VCDS has flashed up that my DPF pressure sensors has an open GRD. Looks like the part is cheap enough to replace but I can’t find a “how to”. Does anyone have a guid please?

 

many thanks,

chris.

A open ground doesn’t always mean a faulty sensor. 
can mean dpf pressures are off the scale causing issues, broken wiring or any other manner of things.

 

it may well be the sensor but doesn’t mean it’s the only thing it can be

VCDS error codes or in truth the VAG diagnostics behind it should never be taken at face value, I bet it actually says open circuit or short to ground which are mutually exclusive.

 

You should always start by testing the supply voltage to the sensor and the wiring continuity back to the ECU before condemning a sensor, unless of course you are a garage in which case it's giving you the green light to play parts bingo with the customers money.

 

You could also look at the live data readings before getting down & dirty.

Thanks for the advice guys.

 

At £13 for the sensor, depending if accessing the part isn’t hard, I’m happy to just replace it.

 

is it easy enough to change?

That seems really cheap I must say.

Not necessarily a good place for a cheap sensor,  the genuine ones may not always be able to survive the environment. 

https://forums.tdiclub.com/index.php?threads/dpf-pressure-sensors-melted.514897/

To be fair, I haven't read that thread to know if that was an OEM one.

That thread actually has a link back to this one. An even scarier pic halfway down page 1

 

Edited 5 August, 20223 yr by Breezy_Pete

You may wish to update your user profile with so car details, so that it makes things easier.

Cannot tell you how to repair what we don't know.

 

I wouldn't waste time with a cheap sensor, as mentioned could be a future fire risk... if it even reads correct.

Also as already mentioned the fault code doesn't automatically = dead sensor.

4 hours ago, Breezy_Pete said:

That thread actually has a link back to this one. An even scarier pic halfway down page 1

 

There must be a reason why so many DPF diff press sensors failed imediately after a cambelt change.

 

Valve timing incorrect resulting in higher exhaust gas temperatures?

 

Hard to imagine them being hotter than during a regen but retarded ignition timing (not in this instance) can cause the exhaust headers to go cherry red even at idle speed.