P0241 moderate

Turbo/Supercharger Boost Sensor B Circuit Low (Bank 2)

The P0241 code means the vehicle's onboard diagnostic system has detected: Turbo/Supercharger Boost Sensor B Circuit Low (Bank 2). This is a moderate severity code.

My Garage →
Keep driving?
Short distances only
DIY difficulty
moderate
Estimated cost
$80 - $400 (parts and labor)
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Common Symptoms

  • Check Engine Light illuminated
  • Bank 2 turbo boost disabled
  • Significant power loss
  • Engine may run rough under load

Probable Causes (Ranked by Likelihood)

  • Short to ground in Bank 2 boost sensor wiring Very High
  • Failed Bank 2 boost sensor (shorted) High
  • Corroded connector on Bank 2 Moderate
  • PCM input fault Low

Step-by-Step Diagnostic Procedure

  1. Read Bank 2 boost sensor voltage. Below 0.3V at key-on engine-off confirms low circuit.

  2. Disconnect sensor and check for short to ground on signal wire.

  3. Inspect connector for moisture or corrosion.

  4. With sensor disconnected, verify 5V reference is present at the connector.

Frequently Asked Questions

What happens when Bank 2 boost is disabled?

The engine will run on Bank 1 turbo only (or at reduced power), resulting in a noticeable loss of acceleration and top-end power.

Is P0241 specific to twin-turbo engines?

Yes, P0241 is specific to the Bank 2 boost sensor circuit on engines with separate turbochargers for each bank.

Can water splash cause P0241?

Yes, road water entering the sensor connector can short the signal to ground. Ensure connector seals are intact.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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