Mercedes Benz M-Class - Irregular engine running | HELLA

Mercedes Benz

M-Class (163)

Model year: 1999 – 2004

Engine: 612,963

All models

Irregular engine running

Error code: P1187

Common rail pressure is too high/low

If the above fault code is read in the fault memory of this vehicle model's ECU, this may be associated with a defect in the fuel filter. Air inclusions in the fuel line after the filter can lead to a lack of fuel flow.

In this case, the fuel supply should be checked and the fuel filter should be replaced if necessary.

The vehicle manufacturer offers a modified fuel filter in the spare parts program.

Spare part number:

Fuel filter A 611 092 00 01

Fuel filter (bio diesel) A 611 092 00 01

Afterwards clear the fault memory entry using a diagnostic instrument.

Important safety note Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their day-to-day work. The information provided on this website is intended for use by suitably qualified personnel only. Reprinting, distribution, reproduction, exploitation in any form or disclosure of the contents of this document, even in part, is prohibited without our express, written approval and indication of the source. The schematic illustrations, pictures and descriptions serve only for the purposes of explanation and representation of the instructions and cannot be used as a basis for installation or assembly work. All rights reserved.

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