ECM monitor and calculate Engine Torque use the internal eletric circuit and sensors.
P12BF is set When actual Engine torque is not match with calculated torque. If P12BF output, It must be check for RPS, CKP, CLUTCH SWITCH, BRAKE SWITCH.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Torque monitoring | ● ECM | ||
Enable Conditions | ● Engine running | |||
Threshold Value | ● - | |||
Diagnostic Time | ● immediately | |||
Fail Safe | Fuel Cut | NO | ||
EGR Off | NO | |||
Fuel Limit | YES | |||
Check Lamp | YES |
ECM Component Inspection
IG KEY "OFF", ENGINE "OFF".
Disconnect ECM.
Replace ECM, check if abnormal operations disappear.
If problems are corrected, replace ECM.
Input injector IQA data(7 letters) using GDS at replacing ECM.
Enter the driving distance - how many km the CPF is used- into New ECM with scanner.
For immobilizer applied vehicle, input pin code.
After a repair, it is essential to verify that the fault is corrected.
After connecting GDS select "Diagnostic Trouble Codes(DTCs)" mode to and then clear DTC.
Drive the vehicle within DTC Enable conditions in General information.
After selecting "Diagnostic Trouble Codes(DTCs)" mode and check DTC is recorded again.
Are any DTCs recorded ?
![]() | ▶ Go to the DTC guide of recorded NO. in GDS |
![]() | ▶ System operates within specification. |