P0237
Fix within a few daysThe engine computer detects a voltage signal from the turbocharger/supercharger boost pressure sensor that is too low.
Code P0237 means your boost pressure sensor circuit has a low voltage. Common causes: Faulty boost sensor (70%), wiring issues (25%). Drivability: Yes, but with reduced power. Repair cost: $50-$200 DIY, $150-$500 professional.
Can I Drive With P0237?
Yes, for short trips only
Essential trips under 10 miles, avoid highways and heavy acceleration. Expect reduced power.
Stop driving immediately if: Flashing CEL, loud engine noises, burning smell, significant power loss making the vehicle unsafe to drive.
Symptoms of P0237
- 1Check Engine Light is on
- 2Reduced engine power or 'limp mode'
- 3Poor acceleration
- 4Engine hesitation under load
- 5Decreased fuel economy
Common Causes of P0237
Parts most likely causing this code, ranked by probability
The boost pressure sensor itself has failed internally and is sending an incorrect low voltage signal to the engine computer.
70% of P0237 cases are fixed by replacing this part
Damaged wires (short to ground or open circuit) or corroded/loose pins in the sensor's electrical connector prevent a correct signal from reaching the engine computer.
25% of P0237 cases are fixed by repairing wiring or connectors
A rare internal fault within the engine computer's boost sensor input circuit causes it to incorrectly read a low voltage.
5% of P0237 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the boost pressure sensor's electrical connector for corrosion, bent pins, or loose connections.
- Examine the wiring harness leading to the sensor for any signs of damage, chafing, or cuts.
How to Diagnose P0237
- 1Visually inspect the boost pressure sensor and its electrical connector for damage, corrosion, or loose connections.
- 2Check the wiring harness leading to the sensor for any signs of chafing, cuts, or shorts to ground.
- 3Using a multimeter, test the voltage at the sensor connector for proper reference voltage (typically 5V), ground, and signal voltage.
- 4If wiring and voltage checks are good, replace the boost pressure sensor.
- 5If the issue persists after sensor replacement, further diagnose the wiring back to the ECM/PCM, or consider ECM/PCM testing.
P0237 on Popular Vehicles
Ford F-150
2011-2024Common on EcoBoost engines. The MAP sensor (which functions as the boost sensor) can fail, leading to P0237. Also check for wiring damage near the intake manifold.
75% fixed by replacing the MAP sensor
Chevrolet Silverado
2014-2024Applies to turbocharged gasoline and Duramax diesel engines. Boost pressure sensor failures are common. Inspect the sensor and its wiring, especially for chafing where the harness passes near engine components.
70% fixed by replacing the boost pressure sensor
Subaru WRX/STI
2002-2024MAP sensor issues are not uncommon, particularly on older models or those with aftermarket modifications. Ensure the sensor is clean and its electrical connection is secure. Wiring damage from engine bay heat is also a possibility.
65% fixed by replacing the MAP sensor
Frequently Asked Questions
What does P0237 mean?
P0237 indicates that your vehicle's engine computer is receiving a voltage signal from the turbocharger or supercharger boost pressure sensor that is too low. This suggests an electrical problem with the sensor or its circuit.
Can I drive with P0237?
Yes, you can drive, but expect reduced engine power and acceleration. Your vehicle will likely be in 'limp mode' to protect the engine. Avoid heavy loads or high speeds, and fix this within a few days to restore full performance and prevent potential long-term issues.
Will P0237 clear itself?
No, P0237 will not clear itself. The engine computer stores this code until the underlying electrical fault with the boost pressure sensor circuit is repaired. You will need to fix the problem and then clear the code with a scan tool.
How do I fix P0237 myself?
Start by inspecting the boost pressure sensor's wiring and connector for damage. If they look good, test the sensor's voltage with a multimeter. If the sensor is not providing the correct signal, replacing the boost pressure sensor is the next step. This is a common DIY repair.
How much does it cost to fix P0237?
A DIY fix for P0237 typically costs $50-$200 for a new boost pressure sensor. If you take it to a professional shop, expect to pay $150-$500, which includes the part and 1-2 hours of labor.
P0237 keeps coming back - why?
If P0237 keeps returning, the initial repair did not address the root cause. This often means the problem is not the sensor itself, but rather a persistent wiring issue (a short or open circuit) or, in rare cases, a faulty engine computer. Thoroughly re-inspect the entire wiring harness.
Will P0237 fail emissions/smog test?
Yes, P0237 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure in most jurisdictions, and a fault in the boost system directly impacts engine performance and emissions.
What's the difference between P0237 and P0238?
P0237 indicates a 'low input' from the boost pressure sensor circuit, meaning the voltage signal is too low. P0238 indicates a 'high input' from the same circuit, meaning the voltage signal is too high. Both point to an electrical issue with the sensor or its wiring, but in opposite directions.
P0237 on Ford F-150?
P0237 on a Ford F-150 EcoBoost engine often points to a faulty MAP (Manifold Absolute Pressure) sensor, which also acts as the boost pressure sensor. Carbon buildup can sometimes affect these sensors, but a direct sensor failure is common. Inspect the sensor and its connector located on the intake manifold.
Questions to Ask Your Mechanic
Did you test the voltage at the boost pressure sensor connector, including the 5V reference, ground, and signal wires?
Good answer: Yes, I confirmed the 5V reference and ground are good, but the signal wire was reading consistently low, indicating a bad sensor or a short in the signal wire itself.
What did you find when inspecting the wiring harness for the boost pressure sensor?
Good answer: I found no visible damage or corrosion on the connector or the harness. I also performed a continuity test on the signal wire back to the ECM and it checked out fine.
Repair Cost Estimate
DIY Repair
Parts only
$50-$200
Shop Repair
Parts + labor
$150-$500
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate - requires basic hand tools and a multimeter for diagnosis. Access to the sensor can sometimes be challenging.
Cost of Waiting
Ignoring P0237 leads to continued reduced engine power and poor fuel economy. The engine computer might compensate incorrectly, potentially causing long-term engine stress or damage if the boost system is not accurately monitored. A $50-$200 sensor replacement now prevents more complex issues later.
While You're In There...
If the boost pressure sensor is located near the MAF sensor or intake, cleaning the MAF sensor can help ensure accurate air readings and prevent future related codes.
A clogged air filter can restrict airflow, potentially impacting boost pressure readings. Replacing it ensures optimal engine performance and air intake.
Tools You'll Need
- OBD-II Scan Tool
- Multimeter
- Basic Hand Tools (sockets, wrenches)
- Wire Strippers/Crimpers (if wiring repair is needed)
P0237 is a common code on turbocharged or supercharged vehicles. Most repairs involve replacing an affordable sensor, and your engine will regain its full power afterward.
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Your Next Steps
Step 1: Perform a thorough visual inspection of the boost pressure sensor, its connector, and the wiring harness for any obvious damage or loose connections.
Step 2: If the visual inspection doesn't reveal the problem, use a multimeter to test the voltage at the sensor connector. Check for 5V reference, a good ground, and the signal voltage. Compare readings to service manual specifications.
Step 3: If wiring and voltage checks are good, but the signal is consistently low, replace the boost pressure sensor. You'll likely need a new boost pressure sensor for your specific vehicle.