For Shop Owners

P0237 - Turbocharger/Supercharger Boost Sensor 'A' Circuit Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Boost pressure sensor harness is open or shorted
  • Boost pressure sensor circuit poor electrical connection
  • Faulty boost pressure sensor
  • Faulty Turbo/Super Charger
  • Engine over temperature
  • Ignition misfire exceeds the calibrated threshold
  • Faulty Knock sensor (KS)
What does this mean?

When is the code detected?

This diagnostic trouble code (DTC) P0237 will set if the boost pressure sensor signal is below the predicted range.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0237 Description

The boost pressure sensor responds to pressure changes in the intake manifold. This pressure is created by the turbocharger and changes with accelerator pedal position (APP) and engine speed. The engine control module (ECM) uses this information to assist in diagnosis of the barometric pressure (BARO) sensor and to provide engine overboost protection. The boost pressure sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit. The engine control module (ECM) supplies 5 volts to the boost pressure sensor on the 5-volt reference 2 circuit, and provides a ground on a low reference circuit. The boost pressure sensor provides a signal to the ECM on a signal circuit relative to the pressure changes. The ECM monitors the boost pressure sensor signal for voltage outside of the normal range. The ECM calculates a predicted value for the boost pressure sensor. The ECM then compares the predicted value to the actual signal.
OBDII Code P0237 - Turbocharger/Supercharger Boost Sensor 'A' Circuit Low -

P0237 Information for specific makes

P0237 CHRYSLER MAP Sensor Too High Too Long
P0237 DODGE MAP Sensor Too High Too Long
P0237 ISUZU Turbocharger Boost Sensor Circuit Low Voltage
P0237 JEEP MAP Sensor Too High Too Long
P0237 MERCEDES-BENZ Turbocharger/Supercharger Boost Sensor 'A' Circuit Low
P0237 NISSAN Turbocharger Boost Sensor Circuit Low
P0237 VOLKSWAGEN Turbo/Super Charger Boost Sensor 'A' Circuit Low

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P0237 Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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