P0241 Code - Turbocharger/Supercharger Boost Sensor 'B' Circuit Low

What Does P0241 Mean?

P0241 is a generic OBD-II code triggered when the Engine Control Module (ECM) detects the intake boost pressure sensor B input circuit low below specifications, indicating a short to ground in the sensor or wiring.

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What are the common causes of P0241 ?

The most common causes of this code include a vacuum leak at the intake manifold, a dirty air cleaner, the wastegate is either stuck open or closed, a defective intercooler, loose bolts between the exhaust manifold and the turbocharger, a loose flange between the turbocharger and the intake pipe, a faulty boost sensor, shorted or open wiring in the boost sensor circuit, loose, corroded, or disconnected electrical connectors in the boost sensor 5-volt reference circuit, or turbo failure. Turbo failure is usually caused by internal oil leaks and oil supply restrictions. These leaks/obstructions contribute to an insufficient oil supply to the turbocharger main shaft; resulting in a cracked turbo housing, turbo bearing failure, bearing wobble (causing the impeller to contact the housing), and damaged or missing impeller blades.

How do you troubleshoot P0241 ?

The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. P0241 code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.

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