Anyone had G235 EGT sensor fail?

[jazd]

I'm getting an intermittent fault on G235 (scanned with VCDS), the temp sensor before the turbo. Glow plug light comes up and the check engine/workshop message comes up.

VCDS is reading 1000/1024 degs. Fairly sure this is not the actual temperature but the sensor has failed. Weird though it only happens when I put my foot down, but you can see the other 2 temp sensors aren't going very high.

So yeah just wondering if anyone has replaced one before. The part number is 03L 906 088 BS and its listed at around $200 in ETKA. I wonder if any other part numbers are compatible.

[gldgti]

I would log the output during a drive to be sure. It should be smooth and vary between 150-200C at warm idle, and getto 3-400 C during normal driving whilst accelerating. During a hard pull I would not want to see it go over 850. If it was really reading 1000C, you would be in major trouble (melted pistons etc).

They are a resistance based sensor but I would think if it was going to fail it would go way out of range. Also, I'm not sure that it is, but I would expect it to be basically just a k-type thermocouple.

[h100vw]

Not logged one that high, even on a regen 900 is a lot.

[Transporter]

I replaced one last week in Scout TDI BMM engine. I'm sure it's the same sensor, it's quite common failure. Disconnect the sensor’s connector, connect a new sensor or 220ohm resistor and check the measuring block 067, it should be showing ambient temperature.

[PeDiES]

I've changed a few, fairly common issue

[buzuki]

i replace one today. On a caddy.

[Umai Naa!!]

I've put 3 in the same Caddy.

Not sure what the go was there.

I did read that you have to be gentle with the wiring, but I was certain that didn't atribute to subsequent failures.

[jazd]

Thanks guys, seems like it is very common. Hopefully I only have to replace mine once.

I have logged it and yeah it jumps up to 1000, I was basically just worried something had gone horribly wrong and it actually was getting that hot.

I hope its not a pain to get at.

[Umai Naa!!]

It is a big pain.

It's buried in amongst the turbo.

[jazd]

Ah crap. I wonder if I even need it since I no longer have a DPF. I could map the engine light out and save myself $230.

[Transporter]

I hope its not a pain to get at.

To undo it, you may need 17mm crows foot spanner - slimmer the better. I always remove the EGR pipe for easier access. When you installing it, don't bother with the 17mm crows foot, just use 17mm short spanner.

[gldgti]

I would keep a pre-turbo EGT sensor if you're keen on tuning (and you are )

[buzuki]

Transporters method is spot on.

Although i didnt need a crows foot. Once the EGR pipe was off it was fairly easy with a spanner.

Takes bout half hour on a hoist. Book time is 90time units (54 minutes)

[jazd]

Thanks Transporter, might just totally remove the cooler if I can. Its not in service any more anyway.

Yeah its probably best I have a way of measuring EGTs

[gldgti]

Book time is 90time units (54 minutes)

Please, this is not sarcasm on my part - beleive me - but - the dealer has its own unit of time? Normal time not good enough eh?

Sounds like something from a Monty Python skit

(ps, I realise its 100seconds/unit.... just makes me laugh is all)

are the lunch breaks also measured in time units?