is back to normal, well done for finding your faulty loom and sorting it .