Component Location - Hyundai GENESIS COUPE BK 2010 Manual

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS 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"?
▶ System performing to specification at this time. Clear the DTC.
▶ Go to the applicable troubleshooting procedure.
Fuel System > Engine Control System > P2138 Accelerator Position Sensor 1 & 2 Signal
Voltage Correlation

Component Location

General Description
The Electronic Throttle Control(ETC) system is made of the components throttle body, Throttle Position Sensor(TPS)
1&2 and Accelerator Position Sensor(APS) 1&2. The APS is mounted in the accelerator pedal to detect the opening
angle of the accelerator pedal. It has 2 sensors to detect the accelerator position and a malfunction of the accelerator
position sensor. The ECM judges the current opening angle of the accelerator pedal from APS1&2, and the ECM
controls the throttle motor based on these signals.
DTC Description
Checking output signals from APS 1 and 2 under detecting condition, if output signals difference between APS 1 and 2
are detected more than 4.5% for the specified number of times., ECM sets P2138. And then MIL(Malfunction Indication
Lamp) turns on.
DTC Detecting Condition
Item
DTC Strategy
Enable Conditions
Detecting Condition
• This code detects a correlation error between APS 1
and APS 2.
• Ignition "ON"
Possible cause
• Poor connection
• Open or short in APS circuit