ME9 / P2243 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 1 Reference Voltage Circuit, Open
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
Battery voltage should be between 10.7 and 16 Volts. |
NONE of the following DTCs must be detected: |
Fault criteria:
The O2S 1 signal is less than 0.2 V or greater than 4.7 V for more than 1 second. |
Open circuit on the lead between control module pin A19 and sensor pin 6. |
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:
• | Short Term Fuel Trim Status |
(See also description of readings/activations in diagnostic tool) |