If the upstream lambda sensor signal is stuck lean under engine over-run condition, ECM sets P219500.
Item | Detecting Condition | Possible Cause | |
DTC Strategy |
•
Voltage monitoring | 1. Poor connector connection 2. Faulty Injectors 3. Air leak 4. Faulty upstream lambda sensor | |
Enable Conditions |
•
Engine running | ||
Threshold Value |
•
Lean signal is detected under engine over-run condition | ||
Diagnostic Time |
•
500 msec. | ||
Fail Safe | MIL |
•
On | |
