ME9 / P2626 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Malfunction Indicator Lamp
O2S 1 Pumping Current Trim 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. |
Sensor in normal operating range (715°C and up). |
Fault criteria:
Trim circuit voltage is over 4.8 V for 2 seconds or 600 seconds if fuel level is less than 12%. |
Open circuit on the lead between control module pin A35 and sensor pin 5. |
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) |