AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - P0240

P0240 Code - Turbocharger/Supercharger Boost Sensor 'B' Circuit Range/Performance

- Code Popularity: 24,744 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P0240?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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)
⚠ Does your Car have Safety Recalls? → Check here

How to Fix the DTC P0240?

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

Search for P0240 Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0240 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

This diagnostic trouble code (DTC) P0240 will set if the boost pressure sensor signal is above the predicted range.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P0240 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 P0240 - Turbocharger/Supercharger Boost Sensor 'B' Circuit Range/Performance - AutoCodes.com
P0240 Code - Turbocharger/Supercharger Boost Sensor 'B' Circuit Range/Performance

Need More Information on the Code?

Need more information on how to fix the P0240 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P0240 Audi Turbo/Super Charger Boost Sensor 'B' Circuit
  • P0240 Ford Turbocharger/Supercharger Boost Sensor 'B' Circuit Range/Performance
  • P0240 Mercedes-Benz Turbocharger/Supercharger Boost Sensor 'B' Circuit Range/Performance
  • P0240 Volkswagen Turbo/Super Charger Boost Sensor 'B' Circuit

Need Help with the Code?

Get the P0240 code diagnosed by a professional: Find a repair shop in your area

Code P0240 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0240 code? Have you replaced any parts?
Any information is appreciated. Thanks