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DTC P0108 [MZR-CD (RF Turbo)]

BME010200100W25

DTC P0108 | Boost sensor circuit high input
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DETECTION CONDITION | • PCM monitors input voltage from boost sensor while engine is running. If input voltage from boost sensor is above 4.9 V, PCM determines boost sensor circuit high input.
POSSIBLE CAUSE | • Boost sensor malfunction • Connector or terminal malfunction • Boost sensor power and signal wiring short each other • Open circuit in wiring between boost sensor terminal B and PCM terminal 36 • Open circuit in wiring between boost sensor terminal A and PCM terminal 91
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | PERFORM DTC CONFIRMATION PROCEDURE • Perform "DTC Confirmation Procedure". (See DTC CONFIRMATION PROCEDURE [MZR-CD (RF Turbo)].) • Is same DTC present during KOEO or KOER self-test? | Yes | Go to next step.
No | Intermittent concern exists. Go to "Intermittent Concern Troubleshooting". (See INTERMITTENT CONCERN TROUBLESHOOTING [MZR-CD (RF Turbo)].)
2 | INSPECT POOR CONNECTION OF BOOST SENSOR CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 7.
No | Go to next step.
3 | INSPECT BOOST SENSOR CIRCUIT FOR SHORT WITH EACH OTHER • Turn engine switch to OFF. • Inspect continuity between boost sensor terminals C and B • Is there continuity? | Yes | Repair or replace harness for short with each other, go to Step 7.
No | Go to next step.
4 | INSPECT BOOST SENSOR • Inspect boost sensor. (See BOOST SENSOR INSPECTION [MZR-CD (RF Turbo)].) • Is there any malfunction? | Yes | Replace boost sensor, go to Step 7. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
5 | INSPECT POOR CONNECTION OF PCM CONNECTOR • Turn engine switch to OFF. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair or replace suspected terminal, go to Step 7.
No | Go to next step.
6 | INSPECT BOOST SENSOR CIRCUIT FOR OPEN • Turn engine switch to OFF. • Inspect continuity between following harnesses:

  - Boost sensor terminal B and PCM terminal 36.
  - Boost sensor terminal A and PCM terminal 91.

• Is there continuity?
Yes
Go to next step.
No | Repair or replace harness for open, go to next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0108 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear DTC from PCM memory using WDS or equivalent. • Perform KOEO/KOER self-test. (See KOEO/KOER SELF-TEST PROCEDURE [MZR-CD (RF Turbo)].)
• Is same DTC present?
Yes
Replace PCM, go to next step.
(See PCM REMOVAL/INSTALLATION [MZR-CD (RF Turbo)].)
No | Go to next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [MZR-CD (RF Turbo)].) • Is there any DTC present? | Yes | Go to applicable DTC inspection. (See DTC TABLE [MZR-CD (RF Turbo)].)
No | Troubleshooting completed.