P0125

DTC P0125 - INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL

OUTLINE OF DIAGNOSIS
Detect the malfunction of engine coolant temperature sensor output property.

Judge NG when the engine coolant temperature does not increase after engine starting in spite of the driving condition that it seems to increase.




ENABLE CONDITION

GENERAL DRIVE CYCLE
Always perform the diagnosis until the engine coolant temperature becomes 20 °C (68 °F) after starting engine with cooled condition or until NG is judged once.

DIAGNOSTIC METHOD




Judge NG when the malfunction criteria are completed. Judge OK and clear NG when the engine coolant temperature is more than 20 °C (68 °F) or more.

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 the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed

FAIL SAFE
Keep engine coolant temperature at 70 °C (158 °F).

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