AutoCodes – Generic – P0237

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

Quick Answer

The boost pressure sensor responds to pressure changes in the intake manifold. Common causes include Boost pressure sensor harness is open or shorted, Boost pressure sensor circuit poor electrical connection, Faulty boost pressure sensor. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0237 indicates Turbocharger/Supercharger Boost Sensor 'A' Circuit Low.
Common causes: Common causes include Boost pressure sensor harness is open or shorted, Boost pressure sensor circuit poor electrical connection, Faulty boost pressure sensor.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 87,002

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code 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 - AutoCodes.com — P0237 Code - Turbocharger/Supercharger Boost Sensor 'A' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0237?

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)

How to Fix the DTC P0237?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0237 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0237 code?

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Need Help with the Code?

Get the P0237 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0237 Acura — Turbocharger Boost Sensor Circuit Low Voltage
P0237 Chevrolet — Turbocharger Boost Sensor Circuit Low Voltage
P0237 Chrysler — MAP Sensor Voltage Too Low
P0237 Dodge — MAP Sensor Too High Too Long
P0237 GMC — Turbocharger Boost Sensor Circuit Low Voltage
P0237 Honda — Turbocharger Boost Sensor Circuit Low Voltage
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 RAM — MAP Sensor Too High Too Long
P0237 Volkswagen — Turbo/Super Charger Boost Sensor 'A' Circuit Low

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0237 Code

1. What are the common symptoms of OBDII code P0237?

- Common symptoms include a lack of power, reduced fuel efficiency, engine stalling, and the vehicle going into limp mode.

2. What can cause the Turbocharger/Supercharger Boost Sensor 'A' Circuit Low code P0237?

- Causes can include a faulty boost sensor, damaged wiring or connectors, a vacuum leak, or a problem with the turbo/supercharger itself.

3. How can I diagnose the Turbocharger/Supercharger Boost Sensor 'A' Circuit Low code P0237?

- Diagnosis typically involves checking the boost sensor, inspecting the wiring and connectors, and performing a boost pressure test.

4. Can driving with OBDII code P0237 cause further damage to my vehicle?

- Continuing to drive with this code can potentially cause damage to the engine or turbo/supercharger components due to incorrect air/fuel ratios.

5. What are some repair tips for addressing OBDII code P0237?

- Repair tips may include replacing the boost sensor, repairing/replacing damaged wiring, fixing vacuum leaks, and ensuring proper turbo/supercharger operation.

6. Is it safe to continue driving my vehicle with the Turbocharger/Supercharger Boost Sensor 'A' Circuit Low code P0237?

- It is not recommended to drive the vehicle with this code present, as it can lead to performance issues and potential engine damage.

7. How much does it typically cost to repair OBDII code P0237?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

8. Can I reset OBDII code P0237 with a simple scan tool?

- Yes, you can reset the code with an OBDII scan tool, but it is important to diagnose and address the underlying issue to prevent the code from returning.

9. Will OBDII code P0237 cause my check engine light to illuminate?

- Yes, this code will trigger the check engine light to illuminate on the dashboard to alert you of a potential issue with the turbocharger/supercharger boost sensor circuit.

10. How long does it take to repair OBDII code P0237?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair, but it may take anywhere from 1 to 4 hours at a repair shop.

Discuss the causes and fixes for P0237 OBDII Code

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Carsten Jørgensen
Date: June 28, 2017 at 7:33 am

I have code P0237 on my Ford Focus 1,6 TDCI from 2009. It refer to the MAP sensor but it was changed two month ago.

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Mr Terence Hills
Date: August 19, 2021 at 2:44 pm

This code is po237 on a bmw series 3 E46 320D touring, it revs over 3000 revs but its not giving any or little boost so its get up and go has got up and gone can anyone help me please , I can't afford garage labour charges so is there anything I can do myself to rectify this , I need it back to full boost , I hate it taking ages to get over 80/ 90 , o it's a 2004 320D .

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