P0105-TURBOCHARGER INLET PRESSURE SENSOR SIGNAL VOLTAGE TOO HIGH

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on.
Set Condition:
The Boost Pressure Sensor signal voltage is above 4.79 volts for 0.5 seconds.

Possible Causes

BOOST PRESSURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE

BOOST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

BOOST PRESSURE SENSOR GROUND CIRCUIT OPEN

BOOST PRESSURE SENSOR

POOR CONNECTOR TERMINAL CONTACT

ENGINE CONTROL MODULE (INTERNAL)

ENGINE CONTROL MODULE (SENSOR SIGNAL SHORTED TO VOLTAGE)

Diagnostic Test

1.CHECKING FOR CURRENT DTC

NOTE: If a P0234 or P0299 DTC is present with this DTC, diagnose P0234 or P0299 DTC before continuing.

NOTE: If DTC P0641, P0651 or P0697 is present with this DTC, diagnose DTCs P0641, P0651 or P0697 before diagnosing this DTC.

NOTE: If the ECM detects and stores a DTC, the ECM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the scan tool at the same time the DTC is displayed.

NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC.

NOTE: Ensure all turbocharger inlet and outlet tubes are connected properly, without damage and restriction before continuing with this test. Also ensure the wastegate actuator and actuator rod are attached and functioning properly.

Did this DTC set again?

Yes

Go To2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.MEASURE THE BOOST PRESSURE SENSOR SIGNAL CIRCUIT VOLTAGE

Is the voltage above 1.0 volt?

Yes

Go To3

Go To4

3.BOOST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

Is the voltage above 1.0 volt?

Yes

Repair the Boost Pressure Sensor Signal circuit for a short to voltage.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

4.BOOST PRESSURE SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE

NOTE: If the Sensor Ground circuit had a short to voltage on it, the ECM could be damaged. Retest the Fuel Pressure Sensor circuit.

Is the voltage above 1.0 volt?

Yes

Repair the Boost Pressure Sensor Ground circuit for a short to voltage. The ECM will need to be checked for proper operation before the repair is completed. A short to voltage on a ground circuit can damage the ECM.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To5

5.BOOST PRESSURE SENSOR GROUND CIRCUIT OPEN

Is the resistance below 10.0 ohms?

Yes

Go To6

Repair the Boost Pressure Sensor Ground circuit for an open.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

6.BOOST PRESSURE SENSOR

NOTE: Ensure all harness connectors are connected.

Is the voltage above 4.85 volts?

Yes

Replace the Boost Pressure Sensor.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Go To7

7.POOR CONNECTOR TERMINAL CONTACT

Did this DTC set again?

Yes

Replace and program the Engine Control Module in accordance with the Service Information.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Ensure good terminal contact between the Boost Pressure Sensor harness connector and the sensor. The repair is complete.
Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).