Hi guys

Wondering if anyone can help, over the past couple of weeks my 110 TDI PD has been going in to limp mode intermittently over 3,000 revs. Initially I thought my MAF was on its way out so took it off today and gave it a good clean but still no joy.

After plugging in VAG COM and doing an auto scan and its thrown up a few errors with some of the sensors.

I think the main culprit is probably this one:

17563 - Manifold Pressure Sensor (G71): Short to B+

P1155 - 35-10 - - - Intermittent

I'm guessing that the map sensor is the one which is about half way down the intercooler on the near side?

Next one has left me a bit bemused:

17664 - Engine Coolant Temp Sensor (G62): Open or Short to Plus

From reading round this probably explains why my glow plug light takes a long time to go out even after replacing them. Question is can anyone point me in the general direction of where I should be looking?

Either I'm being really thick or the Haynes manual doesn't give alot away but I can't see this sensor for the life in me.

Thanks in advance.

Mike

MAP is on the intercooler I believe.

The coolant sensor is in the pipework to the right hand side of the engine (when viewed from the front). From the best of my memory it is sort of under the main air pipework (after the MAF)

Are you sure yours is a PD if it is 110?

At least it seems unlikely to be sticky vanes in the turbo, as they generates an overboost error code in vag-com.

Sorry ignore me its not a PD was thinking of the missus car for a minute.

Had a good look around all the pipes leading to the intercooler and couldn't spot anything obvious cracked or loose pipes so guess it must be the sensor. Will get one ordered and crack on this week.

Was wondering if there are any images or howto articles around which point out the coolant sensor, can't seem to find anything kicking around.

MAP is on the intercooler I believe.

The coolant sensor is in the pipework to the right hand side of the engine (when viewed from the front). From the best of my memory it is sort of under the main air pipework (after the MAF)

Are you sure yours is a PD if it is 110?

At least it seems unlikely to be sticky vanes in the turbo, as they generates an overboost error code in vag-com.

Edited 21 March, 201016 yr by MikeHowarth

Sorry ignore me its not a PD was thinking of the missus car for a minute.

Was wondering if there are any images or howto articles around which point out the coolant sensor, can't seem to find anything kicking around.

I can do you a picture of the coolant sensor on my 110 on Tuesday if that helps. Change is pretty easy. Make sure you get a new o-ring too. I found it easier to disconnect the wiring *once* I had removed the sensor from the piepwork, so:

- remove retaining clip

- place new o-ring on end of new coolant sensor

- quickly pull out the old coolant sensor & o-ring

- insert new coolant sensor

- put in retaining clip

- undo loom plug from the old sensor

- attach loom plug to new sensor.

If you leak out a *lot* of coolant you might need to top the level back up, but I only lost a few drops.

Job done. New ones are green, iirc, and older ones are black.

Edited 21 March, 201016 yr by mbames

I'd be extremely grateful for a picture if you've got a spare 5 mins, I won't be doing the work until next weekend now so no major rush.

I'm sure once I've seen where it is I'll be mildly embarassed that I've not spotted it, but I'm sure it will come in for somone else in the future.

I can do you a picture of the coolant sensor on my 110 on Tuesday if that helps. Change is pretty easy. Make sure you get a new o-ring too. I found it easier to disconnect the wiring *once* I had removed the sensor from the piepwork, so:

- remove retaining clip

- place new o-ring on end of new coolant sensor

- quickly pull out the old coolant sensor & o-ring

- insert new coolant sensor

- put in retaining clip

- undo loom plug from the old sensor

- attach loom plug to new sensor.

If you leak out a *lot* of coolant you might need to top the level back up, but I only lost a few drops.

Job done. New ones are green, iirc, and older ones are black.

I'd be extremely grateful for a picture if you've got a spare 5 mins, I won't be doing the work until next weekend now so no major rush.

I'm sure once I've seen where it is I'll be mildly embarassed that I've not spotted it, but I'm sure it will come in for somone else in the future.

Here's one I took earlier...

It's on the right hand side of the engine block looking from the front of the car.

Perfect!

That's much appreciated trundlenut looks like it should be a pretty straightforward swap then.

quote name='trundlenut' date='22 March 2010 - 08:54' timestamp='1269248098' post='1931822']

Here's one I took earlier...

It's on the right hand side of the engine block looking from the front of the car.

I took this after I changed the CTS for the newer green one. The O ring will almost certainly stick in the hole and you will need to fish it out. You can lose a fair bit of coolant if the O ring doesn't want to come out.