Can anyone help, i have an Audi A3 170 and the PDF warning light has come on.
Did you at this time attempt to regen the DPF as per the handbook, failure to do so in an ammount of time/milage will result in the warning lights coming on and the car going into limp home mode. Failure to regenerate caused the DPF to become too full of ash and become too dangerous to try and regen. Think its over 50 or 60%, but cant remember.
It started first with the light coming on 2 days later the glowplug warning light and the engine management light came on and to top it all it went into limp mode.
I was reliably informed that it was the exhaust pressure sensor and the fault code and the problem as remained.
Was the fault code recovered from the car refering to the exhaust gas pressure sensor? if not, its not so likely to fix the problem. However those sensors are notoriously unreliable, I changed 3 or 4 in 1 day a few months back.
Today i have had the car to an independant Audi mechanic who has tried a new exhaust pressure sensor again and the fault codes are still there.
Acording to the auto logic software he uses the car last did a regen 9km ago , he can not do a forsed regen because the fault code can not be erased, the fault code throughout this has been 08194 particle trap bank 1 efficiency below threshold p2002 short with power . Acording to the snapon scanner the ash mass in the PDF is 43.5% .
Anybody any ideas on this please ?
That doesnt exactly make sence, P2002 or 08194 is the code for DPF bellow efficience threshold, but you also say somthing was short to power. What was short to power?? this will probably be the fault, maybe it was one of the exhaust gas temperature sensors??
It will either be a sensor issue or a failed DPF. There are two exhaust gas temp sensors and the pressure sensor (thats already been change) that the ECU uses to calculate the ash mass and operation of the DPF, Make sure they are all checked out.
Also the pipes that go from the pressure sensor to the DPF need to be blown out to be sure they are not blocked with soot etc, as that will make the pressure sensor give false readings.