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Retrieving Codes

NOTE: Ensure battery voltage is proper before retrieving codes.
  1. Turn ignition switch to OFF position. Connect either a voltmeter between MPI diagnostic terminal and ground terminal of diagnostic connector, or Multi-Use Tester (Scan Tool) (09391-33200 ) to diagnostic connector and cigarette lighter. See Fig 1 . Turn ignition switch to ON position and disclosure of ECU memory (fault codes) will begin.
  2. If using voltmeter to retrieve fault codes, it is important that voltage signals are accurately timed. Signals will appear in long and short pulses. Long pulses represent the first digit of the fault code. Short pulses represent the second digit. For example, one long pulse followed by 5 short pulses represents Code 15 (or Item No. 15 in CODE CHARTS  ).
  3. If using scan tool and malfunction indicator light comes on while various checks are being made, check self-diagnostic output.
  4. After all checks have been made and/or trouble codes have been recorded, make necessary repairs. After repairs have been made, retest component(s) to ensure problem has been corrected.
Fig 1: Locating Self-Diagnostic Connector (Except Excel)
G90D19656Courtesy of HYUNDAI MOTOR CO.
Fig 2: Locating Self-Diagnostic Connector (Excel)
G50B07318Courtesy of HYUNDAI MOTOR CO.
DIAGNOSTIC CODES - EXCEL, SCOUPE & PRECIS

Code Number Fault Item (1) Probable Cause See:
(2) ECU Faulty ECU ECU LOCATION 
11 O2 Sensor Fuel Press., Injectors, Vac. Leak, O2 Sens. Figure
12 Airflow Sensor Airflow Sensor Figure
13 Intake Air Temp. Sensor Intake Air Temp. Sensor Figure
14 Throttle Position Sensor Throttle Position Sensor, Idle Switch Figure
15 Motor Position Sensor Motor Position Sensor Figure and Figure
21 Coolant Temperature Sensor Coolant Temperature Sensor Figure
22 Crank Angle Sensor Crank Angle Sensor Figure and Figure
23 TDC Sensor (No. 1 Cylinder) Distributor
24 Vehicle Speed Sensor Reed Switch VSS Reed Switch
25 Barometric Pressure Sensor Barometric Pressure Sensor Figure
41 Fuel Injector Injector Coil Resistance Figure and Figure
42 Fuel Pump Control Relay Figure
43 EGR Temp. Sensor (Calif. Only) EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac. Figure
44 Ignition Coil & Power Transistor Ignition Timing Figure
(1) Faulty components, harnesses and connectors are always a probable cause for setting a fault code.
(2) No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.
DIAGNOSTIC CODES - SONATA 2.4L

Code Number Fault Item (1) Probable Cause See:
(2) ECU Faulty ECU ECU LOCATION 
11 O2 Sensor Fuel Press., Injectors, Vac. Leak, O2 Sens. Figure
12 Airflow Sensor Airflow Sensor Figure
13 Intake Air Temp. Sensor Intake Air Temp. Sensor Figure
14 Throttle Position Sensor Throttle Position Sensor, Idle Switch Figure
15 Motor Position Sensor Motor Position Sensor Figure and Figure
21 Coolant Temperature Sensor Coolant Temperature Sensor Figure
22 Crank Angle Sensor Crank Angle Sensor Figure and Figure
23 TDC Sensor (No. 1 Cylinder) Distributor
24 Vehicle Speed Sensor Reed Switch VSS Reed Switch
25 Barometric Pressure Sensor Barometric Pressure Sensor Figure
41 Fuel Injector Injector Coil Resistance Figure and Figure
42 Fuel Pump Control Relay Figure
43 EGR Temp. Sensor (Calif. Only) EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac. Figure
44 Ignition Coil & Power Transistor Ignition Timing Figure
(1) Faulty components, harnesses and connectors are always a probable cause for setting a fault code.
(2) No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.
DIAGNOSTIC CODES - SONATA 3.0L

Code Number Fault Item (1) Probable Cause See:
(2) ECU Faulty ECU ECU LOCATION 
11 O2 Sensor Fuel Press., Injectors, Vac. Leak, O2 Sens. Figure
12 Airflow Sensor Airflow Sensor Figure
13 Intake Air Temp. Sensor Intake Air Temp. Sensor Figure
14 Throttle Position Sensor Throttle Position Sensor, Idle Switch Figure
21 Coolant Temperature Sensor Coolant Temperature Sensor Figure
22 Crank Angle Sensor Crank Angle Sensor Figure and Figure
23 TDC Sensor (No. 1 Cylinder) Distributor
24 Vehicle Speed Sensor Reed Switch VSS Reed Switch
25 Barometric Pressure Sensor Barometric Pressure Sensor Figure
41 Fuel Injector Injector Coil Resistance Figure and Figure
42 Fuel Pump Control Relay Figure
43 EGR Temp. Sensor (Calif. Only) EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac. Figure
44 Ignition Coil & Power Transistor Ignition Timing Figure
(1) Faulty components, harnesses and connectors are always a probable cause for setting a fault code.
(2) No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.
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