- Varying idle speed (+/- 100 rpm).
- Engine jerks while idling.
- Engine does not accelerate properly.
- Engine jerks when accelerator pedal is released.
Under certain circumstances the engine warning light (Figure 1) will also turn on and the fault code P0505 may be stored (Figure 3).
Screenshot: Diagnosis with Hella-Gutmann_mega macs
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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