P2099 (U5/Low Emissions)

DTC P2099 - POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 2

OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel system from the amount of sub feedback control.
Judge NG when the sub feedback learning value sticks to rich sides during sub feedback learning control.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Perform the diagnosis continuously at a constant speed 50 to 100 km/h (31 to 62 MPH).

DIAGNOSTIC METHOD




Judge NG when the continuous time of completing the malfunction criteria becomes more than 5 seconds. Judge OK when it becomes less than 5 seconds.

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When OK with similar drive in 3 drive cycles.
- When "Clear Memory" was performed

FAIL SAFE
None

ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)