P2566 serious

Turbocharger Boost Control Position Sensor Circuit High

The P2566 code means the vehicle's onboard diagnostic system has detected: Turbocharger Boost Control Position Sensor Circuit High. This is a serious severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$250 - $700 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Engine enters limp mode
  • Possible overboost condition
  • Erratic turbo behavior
  • Reduced engine power warning

Probable Causes (Ranked by Likelihood)

  • Short to voltage in boost position sensor circuit Very High
  • Faulty turbocharger boost position sensor High
  • Damaged wiring harness near turbocharger Moderate
  • PCM internal circuit failure Low

Step-by-Step Diagnostic Procedure

  1. Read freeze frame data and confirm P2566 is stored

  2. Measure boost position sensor signal voltage at the PCM connector

  3. Inspect wiring harness near turbocharger for heat damage or shorts

  4. Disconnect sensor and check if voltage drops to confirm short

Frequently Asked Questions

What does P2566 mean?

P2566 means the turbocharger boost control position sensor circuit is reading above the maximum expected voltage, indicating a possible short to power or bad sensor.

Can I drive with a P2566 code?

Drive only short distances. A high signal could indicate an overboost condition, which can damage the engine. Have it inspected immediately.

How much does it cost to fix P2566?

Repair costs are typically $250 to $700, depending on whether the issue is wiring, sensor, or actuator related.

Sources

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

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