Turbo/Super Charger Boost Sensor "B" Circuit Range/Performance
The P0240 code means the vehicle's onboard diagnostic system has detected: Turbo/Super Charger Boost Sensor "B" Circuit Range/Performance. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- moderate
- Estimated cost
- $80 - $400 (parts and labor)
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What Are the Symptoms of P0240?
- Check Engine Light on
- Reduced power or limited boost
- Possible hesitation under acceleration
What Causes P0240? (Most Likely First)
- Boost leak or loose intake hose near the sensor High
- Blocked, cracked or disconnected sensor port or hose High
- Sensor reading out of calibration Moderate
- Wiring or connector fault Low
Can I Still Drive with P0240?
Short distances only. P0240 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0240 mean?
P0240 means Turbo/Super Charger Boost Sensor "B" Circuit Range/Performance. Boost pressure sensor "B" is reporting, but its reading does not make sense against what the engine computer expects from other sensors or operating conditions.
Can I drive with this code?
Usually for short distances, but the engine computer may limit boost, so expect reduced power until it is repaired.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0240?
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Find which sensor is "B" on your engine in the service information. The letter is set by the manufacturer.
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Inspect the sensor connector and harness for damage, corrosion or oil contamination.
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With the engine off, compare the sensor reading with barometric pressure. Then check the intake tract and the sensor's hose or port for leaks.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
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