P0240: Turbocharger/Supercharger Boost Sensor B Circuit Range/Performance
What Does P0240 Mean?
P0240 is a diagnostic trouble code indicating: Turbocharger/Supercharger Boost Sensor B Circuit Range/Performance. This code relates to the fuel injection system. It has been reported in NHTSA complaints across 4 different vehicle models.
Symptoms of P0240
- ⚠️ Knocking or pinging noise
Common Causes
- 🔍 Failed or deteriorated catalytic converter
- 🔍 Faulty oxygen sensor
- 🔍 Sensor or control module malfunction
P0240 Reports by Year
Real Owner Reports
From NHTSA complaint database — actual owner descriptions.
"The contact owns a 2017 Hyundai Tucson. The contact stated that while his girlfriend was driving approximately 50 MPH, the engine started knocking, and the vehicle stalled. The contact stated that several unknown warning lights were illuminated. The contact stated that the engine was consuming one q"
— Hyundai Tucson owner, 08/14/2024
"I have had to replace the exhaust manifold and catalytic converter twice since owning my car. I have owned my car since 2020 and bought it at 23,000 miles. The car now has 100,000 miles - all highway. The code P0240 has displayed again and the dealership said I need to replace the catalytic converte"
— Hyundai Tucson owner, 09/26/2024
"TL* THE CONTACT OWNS A 2012 KIA SOUL. WHILE DRIVING APPROXIMATELY 40 MPH, THE CHECK ENGINE WARNING INDICATOR ILLUMINATED AND THE VEHICLE STARTED TO SPUTTER. THE VEHICLE DID NOT STALL AND WAS TAKEN TO AN INDEPENDENT MECHANIC. THE MECHANIC DIAGNOSED THAT THE CATALYTIC CONVERTER FAILED AND FAULT CODE: "
— Kia Soul owner, 04/05/2019
Source: NHTSA Complaints Database
Most Reported Vehicles for P0240
Based on NHTSA owner complaint data.
| # | Vehicle | Reports |
|---|---|---|
| 1 | KIA SOUL | |
| 2 | HYUNDAI TUCSON | |
| 3 | CHEVROLET CRUZE | |
| 4 | DODGE JOURNEY |
P0240 Reports by Vehicle
Detailed NHTSA complaint analysis for each vehicle model.
Frequently Asked Questions
Can I drive with this code?
Will this code clear itself?
How do I find the exact cause?
What To Do Next
Possible Fixes
- 🔧 Have the code scanned with a professional-grade scanner to read freeze frame data
- 🔧 Test the relevant sensor(s) with a multimeter before replacing
- 🔧 If DIY repair isn't feasible, get a diagnostic from a trusted mechanic ($50-150)
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.