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Home >> Kia >> 2002 >> Optima SE, 2.7 8 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.7L >> Diagnostic Tests >> DTC P0452: EVAP Emission Control System Pressure Sensor Low Input, DTC P0453: EVAP Emission Control System Pressure Sensor High Input & DTC P0454: EVAP Emission Control System Pressure Sensor Intermittent >> Test Procedure
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Test Procedure

  1. Turn ignition off. Connect Hi-Scan Pro/Kia Data Pro Scan tool or equivalent to OBD-II Data Link Connector. See Figure. Turn ignition on. Monitor for other DTCs. If other DTCs are set, do all repairs associated with those DTCs before continuing with this procedure. If no other DTCs are set, go to next step.
  2. Using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent, monitor FTP sensor output voltage. Voltage should be 2-3 volts. If voltage is not as specified, go to next step. If voltage is as specified, problem is intermittent. Check FTP sensor and ECM for proper harness connections and go to step  8.
  3. Turn ignition off. Thoroughly check FTP sensor harness connector terminals for loose, bent, corroded, contaminated, deteriorated or damaged connector terminals. If connector terminals are okay, go to next step. If connector and terminals are faulty, repair or replace as necessary and go to step  8.
  4. Disconnect FTP sensor 3-pin harness connector. See Fig 1. Turn ignition on. Measure voltage between ground and FTP sensor connector terminal No. 3 (Light Blue/Black wire). Voltage should be approximately 5 volts. If voltage is as specified, go to next step. If voltage is not as specified, repair open circuit or short circuit as necessary and go to step  8.
  5. Turn ignition off. Disconnect ECM harness connector "F". See Figure. Turn ignition on. Measure voltage between ground and FTP sensor connector terminal No. 1 (Violet wire). Voltage should be below 0.5 volts. If voltage is as specified, go to next step. If voltage is not as specified, repair short circuit as necessary and go to step  8.
  6. Turn ignition off. With FTP sensor and ECM harness connectors disconnected, measure resistance between FTP sensor connector terminal No. 1 (Violet wire) and ECM connector terminal F34. Also measure resistance between FTP sensor connector terminal No. 2 (Black/White wire) and ECM connector terminal F14. Both resistances should be below one ohm. If resistances are as specified, go to next step. If any resistance is not as specified, repair open or short circuit as necessary and go to step  8.
  7. With FTP sensor and E/TCM harness connectors disconnected. Measure resistance between FTP sensor connector terminals No. 1 (Violet wire) and No. 2 (Black/White wire). Measure resistance between terminals No. 1 (Violet wire) and No. 3 (Light blue/Black wire). Measure resistance between terminals No. 2 (Black/White wire) and No. 3 (Light blue/Black wire). All resistances should be infinite. If resistances are as specified, temporarily install a Known-good FTP sensor and check for proper operation. If problem is corrected, replace FTP sensor and go to next step. If any resistance is not as specified, repair short circuit as necessary and go to next step.
  8. After repair, return vehicle to original condition. Clear codes using Hi-Scan Pro/Kia Data Pro Scan tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.
Fig 1: Identifying Fuel Tank Pressure Sensor Connector Terminals
G00057022Courtesy of KIA MOTORS AMERICA, INC.
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