I had a DPF alarm which kept coming on all last summer - particularly when towing my caravan. Thinking it could be poor fuel I have not run it below a half full tank for nearly a year and even added DPF cleaner for a few times but no joy so I just kept resetting the light via OBD. No running problems were experienced.

It was quiet all winter when I wasn't towing and emissions were great at the MOT last week. Today, I towed the caravan for the first time this year and behold - light came on.

Suggestions welcome please as it is very annoying.

What engine & mileage?

1 hour ago, DaveGlew said:

Today, I towed the caravan for the first time this year and behold - light came on.

Is that light ONLY for a DPF problem?

Might be a faulty DPF pressure sensor/wiring. When towing the engine will be under more load so may be getting confused and sending wrong signal or due to towing at lower speeds with engine under more load it may not be regenerating properly. Might be worth getting it scanned with vcds and also check soot/ash levels etc. Check exhaust system for leaks as well.

Alasdair

5 hours ago, ords said:

What engine & mileage?

2 litre diesel

Just now, DaveGlew said:

2 litre diesel ......70k mls

4 hours ago, PetrolDave said:

Is that light ONLY for a DPF problem?

Yes...tits the yellow engine warning light but dpf is the only alarm showing on obd

UPDATE: PROBLEM SOLVED

When investigating the dpf pressure sensor itself, I opened up the heatshield to discover a molten mass of plastic. The sensor was toast. Ordered a new one (part no. 03L906051D) along with another plug which was also toast.......ebay was £40 cheaper than main dealer for the same part. No idea why it would have totally melted but hope the new one will survive better.

Worthy of note is that the sensor has two pipe connections but confusingly, only one pipe coming from the engine........after putting in a call to the (very helpful) Skoda dealer, it seems one port is simply left open to the air (atmospheric pressure).

Now I'm waiting patiently (not) for the part to arrive. Thanks to all who commented.

Glad it was the sensor not the DPF. Read it can be a fairly common problem.

Alasdair