<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The illumination of the engine light indicates a detected issue with the turbocharger boost control position sensor 'A' circuit. This could be due to a low voltage signal being sent to the Engine Control Module (ECM).</li> <li><b>Reduced Engine Performance</b>: A malfunctioning turbocharger boost control position sensor can lead to reduced engine performance. This is because the ECM may not be able to accurately control the turbocharger boost pressure.</li> <li><b>Poor Acceleration</b>: Drivers may experience poor acceleration due to improper boost pressure regulation, which is essential for optimal engine performance.</li> <li><b>Increased Fuel Consumption</b>: An inaccurate boost control position sensor can cause the engine to run inefficiently, leading to increased fuel consumption.</li> </ul>

<ul><li>The Turbocharger Boost Control Position Sensor may be faulty, leading to incorrect readings.</li><li>An open or shorted harness in the Turbocharger Boost Control Position Sensor can disrupt the signal.</li><li>Poor electrical connections in the Turbocharger Boost Control Position Sensor circuit can cause intermittent or weak signals.</li></ul>

<ul> <li><b>Check Technical Service Bulletins (TSB)</b>: Verify if there are any TSBs related to the P2564 code for your vehicle. This can provide known fixes and save diagnostic time.</li> <li><b>Locate Turbocharger Boost Control Position Sensor (TBCPS)</b>: Find the TBCPS sensor, typically mounted on the turbocharger housing. Visually inspect the connector and wiring for damage, such as scraping, rubbing, bare wires, burn spots, or melted plastic.</li> <li><b>Inspect Connector Terminals</b>: Disconnect the TBCPS sensor connector and inspect the terminals for signs of burning or corrosion (green tint). Clean terminals with electrical contact cleaner and a plastic bristle brush, then apply electrical grease.</li> <li><b>Clear DTC Codes and Retest</b>: Use a scan tool to clear the DTC codes. If the P2564 code does not return, the issue was likely with the connections. If it returns, proceed to further testing.</li> <li><b>Test Power and Ground Circuits</b>: With the key off, disconnect the TBCPS sensor connector. Use a digital voltmeter to check for 12V or 5V at the power terminal and ground terminal. If voltage is incorrect, repair the wiring or replace the PCM.</li> <li><b>Test Signal Wire</b>: With the connector still disconnected, move the voltmeter red lead to the signal wire terminal. The voltmeter should read 5V. If not, repair the signal wire or replace the PCM.</li> <li><b>Replace TBCPS Sensor</b>: If all tests pass and the P2564 code persists, replace the TBCPS sensor. If the issue remains, consider PCM replacement, ensuring it is properly programmed for the vehicle.</li></ul>

<p>The DTC code P2564 indicates a low circuit issue in the Turbocharger Boost Control Position Sensor 'A'.</p><ul><li><b>Potential Risks:</b> Reduced engine performance, increased fuel consumption, and potential turbocharger damage.</li><li><b>Immediate Actions:</b> Inspect the sensor and wiring for damage or disconnection. Verify the sensor's voltage and replace if necessary.</li></ul>