E39 / P2270 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE lamp on.
O2S 2 Signal, Stuck Lean
Fault symptom
CHECK ENGINE lamp on.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The following diagnostic trouble codes may not be generated: |
| P0111, P0112, P0113, P0114 |
| P0116, P0117, P0118, P0119 |
| P0201, P0202, P0203, P0204 |
| Battery voltage must be between 11 - 16 V. |
| Engine speed between 1200 and 2200 rpm. |
| Engine running longer than 60 s. |
| Engine speed between 1000 and 3500 rpm. |
| Preheating active for more than 180 s. |
| Closed loop lambda control active. |
| Vehicle speed between 65-119 Km/h. |
| EVAP, leak diagnosis inactive (if OBD II). |
| Calculated catalytic converter temperature between 500-900°C. |
Fault criteria:
| When the voltage across the sensor has not exceed 875 mV. |
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) |
