P0237 The boost pressure sensor has a short circuit

Fault code P0237 The boost pressure sensor has a short circuit is related to the problem with boost pressure sensor. The boost pressure sensor is use to monitor the pressure of air changes into intake manifold. The pressure inside the intake manifold is created by turbocharger and change by accelerator pedal position sensor and with engine speed. Engine control module use this information from boost pressure sensor and combine it with the store information in this system which are collected from other sensors to inject fuel into combustion chamber.

boost pressure sensor

Engine control module provide 5V feed voltage, ground and signal voltage to the sensor. In return boost pressure sensor send signal in form of voltage to engine control module about pressure changes in intake manifold. Engine control module have information about how much voltage should come from boost pressure sensor. When engine control module receiver undesired voltage from boost pressure sensor due to any reason, it set fault code store in control module

Causes of P0237 The boost pressure sensor has a short circuit:

Leak at the system or air intake into combustion engine.

Carbon deposition on the boost pressure sensor.

Damage wiring harness of the sensor.

Loose connection at the connector of boost pressure sensor.

Failure of any other sensor which is related to the boosting of engine.

Faulty boost pressire sensor.

Symptoms of P0237 The boost pressure sensor has a short circuit:

Check engine light will illuminate on cluster meter.

Fault code will store in the engine control module.

Low boost at high engine revolution.

Low mileage.

No power while driving at high speed.

How to trouble shoot:

When found fault P0237 The boost pressure sensor has a short circuit code store in engine control module. With the help of scan tool read data stream of boost pressure sensor reading. There should be some reading showing in data stream. When accelerator pedal press, there should be some changes take place in the reading of data stream of boost pressure sensor. If it does change according to acceleration than it might be consider that sensor is not faulty. There would be some other problem, but if it does not change as accelerator pedal press than there is a possibility of faulty pressure sensor.

Also check leak at intake of turbocharger, as boost pressure sensor is us to monitor amount of pressure of turbocharger intake. If there will be any leak at intake of turbocharger than also this fault code will store in engine control module. Because if there will be any leakage at intake turbocharger, air will suck from that leak area due to which pressure of intake of turbocharger will become as per the requirements. But that air pressure will not be measure by turbocharger boost pressure sensor.

First thing to do is remove boost pressure sensor out and check condition of the sensor. Check carbon deposition on the surface of boost pressure sensor. When there is carbon store on sensor than clean boost pressure sensor with the help of cleaner liquid, cleaning sensor gently. Then check sensor reading with the help of scan tool, if it show some reading than it is a good sign of that sensor is working. But if it does not than there might be some other problem. Most of the time there is a problem of faulty boost pressure sensor is. As this sensor is located at the intake of turbocharger. Than it is possible that dust could store at the sensor.

Disconnect the socket of boost pressure sensor and check voltage on the sensor. Engine control module give power supply, reference voltage and ground to senor. Check all of them on the connector with the help of multimeter, there would be 5V power supply, signal wire and ground. If anything is missing from all this than check the reason behind this. Like if any fuse is blown, damage wiring harness of the sensor, or failure of engine control module.

If boost pressure sensor have proper voltage supply, ground and boost pressure sensor is also in working condition. Then there is a high chance of leak air into combustion engine due to which this fault code is store in control module. Check very carefully for the leakage at intake of turbocharger, if any leak is found than repair that leak. But if there is no leak at intake of turbocharger than check turbocharger as the pressure inside intake of turbocharger is build turbocharger. That’s why if turbocharger will not be able to build enough air pressure in than also there will be no air pressure in the intake manifold. Due to which this fault code could be store in control module also.

Common mistake while diagnosing P0237:

As there are many sensor at engine compartment which is use to maintain high power or efficiency of engine. Most of them are similar to each other like exhaust back pressure sensor and turbo boost pressure sensor. Just because of these similar name of the sensor people get confuse that which sensor is exactly faulty. Identifying exact sensor which is faulty is more important so that you can work on that sensor. Some people in get confuse between these sensor and replace and than they replace or work on the wrong sensor.

How risky it is to drive with P0237 The boost pressure sensor has a short circuit:

Driving with fault code may not be a good thing as these sensor is use to monitor turbo boost. send this signal to engine control module, with the help of which engine control module manage boosting of engine. When this sensor stop working or sending wrong signal to the engine control module. Than engine control module will not be able to manage boosting of engine power. Due to which low boosting power at engine while driving can be feel.

What repair can fix P0237:

Repair leak in the air intake system.

Clean carbon deposition of the sensor.

Repair damage wiring harness of the sensor.

Fix loose connection at the connector of the sensor.

Replace any other faulty sensor in the system.

Replace faulty boost pressure sensor.

Related fault code’s:

P0472 exhaust back pressure sensor 1 has short circuit to ground.

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