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HDC Inactive, multiple faults. Speed sensor?

22K views 19 replies 6 participants last post by  MARK_C  
Hi,

Did you ever find a fix for this? My car just had both turbos done and I have all the same faults appear at the same time. Didnt have them before it went in for turbos.

Battery is reading 14v.
 
I had a code for the front right speed sensor, so swapped the speed sensor and the height sensor just to be safe. All faults went. 👍

Do you have a code reader? Like the Gap iid? Did the garage lift the car when doing the turbos? Possible the garage messed up a height sensor while lifting?
I have the Gap iid tool already, owned td6's for the last 6 years but my first tdv8! My friend did the turbos for me, ex land rover mechanic. He lowered the engine by half a foot or so to do the job so subframe/suspension was all unbolted from the car.

I would assume dead sensor of some sort but was just checking it wasnt something stupid elsewhere before I started to throw parts at that front corner! I know how these cars can point you one direction but it is something completely random and you would assume not related.
 
Roughly the same codes you had with a few small changes and less other codes. Havent looked at live data to see what the wheel speed sensors are saying yet.

I spoke to the previous owner and he said it didnt do anything unusual prior to the turbos dying so its related to something when they were fixed but not sure where to start!

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It’s the last code - one of your abs / speed sensors is dodgy or has a poor connection. Not sure which one that code refers to. Sensors are cheap and not hard to fit so replace it. The rest of the codes are a result of that.
Disconnected the battery over night to charge it up just incase as it had been sitting for a while. Faults had gone and car dash was normal with no lights.

Tried turn the steering side to side and it all went off with the same 4 terrain response codes back.

Drove the car with the wheel speed values displayed and all 4 were normal.
Looked into the steering angle sensor due to turning the wheel causing the issues and it is showing no codes, numbers are reading correct on live data which confuses me more.
Height sensors are all normal with no issues or variations there either.

At a bit of a loss here without just wiggling all connectors in the engine bay to see if anything is loose after the subframe/engine getting dropped down slightly.
 
Ok to update this with my issues and current fix. The steering wheel was 360 degrees out, when the steering got reattached it had done a full 360 so was reading right lock when straight ahead. When you then turned right past a certain point it read it as invalid so threw all the codes.

I now have a front right abs reading 0 issue so think that sensor needs swapped or a loose connection after the engine work with suspension/subframe lowered down.