DTC Code U2473 – What does this code mean?

<ul> <li><a href="/problems/engine-warning-light-on"><b>Engine Light ON</b></a>: The engine light or service engine soon warning light illuminates, indicating a potential issue with the vehicle's speed sensor or related systems.</li> <li><b>Unexpected Vehicle Speed</b>: The vehicle may experience erratic speed readings or unexpected changes in speed, which could be linked to a malfunctioning speed sensor or communication issues within the vehicle's network.</li> </ul>

<ul><li>The vehicle speed signal may be disrupted, leading to unexpected readings.</li><li>A faulty Audio Control Module (ACM) can cause incorrect speed data to be processed.</li><li>An open or shorted ACM harness can interrupt communication, affecting speed signal accuracy.</li><li>Poor electrical connections in the ACM circuit can lead to intermittent or incorrect speed signals.</li></ul>

<ul> <li><b>Verify DTC Code</b>: Ensure the DTC U2473 is active by using a diagnostic scanner. Clear the code and perform a test drive to see if it reappears.</li> <li><b>Inspect Vehicle Speed Sensor</b>: Check the vehicle speed sensor for any signs of damage or disconnection. Ensure the sensor is properly mounted and connected.</li> <li><b>Check Wiring and Connectors</b>: Inspect the wiring and connectors related to the vehicle speed sensor for any signs of corrosion, damage, or loose connections.</li> <li><b>Test Vehicle Speed Sensor Signal</b>: Use an oscilloscope to test the signal from the vehicle speed sensor. Verify that the signal is consistent with the vehicle's speed.</li> <li><b>Examine ABS Module</b>: Inspect the ABS module for any faults or issues that could affect the vehicle speed readings. Check for any additional DTCs related to the ABS system.</li> <li><b>Review Vehicle Speed Data</b>: Use a scan tool to review live data for vehicle speed. Compare the data with actual vehicle speed to identify discrepancies.</li> <li><b>Consult Technical Service Bulletins</b>: Check for any technical service bulletins (TSBs) related to DTC U2473 that may provide additional guidance or known issues.</li></ul>

<p>The DTC code U2473 indicates an <b>unexpected vehicle speed</b> issue, which is critical. This can lead to <ul><li>loss of vehicle control</li><li>increased risk of accidents</li></ul> if not addressed promptly. The vehicle's speed sensor or related systems may be malfunctioning, causing erratic speed readings. Immediate attention is necessary to ensure driver and passenger safety.</p>