P1373

P1373

Valve lift control, above limit value

NOTE: EXTREMELY IMPORTANT TO OBSERVE.

- For this diagnostic, the cylinder preceding in the firing order can also be affected.
- If misfires are entered simultaneously (P0300 to P0306), these must be worked through first.
- If only valve lift errors are entered, please also check the cylinders preceding in the firing order.
- Example: If the valve lift error for cylinder 4 (bank 2) is entered, the mechanism of the valve lift switching of cylinder 2 (bank 1) is also to be checked (firing order: 1-6-2-4-3-5).
- Valve lift error detected via evaluation of rough running, similar to detecting misfiring.
- Parity check errors during valve lift control only entered together with cylinder-specific faults.

Diagnostic conditions
- Engine idling

Possible fault causes
- Valve(s) of a cylinder stay jammed in large stroke
- Valves of different cylinders stay jammed in large stroke (parity check error)
- Please read the information at the beginning of the document.