DTC Code U2627 – What does this code mean?
<p><b>DTC Code U2627</b> indicates a loss of communication between the Reductant Control Module and the Reductant Level Sensor in vehicles with generic systems. This code is triggered when the expected periodic message from the transmitter device is not received, affecting the serial data communication network.</p>
Symptoms for Fault Code U2627
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<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 communication issue between the reductant control module and the reductant level sensor.</li>
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Common Causes for Fault Code U2627
<ul><li>The reductant level sensor may be faulty, leading to a loss of communication with the control module.</li><li>An open or shorted harness in the reductant level sensor can disrupt the signal transmission.</li><li>Poor electrical connections in the reductant level sensor circuit can cause intermittent communication issues.</li><li>The reductant control module itself might be faulty, preventing proper communication with the sensor.</li></ul>
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Troubleshooting for Fault Code U2627
<ul>
<li><b>Verify DTC Code</b>: Ensure the DTC U2627 is active and not a historical code. Clear the code and see if it returns after a test drive.</li>
<li><b>Inspect Wiring and Connectors</b>: Check the wiring and connectors between the Reductant Control Module and the Reductant Level Sensor for any signs of damage, corrosion, or disconnection.</li>
<li><b>Check Power and Ground</b>: Verify that the Reductant Level Sensor is receiving proper power and ground. Use a multimeter to check for voltage and continuity.</li>
<li><b>Test Reductant Level Sensor</b>: Test the Reductant Level Sensor for proper operation. Replace the sensor if it is found to be faulty.</li>
<li><b>Examine Reductant Control Module</b>: Inspect the Reductant Control Module for any signs of malfunction. Reprogram or replace the module if necessary.</li>
<li><b>Perform System Recalibration</b>: After repairs, recalibrate the system to ensure proper communication between the module and sensor.</li></ul>
Severity Description for Fault Code U2627
<p>The DTC code U2627 indicates a <b>critical</b> issue where the Reductant Control Module has lost communication with the Reductant Level Sensor. This can lead to <ul><li>inaccurate DEF (Diesel Exhaust Fluid) level readings</li><li>potential failure of the emission control system</li><li>increased emissions</li></ul>. Immediate attention is required to prevent <b>non-compliance with emission standards</b> and potential engine performance issues.</p>
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