Morphaldo

2 concurrent issues. 1. Traced back to a faulty EGTS, part number and photos below if needed. That was not reading over 160Deg, so the DPF never reached temp to do a reg-gen which then caused over-sooting, and a flashing light on the dash. Readers will show you the two sensors, and you can see them increase as the DPF gets hotter - my faulty one is the center front on the DPF, not the one to the left. (boxer SH 2.0ltr engine). 2. Error (P0409) caused by a faulty EGR ("...P0409 comes up when the motor in the EGR housing fails. As far as Subaru is concerned, there is only one possible solution) - so replaced the EGR (cheers @David in Hampshire). Hasn't fixed it. Bugger. Still get the 2 lights every two engine start cycles. Tried resetting, diconneting the battery and pressing the horn, draining all residual power etc, leaving over night disconnected, etc etc. The EGR is working as you can hear it setting, however its reading a -7Deg when closed, was expecting that to be 0Deg. No idea why this would be, or how to resolve. what a nightmare!

My car wouldn't go in to re-gen mode as the EGTS was fooked. There are 2, this one is the first sensor, located right at the front center of the DPF, and you need to remove a small heat shield to get at it. Exhaust gas temp sensor (EGTS) part number for a 2.0ltr boxer is 22629AA040. They are cheaper from the dealers, £140 delivered. Using a reader, you can see if yours is bolloxd as the temp reading will stay flat (mine never read over 160deg).

I dont suppose anyone whould know where I can get a replacement EGTS for my boxer would you? (or the part numbers) Had the auto elecs machine on and the front seemed okay, the rear never went over 160deg. Cant seem to find one online anywhere! Ideally after a generic replacement. Thanks

Thanks David - can you PM how much? I have the tools for the swap over -and the one I have in now came from a seller who imports from China. Dont have an issue with that, it why consumables are now so cheap, and disposable! Best for us all.

Thanks for posting the above - i have had a re-occurring egr issue (P0409) for about 2 years now. Fitted a new EGR last year and its still throws errors. Can reset the code and its fine, re-errors after a restart. Or disconnect the battery and it goes away for two restarts, then returns. Had an auto-elec come out and they recon the error is caused by a faulting temp sensor on the DPF - these seem to be about £150+vat each (there are 2..). Going to try the swapping egr value again, buy a nissan one and swap the mech on top over as suggested - has anyone done this yet? The Nissan ones are £40 on ebay, so not a huge risk. Alternatively would anyone know where I can get the codes for the EGTS from? (Exhaust Gas Temp Sensor). Its a 2ltr diesel boxer, 58 plate (Nov 08)