P0241
Turbocharger Boost Sensor B Circuit Range/Performance
Powertrain Fuel and Air Metering Turbo Boost Control 🟡 Moderate — Fix within a week
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What This Actually Means
In plain language — no jargon

The turbocharger's boost pressure sensor (the second one, labeled 'B') is sending a signal outside its normal range to the engine computer. Think of it like a pressure gauge that's giving wildly incorrect readings, making the engine unable to properly control turbo boost.

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Symptoms You May Notice
3 known symptoms for this code
Check Engine Light (CEL) illuminated
Reduced engine power and turbo boost pressure
Rough idle or hesitation during acceleration
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Embedded Systems Insight
What the ECU/ECM is actually computing

The ECU monitors the voltage output from Boost Sensor B, comparing it against expected pressure values across different engine speeds and loads. If the voltage signal falls outside the calibrated range or fluctuates erratically, the ECU cannot accurately control boost pressure and triggers the fault code.

Voltage & Parameter Thresholds

Parameter Normal Range Fault Condition
Sensor Voltage 0.5–4.5 volts (typical 0.5V at idle, 4.5V at max boost) Below 0.2V or above 4.8V, or signal out of range for operating conditions
Boost Pressure 0–25 psi (varies by engine) Sensor reading doesn't correlate with expected pressure; stuck low or high
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Diagnostic & DIY Fix Guide
Check these in order — from cheapest to most complex
1
Turbocharger Boost Sensor B connector
Inspect and reseat the sensor connector; clean corroded pins with electrical contact cleaner.
2
Boost sensor wiring harness
Check wiring for cracks, pinches, or corrosion between sensor and ECU; repair or replace as needed.
3
Turbocharger Boost Sensor B
Replace the faulty sensor if connector and wiring are clean and secure.