P0140

P0140 00

O2S Circuit. No Activity Detected. Sensor 2.







Fault symptom
- Check Engine

On-board diagnosis

Type of diagnosis:
- Continuous

Enable criteria:
- Lambda control active for more then 5 s.
- Battery voltage must be between 11 - 16 V.
- Engine running (with at least 7700 combustions).
- Preheating active for more than 4 s.
- Fuel shut-off for more than 7 s.

Fault criteria:
- When voltage across sensor has not been below 400 mV after a 7 second fuel shut-off.

Dependent:
- None

System reaction to a fault:
- Preheating is switched off.
- Adaption of rear oxygen sensor is blocked and reset.

OK report:
- Diagnosis completed without fault report.

Fault handling:
- Type III
(See section Fault handling III, "Other emission-related components and functions" for more information.)

Checking the wiring harness
- Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.

Diagnostic help

Diagnosis regards:
- Electrical fault in connecting leads or component.
- The voltage across a defective sensor is 0.40 V - 0.50 V. OK if it exceeds 0.55 V.

Functions in the diagnostic tool related to the fault:

Test value:
- O2S 2
(See also description of readings/activations in diagnostic tool)