P2579 Fault Code

Turbocharger Speed Sensor Circuit Range/Performance

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

The P2579 fault code indicates an issue with the turbocharger speed sensor circuit specifically related to the range or performance of the sensor. This fault occurs when the engine control module (ECM) detects that the turbocharger speed sensor is providing readings outside what is considered normal operational limits. The turbocharger is a critical component that helps increase engine power by forcing more air into the combustion chamber, and accurate speed readings are essential for maintaining optimal performance.

What are the symptoms of the P2579 code?

Common symptoms associated with the P2579 code may include:

• Reduced engine performance and power
• Increased turbo lag or hesitation during acceleration
• Activation of the check engine light
• Unusual noise from the turbocharger
• Poor fuel economy or increased emissions.

What causes the P2579 code?

Several potential causes can lead to the P2579 fault code, including:

• A malfunctioning turbocharger speed sensor
• Damaged or corroded wiring and connectors in the sensor circuit
• Faulty ECM programming or failure
• A physically damaged turbocharger or issues with its operation
• Software glitches or sensor calibration issues that impact performance.

How to fix P2579?

To resolve the P2579 fault code, the following steps should be taken:

• Inspect the turbocharger speed sensor and its wiring for any visible damage, corrosion, or loose connections.
• Replace the turbocharger speed sensor if it is found to be faulty.
• Repair any wiring issues or replace damaged connectors in the circuit.
• Clear the fault code and conduct a test drive to ensure the issue is resolved and the check engine light does not reappear.
• If the problem persists, further diagnostics may be needed to examine the ECM or turbocharger's performance.