Advanced Diagnostics

Advanced Diagnostics

DTC P0238: Turbocharger Boost Sensor Circuit High Voltage











General Description
The turbocharger boost sensor senses charge air cooler (intercooler) pressure and converts it into electrical signals. The turbocharger boost sensor outputs low signal voltage at high-vacuum/no boost (throttle valve closed) and high signal voltage at low-vacuum/boost (throttle valve wide open).
If a signal voltage from the turbocharger boost sensor is a set value or more, the powertrain control module (PCM) detects a malfunction and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
The turbocharger boost sensor output voltage value is 4.49 V or more for least 2 seconds.

Diagnosis Details

Conditions for illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.
The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.