<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The engine control unit (ECU) detects an abnormally high exhaust gas temperature in Bank 1, triggering the warning light. Potential causes include a malfunctioning exhaust gas temperature sensor, a clogged or damaged catalytic converter, or issues with the exhaust system.</li> <li><b>Reduced Engine Performance</b>: High exhaust gas temperatures can lead to the ECU limiting engine performance to prevent damage. This may result in reduced power and acceleration. Potential causes include a faulty exhaust gas temperature sensor or restricted exhaust flow.</li> <li><b>Increased Fuel Consumption</b>: The engine may run less efficiently due to high exhaust gas temperatures, leading to increased fuel consumption. This can be caused by a malfunctioning sensor or issues within the exhaust system.</li> <li><b>Unusual Exhaust Noises</b>: A damaged or clogged catalytic converter can cause unusual noises from the exhaust system. This is often linked to high exhaust gas temperatures and may indicate a need for inspection and repair.</li> </ul>

<ul><li>The Exhaust Gas Temperature (EGT) sensor may be faulty, leading to incorrect temperature readings.</li><li>An open or shorted EGT harness can disrupt the signal, causing the error code.</li><li>Poor electrical connections in the EGT circuit can result in intermittent or incorrect data transmission.</li><li>Extreme changes in ambient temperature soon after the engine starts can cause temporary discrepancies in EGT readings.</li></ul>

<ul> <li><b>Initial Scan</b>: Use an OBD-II scanner to confirm the presence of DTC P2428 and check for any additional codes that may be related.</li> <li><b>Visual Inspection</b>: Inspect the exhaust system for any visible damage, leaks, or blockages that could cause high temperatures.</li> <li><b>Check Exhaust Gas Temperature (EGT) Sensor</b>: Test the EGT sensor on Bank 1 for proper operation using a multimeter. Compare the readings to the manufacturer's specifications.</li> <li><b>Inspect Wiring and Connectors</b>: Examine the wiring and connectors associated with the EGT sensor for any signs of damage, corrosion, or disconnection.</li> <li><b>Test EGR System</b>: Check the Exhaust Gas Recirculation (EGR) system for proper function. A malfunctioning EGR system can cause elevated exhaust temperatures.</li> <li><b>Check for Exhaust Restrictions</b>: Inspect the catalytic converter and muffler for any restrictions or blockages that could cause high exhaust temperatures.</li> <li><b>Verify Fuel System</b>: Ensure the fuel system is operating correctly. A lean fuel mixture can result in higher exhaust temperatures.</li> <li><b>Perform a Road Test</b>: Conduct a road test to monitor the exhaust gas temperature and ensure the issue has been resolved.</li></ul>

<p>The DTC code P2428 indicates that the exhaust gas temperature is too high on Bank 1. This is a critical issue.</p><ul><li><b>Potential Risks:</b> Prolonged high temperatures can damage the catalytic converter, exhaust manifold, and other components.</li><li><b>Immediate Actions:</b> Inspect the exhaust system for blockages, check the EGT sensor, and ensure proper engine cooling. Addressing this promptly can prevent severe engine damage.</li></ul>