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OBD-II · Engine and powertrain (P)

P02E0

Diesel intake air flow control (throttle) circuit/open

What it means

Diesels have an electronic intake throttle that controls air flow for EGR and DPF regeneration and closes at switch-off to stop the engine shuddering. The engine computer sees an open circuit in the throttle motor control.

Symptoms

  • engine warning light
  • possibly reduced power (limp mode)
  • engine may shake when switched off

Likely causes, most likely first

Likely causes, most likely first
No.Cause
01failed throttle motor
02unplugged or corroded connector
03broken wiring

What to check, step by step

  1. 01Inspect connector and wiring at the throttle.
  2. 02Measure motor resistance against specification.
  3. 03Check wiring continuity to the engine computer.
  4. 04Replace the throttle unit if faulty; run an adaptation if required.