Help with some om651 fault codes

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millo777

MB Enthusiast
Joined
Mar 9, 2011
Messages
1,250
Location
Swansea, Dubai, Riyadh
Car
1997 W140 S600L/2003 S211 320cdi
I've been trying to help a friend with a w204 c220cdi solve an engine surging/erratic revs issue and need some help.

I've read the codes using a star diagnostic system which has turned up the following:

P019315 the rail pressure sensor has a short circuit to positive

P026946 teach-in of operating parameters for cylinder 3 malfunction

The issue has apparently come up a few times previously and he's had the AA to delete the codes which has temporarily solved the problem. In inevitably comes back a few days later.

My first thought was to replace the fuel pressure sensor?

Any guidance greatly appreciated.

Many thanks.
 
Defective FRP sensor. Gives fault code P0193 generally, causing erratic idling, hesitation, stalling, excess fuel usage, smelly exhaust.
 
Thanks for the reply. I've told him to order the sesnor.
 

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