On-Board Diagnostics

Type of diagnosis: 

• Once per driving cycle. Interrupted when fault criteria fulfilled or OK reported. Restarts next driving cycle.

Enable criteria 

• General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.
• Engine running. Closed loop active. Coolant temperature above 70°C. Sensor pre-heating active. Vehicle speed above 0. A counter accumulates the time during which all the conditions are fulfilled. Another counter accumulates changes in sensor voltage.

Fault criteria 

• Accumulated voltage change less than 500 mV when time counter reaches 500 s.

Dependents 

• P0116 , P0117 , P0118 , P0501 , P0502 , P1141  and P1142 .

System reaction to a fault 

• Transition adaptation of closed loop is blocked.

OK report 

• P0140  diagnosis performed once and fault criteria not fulfilled. Fault criteria for P0138  not fulfilled.

Fault handling:  (For more information, see FAULT HANDLING III, OTHER EMISSION-RELATED COMPONENTS AND FUNCTION ).

• Type III.