- 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
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