E39 / P0054 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE lamp on.
O2S 2 Heater Resistance, Out of Range
Fault symptom
CHECK ENGINE lamp on.
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The following diagnostic trouble codes may not be generated: |
| Engine switched off for more than 8 hours. |
| Engine temperature upon start is lower than 45 °C. |
Fault criteria:
| The resistance across the sensor is outside of the calibrated range. |
Checking the wiring harness
Jiggle the wiring harness at several points to detect intermittent breaks or short circuits. Check also the connector for oxidation or loose pins.
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) |
