Hi new to the forum but big fan of the 406 HDi have an exec model estate on 230k perfect in everyway except it’s developed a flat spot which is intermittent and feels like turbo lag.....
No fault codes and MIL active......
Has anyone had this? Or have any ideas?
2000 406 Estate 2.0 Hdi 110 exec - Flat spot/intermittent turbo lag
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Bolteyes82
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Doggy
- Mod with a 2.2 HDi, De-Fapped!
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Re: 2000 406 Estate 2.0 Hdi 110 exec - Flat spot/intermittent turbo lag
Hi & welcome aboard. 
Mass Air Flow sensor is the usual suspect. With the 110 engine you can simply unplug it & see if it improves things as a cheap first diagnostic step.
Mass Air Flow sensor is the usual suspect. With the 110 engine you can simply unplug it & see if it improves things as a cheap first diagnostic step.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
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GingerMagic
- 3.0 24v
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Re: 2000 406 Estate 2.0 Hdi 110 exec - Flat spot/intermittent turbo lag
I agree, the MAF sensor is the usual culprit, however I suspect a sticking EGR valve may also have a similar effect. This can be temporarily disabled to eliminate it as faulty.
I would try injector cleaner and super diesel for a few tank fulls too - given the mileage, just to see if it feels any different.
I would try injector cleaner and super diesel for a few tank fulls too - given the mileage, just to see if it feels any different.
2003 2.2hdi estate - mine
1998 Volvo 940 auto estate - also mine
2019 Citroen C3 something - the wife's
PP2000 user, can help with faults / diagnostics in the Bournemouth area.
1998 Volvo 940 auto estate - also mine
2019 Citroen C3 something - the wife's
PP2000 user, can help with faults / diagnostics in the Bournemouth area.