Pinpoint Test HN: Turbocharger System
NOTE:
To recreate the original conditions that set the DTC or caused the symptom, the vehicle may require driving.
Normal Operation and Fault Conditions
Refer to the DTC Fault Trigger Conditions.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| PCM P0034:00 | Turbocharger/Supercharger Bypass Valve "A" Control Circuit Low: No Sub Type Information | Sets when the PCM detects a short to ground from the turbocharger bypass valve (TCBY) circuit. This DTC only sets when the valve is commanded closed. |
| PCM P0035:00 | Turbocharger/Supercharger Bypass Valve "A" Control Circuit High: No Sub Type Information | Sets when the PCM detects an open circuit or high voltage from the turbocharger bypass valve (TCBY) circuit. This DTC only sets when the valve is commanded open. |
| PCM P0234:00 | Turbocharger/Supercharger "A" Overboost Condition: No Sub Type Information | This DTC sets when the turbocharger system TCBP PID value is greater than a calibrated threshold, or the turbocharger system TCBP PID value is greater than the turbocharger boost pressure (TCBP) desired value for a calibrated length of time. Check tubing for restrictions, cracks and incorrect fitting connections. Check the turbocharger wastegate regulating valve solenoid for correct operation. |
| PCM P0243:00 | Turbocharger/Supercharger Wastegate Actuator "A": No Sub Type Information | Sets when the PCM detects the TCWGM1+ and TCWGM1- circuits are reversed. Verify the TCWGM1+ and TCWGM1- circuit positions are correct in the harness connector. |
| PCM P0299:00 | Turbocharger/Supercharger "A" Underboost Condition: No Sub Type Information | Sets when the PCM detects the actual turbocharger boost pressure (TCBP) value is less than the desired turbocharger boost pressure (TCBP) value by 27.6 kPa (4 psi) or more for 5 seconds, indicating an under boost condition. Check tubing for restrictions, cracks and incorrect fitting connections. Check the turbocharger wastegate regulating valve solenoid for correct operation. |
| PCM P25B3:00 | Turbocharger/Supercharger Wastegate "A" Stuck Open: No Sub Type Information | Sets when the PCM detects the turbocharger wastegate 1 is at a greater angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern. |
| PCM P25B4:00 | Turbocharger/Supercharger Wastegate "A" Stuck Closed: No Sub Type Information | Sets when the PCM detects the turbocharger wastegate 1 is at a lower angle than commanded. Check the turbocharger wastegate motor linkage for stuck or binding concern. |
| PCM P2AB7:00 | Wastegate Position Sensor "A" Circuit: No Sub Type Information | Sets when the PCM detects the TCWP1 circuit voltage is greater than or less than a calibrated threshold. |
| PCM P2AB8:00 | Wastegate Position Sensor "A" Circuit Low: No Sub Type Information | Sets when the PCM detects the turbocharger wastegate position 1 sensor is out of self-test range low. |
| PCM P2AB9:00 | Wastegate Position Sensor "A" Circuit High: No Sub Type Information | Sets when the PCM detects the turbocharger wastegate position 1 sensor is out of self-test range high. |
| PCM P2ABD:00 | Turbocharger/Supercharger Wastegate Actuator "A" Driver Current/Temperature Too High: No Sub Type Information | Sets when the PCM detects the turbocharger wastegate motor 1 driver current is greater than a calibrated threshold. |
Possible Sources
- Intake air system concern
- Turbocharger bypass valve circuitry concern
- Wastegate control hose
- Wastegate vacuum sensor
- Turbocharger bypass valve (9K378)
- Turbocharger wastegate regulating solenoid (9961 pressure actuated, 9E882 vacuum actuated)
- Turbocharger wastegate motor (9G488)
- Wastegate vacuum sensor (9F479)
- PCM (12A650)