DTC P0238-00; Boost Pressure Sensor Circuit High Input: Notes
DETECTION CONDITION AND POSSIBLE CAUSE
| DTC P0238:00 |
Boost pressure sensor circuit high input |
| DETECTION CONDITION |
- The PCM monitors the input voltage from the boost pressure sensor. If the input voltage at the PCM terminal 2AS is above 4.89 V for 5 s, the PCM determines that the boost pressure sensor circuit has a malfunction.
Diagnostic support note
- This is a continuous monitor (CCM).
- The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle.
- FREEZE FRAME DATA/Snapshot data is available.
- DTC is stored in the PCM memory.
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| FAIL-SAFE FUNCTION |
- Stop the supercharging pressure control. (fully open the wastegate valve)
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| POSSIBLE CAUSE |
- Boost pressure sensor/boost air temperature sensor connector or terminals malfunction
- PCM connector or terminals malfunction
- Boost pressure sensor malfunction
- Short to power supply in wiring harness between boost pressure sensor/boost air temperature sensor terminal D and PCM terminal 2AS
- Open circuit in wiring harness between the following terminals:
- Boost pressure sensor/boost air temperature sensor terminal C-PCM terminal 2AE
- Boost pressure sensor/boost air temperature sensor terminal D-PCM terminal 2AS
- Boost pressure sensor/boost air temperature sensor terminal A-PCM terminal 2J
- PCM malfunction
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CAUTION:
- Verify the malfunction symptom according to not only the PID value but also the symptom troubleshooting.
Related PIDs
| Item (definition) |
Unit/Condition |
Definition |
Condition/Specification (Reference) |
| INLET_PRES |
KPa {MPA}, mBar {BAR}, psi, in H20 |
Air intake pipe pressure input from boost pressure sensor |
- Displays air intake pipe pressure
|
| V |
Boost pressure sensor voltage |
- Ignition switched ON (engine off) (boost pressure:101 kPa {1.03 kgf/cm2
, 14.6 psi}): Approx. 4.12 V
- Idle (after warm up) (boost pressure: 33 kPa {0.34 kgf/cm2
, 4.8 psi}): Approx. 1.9 V
- Racing (engine speed is 2, 000 rpm) (MAP: 26 kPa {0.27 kgf/cm2
, 3.8 psi}): Approx. 1.23 V
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