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Home >> Hyundai >> 2017 >> Elantra Value Edition >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (3 Of 3) >> DTC P2127-00: Accelerator Position Sensor 2 Signal Circuit Low Input >> DTC Inspection >> GDS data analysis
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GDS data analysis

  1. Connect GDS and select "DTC Analysis" mode
  2. Warm up the engine.
  3. Monitor the parameters related to DTC on the "Current Data" menu of the GDS (Fig 1) while press and depress gas pedal.
    Fig 1: Scantool Display - Data Analysis
    G12029892Courtesy of HYUNDAI MOTOR AMERICA
  4. Data Analysis
    Condition GDS Sensor Data
    APS 1 APS 2
    IG Key "ON" & Engine "OFF" Output voltages of APS 1 and APS 2 are in proportion to accelerating. APS 2 output voltage is half of APS 1 output voltage.
    Release a pedal fully 0.58~0.93V 0.29~0.47V
    Depress a pedal fully 3.85~4.35V 1.93~2.18V
  5. Is data in accordance with "Data Analysis"?

    YES 

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Go to next step.