P1137

P1137

02S Circuit. Low Voltage. Sensor 2.







Fault symptoms
- CHECK ENGINE.

On-Board Diagnostics

Type of diagnosis:
- Continuous. Terminated when fault criteria fulfilled. Restarts next driving cycle.

Enable criteria:
- Engine load over 150 mg/c. Coolant temperature more than 60°C. Preheating act longer than 4 s. Preheating current exceeds 300 mA. Closed loop active longer than 5 s. Closed loop between 20 and -20%. No Fuel shut-off.

Fault criteria:
- 02S2 voltage is between 0.05 and 0.3 V for longer than 90 s.

Dependents :
- P0137, P0138 and 0140.

System reaction to a fault:
- Transition adaptation of closed loop is blocked.

OK report:
- Enable criteria fulfilled and 120 s has expired without a fault report.

Fault handling: (For more information, see Fault handling III, Other emission-related components and functions.) Fault Handling III, Other Emission-Related Component & Function
- Type III.

Diagnostic help
Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault:
- Diagnostic status for the diagnosis.
- Oxygen Sensor Value, unit V.

For more information, see Menu "Read Values". Tech 2 Menu Structure, DTC Menu, Read Value, Activate, Sys Info


NOTE: Oxygen sensor receives reference oxygen from the surrounding air via the connecting cables. For this reason, electrical contact spray or grease must not be used on the oxygen sensor connector.


Checking the wiring
Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.