If customers complain that the engine is losing power and the engine malfunction indicator light is activated for this vehicle, and that the motor is rough idling and running irregularly, this could possibly be caused by 'wear in the actuating drive of the throttle valve'.
The following error codes may be saved in the 'engine' system's event memory.
Error code `the same as`:
- P1580, (17988) `Throttle valve actuating drive malfunction`.
The cause of this error on vehicles with the above engine type (common rail diesel engine/Volkswagen), is not necessarily mechanical clamps or coking in the throttle valve area, but can be caused by extreme wear on the drive pinion (plastic pinion) of the actuating drive. The wear results in loss of adhesion, meaning that the throttle valve can no longer follow the control unit controls.
The actuating drive can be visually inspected by dismantling the cover. When wear is visible, the complete throttle valve piece must be replaced including the throttle valve and actuating drive.
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.
Not helpful at all
Very helpful