DTC P2096-Downstream Fuel Trim System 1 Lean: Notes
For a complete wiring diagram, refer to appropriate SYSTEM WIRING DIAGRAMS article.
- When Monitored:
With the engine running in closed loop mode, the ambient/battery temperature above (- 7°C) 20°F, altitude below 8500 ft.
- Set Condition:
If the PCM multiplies short term compensation by long term adaptive as well as a purge fuel multiplier and the result is below a certain value for 30 seconds over two trips, a freeze frame is stored, the MIL illuminates and a trouble code is stored. Two Trip Fault. Three good trips to turn off the MIL.
| Possible Causes |
|---|
| EXHAUST LEAK |
| ENGINE MECHANICAL |
| 1/2 O2 SENSOR |
| (K141) O2 SENSOR 1/2 SIGNAL CIRCUIT |
| (K299) O2 1/2 HEATER CONTROL CIRCUIT |
| (K904) O2 RETURN DOWNSTREAM CIRCUIT |
| FUEL CONTAMINATION |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding.