Alfa 159 1.9 JTDM: Specs, Problems, Review

Do we have an Alfa mechanic here?

I have a 2006 Fiat 159 1.9 JTDM with a DPF and I'm getting the error code P1206.
According to my information, there is supposed to be an update for the engine control unit to fix this issue.

Part number: 0281012144.
Software version: 377871.

Can anyone tell me if there's any new information on this?

"Thank you."

Hi,

P1206 is a manufacturer-specific error code. For Fiat, it indicates that the differential pressure across the diesel particulate filter is too high, meaning the filter is clogged.

As someone who doesn't own a Fiat, I would check the following:
- Mileage. Is the DPF simply clogged with too much ash?
- Function of the exhaust temperature sensors and coolant temperature in the engine control unit (malfunction prevents/hinders DPF regeneration).
- Is the differential pressure sensor working correctly?
- Function of the AGR valve (malfunction prevents/hinders DPF regeneration).
- Leaks in the charge air system (cause excessive soot buildup in the engine, which fills the DPF much too quickly).
- Oil consumption?

Regarding potential software issues, I can't offer any further details, but I would like to point out that the same software has worked perfectly well for a long time.

Best regards, Rainer.