Hi there hope someone can point me in the right direction. I noticed my DPF warning light is on on my skoda octavia estate. The problem is its only on when the headlights are on. The fog light symbol on the dash is also on permanently when the headlights are on even though the fog light switch is off. If I have the sidelights on there is no dpf light and no foglight symbol. Also when the fog light symbol is on with the dip headlights the fog lights are not on either.  I hope that makes sense? When the lights are off I can just see a very dim DPF light but not all the time. Has anyone any ideas. Its confused  the hell out of me. I cant see that the headlights would be connected to the DPF sensor at all

Alasdair

Have you recently fitted an HDI conversion to the headlights?

No I havent touched the car lights. I first noticed the dpf light glowing really dim, almost not noticeable on a very dull day. When I turn the headlights on set to dip the DPF light comes on brightly but also the front fog lights symbol on the dash appear with the dip light symbol. As said the foglight switch is off Have no idea why the two should be connected?

Got me a bit confused

Alasdair

 

I would remove the connector to the instrument binnacle and clean the contacts with electrical contact cleaner, also check them all visually, if no change then I would dismantle the binnacle and check the soldered joints on the PCB from the connector.

 

Early vehicles had problems with dry joints and cracking, it does sound like an earth path problem but with LED idiot lights its less likely.

Edited 3 July, 20205 yr by J.R.

Thanks for the reply,

Is it fairly easy to get to the connector? It did cross my mind it might be a wiring fault but it makes more sense to be  something to do with the dashboard display etc. Also any reccomendations  on a good electrical contact cleaner.

Alasdair