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Home >> Hyundai >> 2017 >> Sonata Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 32 (Engine Control System Diagnosis - 2.0L (1 Of 3) (Except HEV)) >> DTC P0088: Fuel Rail System Pressure - Too High >> Component Inspection

Component Inspection

WARNING: This page is about a different variant/trim than selected.

■ Rail Pressure Sensor Inspection 

  1. IG "OFF".
  2. Connect probe to signal terminal of rail pressure sensor connector.
  3. Measure waveform of signal line of rail pressure sensor during acceleration and deceleration.

    Specification:  voltage of rail pressure sensor is increased during acceleration.

  4. Is waveform within specification?

    YES 

    • Check for poor connection between PCM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Substitute with a known - good rail pressure sensor and check for proper operation. If the problem is corrected, replace rail pressure sensor and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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