P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0240 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0240 code

P0240 is a diagnostic trouble code (DTC) for "Turbocharger Boost Sensor B Circuit Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0240 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0240 code definition

Turbocharger Boost Sensor B Circuit Range/Performance

What the P0240 code means

P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost pressure sensor B input circuit range or performance to be out of specifications when compared to the manifold pressure sensor (MAP) or the barometric pressure sensor (BARO) at idle and with the key on, engine off, before the engine is started.

What causes the P0240 code?

  • The turbo boost pressure sensor B does not correlate the same voltage input to the ECM with the MAP or BARO sensors at engine idle or when the key is on and the engine is off.

  • The turbo boost pressure sensor B is contaminated or clogged with debris or carbon deposits.

  • The turbo boost pressure sensor B is slow to respond to changing pressure from deterioration with age.

What are the symptoms of the P0240 code?

  • The Check Engine Light will be illuminated and code P0240 is set in ECM memory.

  • The engine turbo boost may be turned off by the ECM and the engine will lack power.

  • The engine may lack some power during acceleration if the boost sensor is failing to register the correct amount of boost pressure.

How does a mechanic diagnose the P0240 code?

  • Scans codes and document the freeze frame data in order to verify the problem.

  • Clears the codes to verify whether the concern comes back.

  • Checks the operation of the boost pressure sensor compared to the MAP sensor.

  • Checks the turbo boost sensor for blockage of the sensor port, or boost sensor hose or line.

  • Checks the turbo boost sensor connector for loose or corroded pins in the connector.

  • Checks the sensor pressure lines for kinks or damaged lines.

Common mistakes when diagnosing the P0240 code?

Follow these simple guidelines to prevent misdiagnosis:

  • Check the boost pressure sensor hose for obstructions or kinks.

  • Verify the electrical connections to the sensor are clean and secure, and the pressure hose is not leaking, kinked or cracked.

How serious is the P0240 code?

  • If the turbo boost pressure sensor is out of range or having performance problems, then the ECM will disable the turbo boost on some vehicles. This could cause the vehicle to have a lack of power on acceleration, and engine performance problems.

What repairs can fix the P0240 code?

  • Replacing the boost sensor if it is not giving the correct input pressure reading to the ECM

  • Repairing or replacing the hoses and connections to the turbo boost sensor due to kinks or blockage of the lines

Additional comments for consideration regarding the P0240 code

Code P0240 is triggered by the intake boost sensor indicating a range or performance problem that the ECM determines is out of known specifications. The most common failure is the boost sensors slow response due to lower performance issues with the sensor as it ages.

Need help with a P0240 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0240
Check Engine Light
trouble codes

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0240 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,901

Rating Summary
3,566
166
43
25
101
3,566
166
43
25
101

Jerel

8 years of experience
125 reviews
Jerel
8 years of experience
Jarel was ontime and took the time to go over the work to be done.
2004 MINI COOPER - CHECK ENGINE LIGHT IS ON - CARY, NORTH CAROLINA

Jeffrey

24 years of experience
683 reviews
Jeffrey
24 years of experience
Jeffrey was early to the appointment time. Upon opening the hood of the car to inspect my engine, he was right away able to diagnose some of the problems I was having. He definitely seemed to know his stuff. Very friendly and helpful. Even fixed a few of my small vacuum leaks right away since he had some spare tubing around. Awesome experience!
1992 OLDSMOBILE CUTLASS SUPREME - CHECK ENGINE LIGHT IS ON - ROCK HILL, SOUTH CAROLINA

Ricardo

8 years of experience
223 reviews
Ricardo
8 years of experience
Nice dude, helped me diagnose my car issue. Very professional and knowledgable. Would def hire again!
2005 TOYOTA COROLLA - CHECK ENGINE LIGHT IS ON - LONG BEACH, CALIFORNIA

Alexis

27 years of experience
74 reviews
Alexis
27 years of experience
STAYED WITH THE CAR TILL HE FIGURED IT OUT, THE COMPUTER DIDNT HELP HIM HIS KNOWLEDGE FIX THE CAR, VERY RESPECTFUL, RICARDO IS EXACTLY THE SAME BOTH SHOULD WORK TOGETHER ALL THE TIME THANK ITS ALMOST DONE, JUST A THERMOSTAT AND THAT I HOPE DOES IT. AND THE GUYS ON THE PHONE WERE ALSO VERY POLITE AND FOLLOWED UP ON ME TILL I WAS HAPPY WITH JOB.
2007 CHEVROLET TRAILBLAZER - CHECK ENGINE LIGHT IS ON - MIAMI, FLORIDA

More related articles

Veteran and Military Driver Laws and Benefits in New Mexico
The state of New Mexico offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...

Related questions

Q: I put a cold air intake on my car I have replace the O2 sensor that is failing area code p0151 I'm not sure what to do mass is new

Hello. If the P0151 code persists after replacing the oxygen sensor, then it may be possible that the issue is with the wiring. If there is any damage or wear to the oxygen sensor connector or wiring there may be...

Q: Car cranking problem being a bad fuse box?

Fuse boxes can and do go bad every once in a while. While it is rather rare, it is not unheard of. If there has been any sort of damage in the area, these are more likely to fail. The...

Q: My oil pressure low light comes oil and I replaced the sensor several times but it still comes on

Hello, thank you for writing in. Particularly having the check engine light on, the vehicle will have set off diagnostic troubleshooting codes that pertain to whatever component has set off the warning lights. You will want to start by having...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com