E39 / P0135 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 1 Preheater Circuit Performance Problem
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| The following diagnostic trouble codes may not be generated: |
| P0116, P0117, P0118, P0119 |
| Battery voltage should be between 10.7 and 18 Volts. |
Fault criteria:
| When the current across the sensor exceeds 2.5 A or is below 0.3 A for more than 60 seconds. |
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) |
