What Does P0241 Mean?
The turbocharger boost pressure sensor B circuit is showing range or performance issues — the ECM detects that the sensor's signal is outside expected parameters during normal operation. This is closely related to P0240 and may indicate the sensor is reading within electrical limits but not accurately tracking actual boost pressure. The driver may notice inconsistent power delivery or limp mode.
Common Causes
35%
Degraded or failing boost pressure sensor B
25%
Restricted or leaking pressure reference line to sensor B
20%
Intake system boost leak affecting sensor B reading location
15%
Wiring issue causing intermittent signal from sensor B
5%
Turbocharger mechanical issue causing unexpected boost levels
Diagnostic Steps
1
Review freeze frame data and note boost pressure, engine load, RPM, and intake air temperature when the code set. This helps determine if the fault occurs at specific operating conditions.
2
Monitor boost sensor B live data at idle and during a controlled acceleration — the sensor should smoothly transition from atmospheric pressure to the target boost level. Erratic jumps or flat spots indicate sensor failure.
3
Check the sensor's pressure reference line for integrity. Remove it, inspect for contamination, and confirm it is not collapsed or kinked.
4
Backprobe the sensor signal wire at the ECM connector and compare the voltage to the sensor connector reading — significant difference indicates wiring resistance or damage.
5
If the sensor and wiring check out, perform a mechanical boost check with a standalone boost gauge tapped into the intake manifold to verify the turbo is actually making correct boost pressure.
Estimated Repair Cost
$80 - $350
Parts + labor, varies by vehicle and location
The turbocharger boost pressure sensor B circuit is showing range or performance issues — the ECM detects that the sensor's signal is outside expected parameters during normal operation. This is closely related to P0240 and may indicate the sensor is reading within electrical limits but not accurate...
The most common cause of P0241 (Turbocharger Boost Sensor B Circuit Range/Performance) is: Degraded or failing boost pressure sensor B
Typical repair costs for P0241 range from $80 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Reduced power mode is likely. The vehicle can be driven conservatively at low speeds and light load. Avoid heavy throttle, highway merging at full acceleration, and towing. Sustained inaccurate boost control increases the risk of engine damage from detonation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0241 to identify the root cause.
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Quick Info
Category
Powertrain
System
Turbocharger / Supercharger System
Difficulty
Type
Generic (SAE)
Recommended Tools
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