1. DTC P0237 description
The boost pressure sensor is installed to the air duct. The boost pressure sensor changes the signal voltage in accordance with changes in air pressure in the air intake pipe. The sensor has the following circuits.
- 5 V reference circuit
- Low reference circuit
- Boost pressure sensor signal circuit
The boost pressure sensor transmits signals related to air pressure changes within the air intake pipe to the ECM via the signal circuit. The ECM detects a low signal voltage in low boost pressure, such as when the engine is under low load. The ECM detects a high signal voltage in high boost pressure, such as when the engine is under high load. If the ECM detects an excessively low signal voltage, the DTC is set.
2. Condition for setting DTC P0237
Condition for running the DTC
- The battery voltage is 9 to 16 V.
- The ignition switch is ON.
- DTCs P060B and P0651 are not set.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P060B Internal Control Module A/D Processing Performance".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC P0651 Sensor Reference Voltage 2 Circuit".
Condition for setting the DTC
- The ECM detects that the boost pressure sensor signal voltage is 0.1 V or less for 3 seconds.
3. Action taken when DTC P0237 sets
- Euro4: The ECM illuminates the MIL. Refer to Action taken when DTC sets - Type A (Euro4).
- Except Euro4: The ECM illuminates the check engine warning light. Refer to Action taken when DTC sets - Type A (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".
- The ECM limits the fuel injection quantity.
- The ECM inhibits the EGR control.
- The ECM inhibits the turbocharger control.
- The ECM inhibits the cruise control.
- The ECM assumes a default boost pressure value.
4. Condition for clearing DTC P0237
- Euro4: Refer to Condition for clearing the MIL/DTC - Type A or Type B (Euro4).
- Except Euro4: Refer to Condition for clearing the check engine warning light/DTC - Type A or Type B (Except Euro4).
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) DTC type definitions".