Suspension Fault — Temp Sensor?

[dtopkin]

U210A-16(AF) -
Temperature Sensor - Circuit voltage below threshold

Showed up on my drive home, it'd go away after a bit, then come back up, and then go away, and come back. No restricted mode or anything like that.

I've read that there are issues with the sensor inside the compressor. I have a Hitachi. 2015 LR4, 83k miles. Curious if there's a way to replace just the sensor? Seems like there is more of an electrical issue? Fuse maybe? Open to any insight here...

 

[ftillier]

Are you sure you have a Hitachi? 2015 should have come from the factory with AMK as far as I understand.

 

[dtopkin]

Nope—it's hitachi, the old type.

 

[dtopkin]

Spoke with my indy—and they said they've never done one of these before, just replacing the sensor and questioned whether you can even purchase the sensor on it's own. I'd hate to have to replace the compressor just for the sake of the sensor... but will do, if that's what it comes down to.
Any other options people suggest I start with here? Relays? Etc?

 

[dtopkin]

After more research and diagnoses, it seems like it's an electrical fault and the wire that connects the sensor is corroded or shorted. The fault will show up by just turning the ignition on (not engine), which is a direct indication that it's an electrical fault. The code provides that clarity too. Will need to track down where the issue might be now.

 

[ryanjl]

Speaking from my own experience, pull the compressor and make sure the wires are fully plugged into the sensor.

How many miles are on your LR4? How long have you owned it? Echoing what the earlier poster said, Hitachi compressors were phased out around 2012 or 2013. My guess is yours has been replaced once already and they used a Hitachi?

 

[dtopkin]

Speaking from my own experience, pull the compressor and make sure the wires are fully plugged into the sensor.

How many miles are on your LR4? How long have you owned it? Echoing what the earlier poster said, Hitachi compressors were phased out around 2012 or 2013. My guess is yours has been replaced once already and they used a Hitachi?

I'll give this a shot. I only have 83K miles on it. Owned it for just over a year now—I did do some pretty heavy off-roading over the weekend, and I wonder if the cable might've come loose or something like that.

 

[ryanjl]

Mine wasn't the temp sensor; it was the exhaust valve sensor. Here is my post when I discovered the problem:

Some suspension fault codes this morning

So this guy had a similar problem. Once again, looks like it was a wiring issue. I think my plan is to just order a new compressor. When I get it, I'll remove my old one and really poke around and see if I can find any issues. The guy in the above video had to pull apart his compressor's...

www.landroverworld.org

Anyway, could be the same thing with you. I have no idea where the temp sensor is, though.

 

[dtopkin]

Yeah—I have a feeling it's something very similar. The intermittent come and go of the fault while driving initially definitely had me wondering if it was just some bad connection. And then with the fault showing up before the engine is even turned on all but confirmed that. I'll check the fuses + relays too. I can already hear the dealership saying "Well, looks like you need a new compressor!"

Appreciate the help!

 

[dtopkin]

UPDATE: Issue solved.

It ended up being the temperature sensor that's connected to the compressor. BUT, when I tried to replace the temp sensor, it cleared the code, but then threw a SOLVED. C1A27-12 - Compressor Circuit - Circuit Short to Battery code, think I might've shorted the relay. But, when I tried a different relay, I still got the code. Luckily, I'd ordered a new compressor to have for a rainy day—turns out that was the rainy day. Ended up replacing the whole unit, and all is well.