OBD-II · Engine and powertrain (P)
P02E2
Diesel intake air flow control (throttle) circuit low
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 throttle motor control circuit voltage is below the valid range.
Symptoms
- engine warning light
- possibly reduced power (limp mode)
- engine may shake when switched off
Likely causes, most likely first
| No. | Cause |
|---|---|
| 01 | control wire shorted to ground |
| 02 | failed throttle motor |
| 03 | corroded connector |
What to check, step by step
- 01Inspect connector and wiring.
- 02Measure motor resistance.
- 03Check for a short to ground.
- 04Replace the throttle unit if faulty.