P0105-TURBOCHARGER INLET PRESSURE SENSOR SIGNAL VOLTAGE TOO LOW
For a complete wiring diagram Refer to Section 8W
- When Monitored:
With the ignition on.
- Set Condition:
The Boost Pressure Sensor signal voltage is below 0.29 volt for 0.5 seconds.
| Possible Causes |
| BOOST PRESSURE SENSOR 5-VOLT SUPPLY CIRCUIT OPEN |
| BOOST PRESSURE/INTAKE AIR TEMPERATURE SENSOR |
| BOOST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND |
| BOOST PRESSURE SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER |
| BOOST PRESSURE SENSOR SIGNAL CIRCUIT OPEN |
| ENGINE CONTROL MODULE |
Diagnostic Test
1. READ THE BOOST PRESSURE SENSOR VOLTAGE ON THE SCAN TOOL
NOTE: If DTC P0641, P0651 or P0697 is present with this DTC, diagnose DTCs P0641, P0651 or P0697 before diagnosing this DTC.
Turn the ignition on.
With the scan tool, read the Boost Pressure Sensor voltage.
Is the voltage below 0.2 volt?
Yes
- Go To2
No
- Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
2. SENSOR REFERENCE VOLTAGE B CIRCUIT OPEN
Turn the ignition off.
Disconnect the Boost Pressure/IAT Sensor harness connector.
Turn the ignition on.
Measure the voltage between ground and the Boost Pressure Sensor 5-Volt Supply circuit.
Is the voltage above 4.9 volts?
Yes
- Go To3
No
- Repair the Boost Pressure Sensor 5-Volt Supply circuit for an open.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
3. BOOST PRESSURE/INTAKE AIR TEMPERATURE SENSOR
Turn the ignition off.
Connect a jumper wire between the Boost Pressure Sensor Signal and Boost Pressure Sensor 5-Volt Supply circuits.
Turn the ignition on.
With the scan tool, read the Boost Pressure Sensor voltage.
Is the Boost Pressure Sensor voltage above 4.5 volts?
Yes
- Replace the Boost Pressure/Intake Air Temperature Sensor.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
- Go To4
4. BOOST PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Boost Pressure Sensor Signal circuit.
Is the resistance above 1000 ohms?
Yes
- Go To5
No
- Repair the Boost Pressure Sensor Signal circuit for a short to ground.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
5. BOOST PRESSURE SENSOR SIGNAL AND GROUND CIRCUITS SHORTED TOGETHER
Measure the resistance between the Boost Pressure Sensor Signal circuit and Sensor Ground circuit.
Is the resistance above 1000 ohms?
Yes
- Go To6
No
- Repair the Boost Pressure Sensor Signal circuit for a short to the Sensor Ground circuit.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
6. BOOST PRESSURE SENSOR SIGNAL CIRCUIT OPEN
Measure the resistance of the Boost Pressure Sensor Signal circuit.
Is the resistance below 10.0 ohms?
Yes
- Go To7
No
- Repair the Boost Pressure Sensor Signal circuit for an open.
- Perform the ECM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
7. ENGINE CONTROL MODULE
If there are no possible causes remaining, view repair.
Repair
- 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).