How to fix PO237 fault code?
The P0237 fault code is a diagnostic trouble code (DTC) that indicates an issue with the Turbocharger/Supercharger Boost Sensor "A" Circuit Low. This code is commonly found in vehicles equipped with turbocharged or supercharged engines. If left unresolved, it can lead to reduced engine performance and fuel efficiency. In this article, we’ll walk you through the causes, symptoms, and steps to fix the P0237 fault code.
What Does the P0237 Fault Code Mean?
The P0237 code is triggered when the Engine Control Module (ECM) detects a voltage signal from the boost pressure sensor that is lower than the expected range. This sensor monitors the pressure in the intake manifold to ensure the turbocharger or supercharger is functioning correctly. A low voltage signal typically indicates a problem with the sensor, wiring, or related components.
Common Symptoms of P0237
If your vehicle has triggered the P0237 fault code, you may notice the following symptoms:
- Check Engine Light illuminated on the dashboard.
- Reduced engine power or performance.
- Poor acceleration, especially at higher speeds.
- Decreased fuel efficiency.
- Unusual noises from the turbocharger or supercharger.
Causes of the P0237 Fault Code
Several factors can cause the P0237 fault code to appear. These include:
- A faulty turbocharger/supercharger boost sensor.
- Damaged or corroded wiring or connectors in the boost sensor circuit.
- Vacuum leaks in the intake system.
- Issues with the turbocharger or supercharger itself, such as a malfunctioning wastegate.
- Faulty Engine Control Module (rare).
Steps to Fix the P0237 Fault Code
Follow these steps to diagnose and fix the P0237 fault code:
- Step 1: Scan for Codes - Use an OBD-II scanner to confirm the P0237 code and check for any additional related codes.
- Step 2: Inspect the Boost Sensor - Locate the turbocharger/supercharger boost sensor and inspect it for visible damage, dirt, or debris. Clean or replace the sensor if necessary.
- Step 3: Check Wiring and Connectors - Examine the wiring and connectors leading to the boost sensor for signs of corrosion, fraying, or disconnection. Repair or replace damaged components.
- Step 4: Test the Sensor - Use a multimeter to test the voltage output of the boost sensor. Compare the readings to the manufacturer’s specifications. Replace the sensor if it is out of range.
- Step 5: Inspect the Turbocharger/Supercharger - Check for mechanical issues with the turbocharger or supercharger, such as a stuck wastegate or damaged components. Repair or replace as needed.
- Step 6: Clear the Code - After completing repairs, use the OBD-II scanner to clear the fault code. Test drive the vehicle to ensure the issue is resolved.
When to Seek Professional Help
If you’ve followed the steps above and the P0237 fault code persists, it may be time to consult a professional mechanic. At Kevin’s Autos, we specialize in diagnosing and repairing complex engine issues, including turbocharger and supercharger systems. Our experienced technicians can quickly identify the root cause of the problem and get your vehicle back on the road.
Contact us today to schedule an appointment or to learn more about our comprehensive auto repair services!
Frequently Asked Questions
Can you drive with a bad turbo sensor?
The short answer is you can but not for long as the damage could get worse.
How much does it cost to fix a turbo boost sensor?
The average cost for a Turbocharger Boost Sensor Replacement is between $214 and $246. Labor costs are estimated between $70 and $88 while parts are priced between $145 and $158. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
What are the symptoms of the code P0237?
What Are the Symptoms of a P0237 Code? Symptoms include an illuminated Check Engine Light, unresponsive turbo boost during acceleration, and an underpowered engine. You might also hear noises coming from the turbocharger, like hissing, whistling, or “wheezing” during higher speeds.
Can I drive with a P0236 code?
As mentioned, driving with the P0236 code can lead to overboost, which can then lead to damage within your catalytic converter. Assume that this is a very serious problem and get an expert to help so you can avoid all potential damage to your engine.
How much does it cost to replace a turbocharger boost control position sensor?
The average cost for a Turbocharger Boost Sensor Replacement is between $214 and $246. Labor costs are estimated between $70 and $88 while parts are priced between $145 and $158. This range does not include taxes and fees, and does not factor in your unique location. Related repairs may also be needed.
How do I fix error code P0236?
One of the easiest and most effective ways to fix DTC P0236 is to repair or replace faulty parts. Typically, these parts will be the brake booster pressure sensor, the turbocharger or supercharger, or the vacuum lines.
How to fix P0238 turbocharger boost sensor a circuit high?
Fix the P0238 Code With a New Boost Pressure Sensor
A faulty boost pressure sensor can also be to blame. If these problems aren't properly addressed, your vehicle can develop engine performance issues. Getting a new boost pressure sensor should restore your vehicle.
How do I know if my boost pressure sensor is bad?
If the Turbo Boost Pressure Sensor is failing, your vehicle may display the following symptoms:
- Lack of power.
- Poor acceleration or hesitation.
- Rough idle.
- Increased emissions or failed emissions.
- Check engine is illuminated.
What happens when turbo boost sensor fails?
Common Symptoms of Failure
If the Turbo Boost Pressure Sensor is failing, your vehicle may display the following symptoms: Lack of power. Poor acceleration or hesitation. Rough idle.
How do you fix the code P0237?
Repair Solutions
- Replace shorted boost sensor.
- Repair damaged wiring harness or connectors and secure away from heat sources.
- Clean or replace corroded connector pins.
- Replace faulty PCM if internally shorted (uncommon)
