P161B

General Description

Comparing actual torque and desired torque, ECM diagnoses calculated torque state. Actual torque keeps lower than desired torque, ECM checks if actual torque is higher than desired torque. dividing condition into two state, dynamic and steady states, ECM applies different diagnosis logic. Because the responses due to this code is similar to that of MAF control error, checking MAF at first.

DTC Description

If the actual torque is higher than the desired torque, an error is recognized. And ECM sets P161B and MIL(Malfunction Indication Lamp) turns on.

DTC Detecting Condition





Monitor Scantool Data

1. Connect scantool to Data Link Connector(DLC).
2. IG "ON".
3. Select "DTC" button, and then Press "DTC Status" to check DTC's information from the DTCs menu.
4. Read "DTC Status" parameter.




5. Is parameter displayed "Present fault"?�






Terminal and Connector inspection

1. Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found?






System Inspection

Check air leakage
1. Check contamination or installation of Gasket
> Check throttle body gasket
> Check gasket between intake manifold and surge tank.
> Check contamination or clog by foreign material of gasket between intake manifold and injector.
> Check contamination or open stuck resulting from foreign material between surge tank and PCSV.
2. Is there any air leakage ?





Check exhaust system for clogging
1. Check exhaust system.
> Clogged or broken muffler
> Broken catalyst
2. Is the exhaust system clogged ?





Check exhaust system for clogging
1. IG "OFF".
2. Remove air hose between throttle body and airflow sensor.
3. Check if throttle valve is stuck by foreign material.
4. Is the throttle valve normal ?





** Procedure of ETS Initialization
A. Erase the trouble codes on ECM
B. Turn the ignition key off and keep this condition until the main relay is turned off.(It will take 10sec.)
C. Turn ignition key on more than 1second to record the throttle motor position on the EEPROM

Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect scantool and select "DTC" button.
2. Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History(Not Present) fault"?