Procedure
In order to establish whether the diagnostic trouble code has been generated in error, follow the instructions below.
- Clear the diagnostic trouble code using Tech 2
- Test drive the car for two driving cycles of approx. 5 minutes each (city driving). Make sure that the ignition key is in the OFF position for at least 5 seconds between the two driving cycles.
- Read the diagnostic trouble codes using Tech 2 following the second driving cycle.
- If the diagnostic trouble code has not reoccurred it was generated in error. If it does reoccur then follow normal fault diagnosis. NOTE: The above fault diagnosis is performed in order to avoid unnecessary replacement of ECM modules. New software which rectifies the fault is being released.
Diagnostic trouble code P0106 exists to detect two faults by measuring the pressure in the intake manifold at rapid throttle closure. One fault is a too slow reaction on the absolute pressure sensor and the other is too high pressure in the intake manifold (which indicates air leakage).
When the throttle closes at high engine speed the pressure in the intake manifold must drop below 50 kPa within a certain time. If the pressure does not drop sufficiently or quickly enough then there is a problem with the absolute pressure sensor or leakage somewhere at the intake manifold.
- See «CHECK CAMSHAFT SETTING»(ref-275839-S24087818622007122900000)
The DTCs indicate that the evap canister purge valve (321) is defective. Many of these valves are being replaced despite being fault free.
To establish whether the DTCs have been actuated incorrectly, follow the instructions below.
- Make sure the filler cap is intact and fitted tightly. The DTCs can be generated if the filler cap is loose.
- If the system has been leak tested and there are no leaks present, do not change the evap canister purge valve.
- Clear the DTCs and inform the customer how important it is to fit the filler cap tightly after refuelling.
