If a customer complains about the above error, this could be caused by the EGR valve. Error code P0400 (exhaust gas recirculation system, continuity malfunction identified) may be saved in the event memory. Coking and other deposits cause the valve to jam. In this case, proceed as follows:
- Remove the EGR valve and clean it thoroughly with appropriate products.
- If contamination is severe, the exhaust manifold must also be removed and cleaned.
- After cleaning, refit the parts that have been removed with new seals.
- Carry out a system check.
- Delete the event memory.
Important safety notice
The following technical information and tips for practical use have been set up by HELLA in order to offer professional support to automotive workshops in their daily work. The information available here on this website is only to be used by appropriately trained specialist staff.
The reprinting, distribution, reproduction, exploitation in any form and 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, figures and descriptions are for explanation and presentation of the document text and cannot be used as a basis for installation or design. All rights reserved.
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