DTC P0108 [MZR-CD (RF Turbo)]

BME010200100W25

DTC P0108

Boost sensor circuit high input

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

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform "DTC Confirmation Procedure".
• Is same DTC present during KOEO or KOER self-test?
Yes
Go to next step.
No
Intermittent concern exists. Go to "Intermittent Concern Troubleshooting".
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.
• Is there any malfunction?
Yes
Replace boost sensor, go to Step 7.
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.
• Is same DTC present?
Yes
Replace PCM, go to next step.
No
Go to next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC inspection.
No
Troubleshooting completed.