S320 (W220) error code

1991- Present : 300SE, S320, 400SE, 400SEL, S420, 500SEL, S500, 600SEL, S600, 500SEC, S500, 600SEC, S600
S320 CDI, S320, S430, S500, S600, S55 AMG, S63AMG, S65AMG
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C Class
Posts: 44
Joined: Mon 12 Oct, 2009 9:36 pm
Model you own: w126

S320 (W220) error code

Post by Richard46 » Mon 14 Nov, 2016 5:07 pm

The engine fault light on the instrument cluster has come on, although the car runs smoothly with normal power. An OBD2 scan with a Mercedes scanner came up with the error "Particulate Trap Efficiency Below Threshold". My understanding is that this refers to a fuel particle trap for diesel engines, but my vehicle is fitted with the V6 petrol engine, and the code shouldn't be relevant. Any bright ideas?

A wonderful S Class vehicle to own that makes me look wealthier than I really am. Somewhere among the 70 fuses and five computers is an engine and gearbox, I believe.

Posts: 120
Joined: Sun 10 Apr, 2016 1:16 pm
Model you own: w126
Location: Nth Dandalup WA

Re: S320 (W220) error code

Post by gazman » Mon 14 Nov, 2016 6:04 pm

Just a thought and I could be way wrong but could it be referring to the CAT?
1989 560 SEL King of the road

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