|Year of manufacture
|2016 - 24.07.2018
|Engine control lamp lights up
Important safety note
Technical information and practical tips have been compiled by HELLA in order to provide professional support to vehicle workshops in their work. The information provided on this website is intended for use by suitably qualified personnel only.
On the above-mentioned vehicle with a start-stop system, the engine control lamp may suddenly come on. At the same time, there may be a drop in engine performance. Error codes P0300 / P301 / P302 / P0303 / P0304 (cylinders 1-4 misfiring) may be stored in the control unit.
Possible causes are either a "software weakness" of the engine control unit or defective ignition coils.
In order to remedy this, it is advisable to first read off the manufacturing numbers of the ignition coils. If the numbers are before the four-digit number code 8208, the ignition coils should be replaced. In addition, a check must be run to see to what extent a software update for the engine control unit is available.
A software update can be carried out using Hella-Gutmann macsRemote Services or a pass-through-compatible Mega-Macs series diagnostic device. Furthermore, registered access to the vehicle manufacturer's online portal is required. If the appropriate equipment is not available, please contact an authorised specialist workshop.
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; indication of the document source is also required. 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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