If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions will be increased. The PCM/ECM sets DTC P2096 if no proportional post catalyst fuel trim adaptation occurs for a defined time after the lambda controller has reached its maximum threshold.
Item | Detecting Condition | Possible Cause |
DTC Strategy |
•
Monitoring deviation of fuel trim control(long term) | 1. Air leakage in exhaust System 2. HO2S 3. TWC |
Enable Conditions |
•
Lambda control active
•
No relevant failure
•
Dynamic fuel trim is active
•
Canister purge valve not opening or closing | |
Threshold Value |
•
Adaptation value > 630 msec. | |
Diagnostic Time |
•
60 sec. | |
MIL On Condition |
•
2 Drive Cycles |
