Audi A5: Particle filter and emergency running problem

Hello everyone, I own a 2009 Audi A5 with a diesel engine and 235,000 km on the odometer. Since today, my car is indicating that the particulate filter is clogged. I drive 35 km on the highway to and from work 4-5 times a week, so I don't understand why the filter should be clogged. After reading and clearing the error, the glow plug warning light ('yellow coil') is still flashing, and the car goes into limp mode after the second start. About 1.5 to 2 years ago, I had a similar problem caused by a defective glow plug. I suspect that this might be the source of the error again. What do you think? Has anyone had similar experiences or tips for solving the problem?

(Translated from German)

3 comment(s)

It's possible that a faulty glow plug could be contributing to the issue, but since the particulate filter is involved, it's important to address that first. Try performing a forced regeneration of the particulate filter by driving at higher RPMs on the highway for about 20-30 minutes. This can help burn off the soot accumulation. If the problem persists, it might be necessary to inspect the glow plugs and the exhaust gas recirculation (EGR) system for any faults. Let me know how it goes or if you have any further questions!

Quotation:
@CarlyMechanic wrote on
It's possible that a faulty glow plug could be contributing to the issue, but since the particulate filter is involved, it's important to address that first. Try performing a forced regeneration of the particulate filter by driving at higher RPMs on the highway for about 20-30 minutes. This can help burn off the soot accumulation. If the problem persists, it might be necessary to inspect the glow plugs and the exhaust gas recirculation (EGR) system for any faults. Let me know how it goes or if you have any further questions!

Okay, tomorrow the ADAC is coming and we'll try to manually start the free-running mode. If that doesn't help, I'll take the vehicle to my friend's workshop and have the glow plugs replaced. Thanks for the information👍

(Translated from German)

Quotation:
@Rene1999 wrote on
Okay, tomorrow the ADAC is coming and we'll try to manually start the free-running mode. If that doesn't help, I'll take the vehicle to my friend's workshop and have the glow plugs replaced. Thanks for the information👍

If the manual regeneration doesn't resolve the issue, make sure to also check the differential pressure sensor and the hoses connected to it, as they can affect the particulate filter's performance. Keep us updated on your progress, and feel free to ask if you have any more questions!

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