DTC Code U1228 – What does this code mean?
<p>The DTC code U1228 indicates that there is invalid or missing data for tires, which is detected by modules connected to the class 2 serial data circuit. This occurs when a module fails to receive a critical operating parameter within 5 seconds, necessitating the use of a default value.</p>
Symptoms for Fault Code U1228
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<li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: <b>Engine Light ON</b> indicates a problem with the vehicle's tire data communication. This can be caused by <ul><li>faulty tire pressure monitoring system (TPMS) sensors</li><li>issues with the vehicle's data bus</li><li>malfunctioning control module</li><li>damaged wiring or connectors</li></ul></li>
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Common Causes for Fault Code U1228
<ul><li>Faulty module that is not communicating can lead to invalid or missing data for tires.</li><li>An open or shorted module harness can disrupt the data transmission.</li><li>Poor electrical connection in the module circuit can cause intermittent or complete loss of data.</li></ul>
Troubleshooting for Fault Code U1228
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<li><b>Initial Scan</b>: Perform a comprehensive scan of the vehicle's onboard diagnostic system to confirm the presence of DTC U1228 and check for any other related codes.</li>
<li><b>Inspect Tire Pressure Monitoring System (TPMS) Sensors</b>: Visually inspect all TPMS sensors for any signs of damage or wear. Ensure that all sensors are properly installed and functioning.</li>
<li><b>Check TPMS Sensor Batteries</b>: Verify the battery life of each TPMS sensor. Replace any sensors with low or dead batteries.</li>
<li><b>Examine TPMS Antenna and Wiring</b>: Inspect the TPMS antenna and associated wiring for any signs of damage, corrosion, or disconnection. Repair or replace as necessary.</li>
<li><b>Verify TPMS Module Operation</b>: Check the TPMS module for proper operation. Ensure it is receiving and processing data from all sensors correctly.</li>
<li><b>Reprogram or Reset TPMS</b>: If all hardware components are functioning correctly, attempt to reprogram or reset the TPMS system using the appropriate diagnostic tool.</li>
<li><b>Test Drive and Monitor</b>: Conduct a test drive to monitor the TPMS system and ensure that the DTC U1228 does not reappear. Confirm that all tire data is being accurately reported.</li></ul>
Severity Description for Fault Code U1228
<p>The DTC code U1228 indicates <b>Invalid or Missing Data for Tires</b>. This can affect the vehicle's ability to monitor tire pressure accurately, potentially leading to unsafe driving conditions.</p><ul><li>Immediate action: Inspect and repair the tire pressure monitoring system (TPMS).</li><li>Potential risks: Delayed repair can result in undetected tire issues, increasing the risk of tire failure and accidents.</li></ul>
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