E39 / P1133 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE lamp on.
O2S1 Bank 1 Insufficient Number of Transitions
Fault symptom
CHECK ENGINE lamp on.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| General conditions for this DTC |
| Engine temperature above 69°C. |
| Battery voltage must be between 11 - 16 V. |
| Engine running longer than 60 s. |
| Engine speed between 1000 and 3500 rpm. |
| Preheating active for more than 40 s. |
| The ethanol content is lower than 87%. |
| Atmospheric pressure more than 70 kPa. |
| Closed loop lambda control active. |
Fault criteria:
| O2S1 Bank 1 Insufficient Number of Transitions |
OK report:
| Fault criteria NOT fulfilled. |
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:
| Worn/sluggish/contaminated oxygen sensor. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
