E39 / P0131 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
O2S Circuit. Low Voltage. Sensor 1.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The following diagnostic trouble codes may not be generated: |
| P0201, P0202, P0203, P0204 |
| P0261, P0262, P0264, P0265, P0267, P0268, P0270, P0271 |
| P0442, P0443, P0446, P0449, P0452, P0453, P0455, |
| P1248, P1249, P124A, P124B |
| P2147, P2148, P2150, P2151, P2153, P2154, P2156, P2157 |
| Battery voltage must be between 11 - 16 V. |
| EVAP, leak diagnosis not active, if OBDII. |
| Lambda control active for more then 5 s. |
| The ethanol content is lower than 87%. |
Fault criteria:
| When voltage across the sensor is less than 50 mV for 50 s. |
Dependent:
System reaction to a fault:
Fault handling:
| (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. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
