ME9 / P2297 00
Symptom: Malfunction Indicator Lamp
O2S 1 Performance Fault During Decel Fuel Cut-Off
Fault symptom
Malfunction Indicator Lamp
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage should be between 10.7 and 16 Volts. |
| Oxygen sensor within normal operating temperature. |
| Requested lambda less than 1.6. |
| Internal O2S1 signal is less than 4.8 V. |
| Fuel cut-off (engine brake) occurred 10 times. |
Fault criteria:
| The correction factor for pump flow is less than 0.75 or greater than 1.3. |
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-out sensor. Engine management system can no longer compensate for sensor operation. |
Functions in the diagnostic tool related to the fault:
| • | Short Term Fuel Trim Status |
| (See also description of readings/activations in diagnostic tool) |
