If the lambda controller reaches the maximum or minimum threshold, then feedback control is no longer possible and emissions will be increased. The ECM/PCM 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 the deviation of long term fuel trim | 1. Air leakage in exhaust System 2. HO2S 3. TWC |
Enable Conditions |
•
Canister Purge not in RAMP_OPEN (Canister Load learning)
•
Downstream O2 sensor Trim I-control active
•
11V < Battery voltage < 16V | |
Threshold Value |
•
Trim value(Lambda value) > 0.04 | |
Diagnostic Time |
•
60 sec. | |
MIL On Condition |
•
2 driving cycles |
