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 negative pressure/no boost (throttle valve closed) and high signal voltage at positive pressure/boost (throttle valve wide open). If a signal voltage from the turbocharger boost sensor is a set value, the powertrain control module (PCM) detects a malfunction and stores a DTC.

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 setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the PCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.