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(TA210-0912) Lack of power, jerking and/or vibrations during regeneration

TECHNICAL ADVICE - Quick information for your help
Bulletin Nbr: TA210-0912
Date: ........... May 2009
Market: All
Lack of power, jerking and/or vibrations during regeneration

VEHICLES CONCERNED

Saab 9-5 DTH MY 06 – (up to Engine No: 495535).

9-3 DTH MY 07- (up to Engine No: 495535)

9-3 DTR MY 08 – (up to Engine No: 6283770)

BACKGROUND

Due to variations in fuel quality and driving pattern, abnormal carbon deposits can build up on the valve shaft and during the regeneration phase the increased temperature of these carbon deposits prevent the valve from closing correctly.

SYMPTOM DESCRIPTION

Customer reports of lack of engine power with jerking and/or vibrations during DPF regeneration phase which nominally occurs every 400-1000 miles depending on driving pattern.

ACTION

A new design of the exhaust valve with a carbon scraper ring has been introduced.

Part No: 55 219 794


In case of customer complaint check with Tech 2 that the "Distance Since Regeneration" correlates to when driver has noticed the symptoms. Remove the cylinder head according to WIS/TIS 2 web and replace the exhaust valves with modified part. Refit cyl head and test.