P2590 Fault Code

Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic

• What does that mean?
• Symptoms
• Causes
• Solutions

The Turbocharger Boost Control Position Sensor B Circuit Intermittent/Erratic fault code indicates that there are issues with the circuit that regulates the turbocharger boost pressure. The sensor provides feedback to the engine control unit (ECU) about the position of the turbocharger's wastegate, which is crucial for maintaining the desired boost pressure. If the signal from this sensor becomes intermittent or erratic, it can lead to poor engine performance and increased emissions. This code is commonly seen on vehicles equipped with turbocharged engines.

What are the symptoms of the P2590 code?

• Reduced engine power and acceleration.
• Check Engine Light illuminated.
• Unstable boost pressure readings.
• Turbo lag or fluctuating performance.
• Possible increased fuel consumption and emissions.

What causes the P2590 code?

• Damaged wiring or connectors in the boost control position sensor circuit.
• Faulty Turbocharger Boost Control Position Sensor.
• Issues with the engine control module (ECM).
• Vacuum leaks affecting the turbocharger system.
• Corrosion or poor contact at sensor terminals.

How to fix P2590?

• Inspect the wiring and connectors for damage or corrosion and repair as necessary.
• Test the Turbocharger Boost Control Position Sensor with a multimeter; replace it if it is faulty.
• Check for vacuum leaks in the turbo system and fix any identified issues.
• Ensure the ECM is functioning correctly and has no software issues.
• Clear the fault codes and perform a test drive to ensure the issue is resolved.