<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: <b>Symptom:</b> The engine light illuminates on the dashboard. <b>Potential Causes:</b> This can be due to a malfunction in the secondary air injection system, specifically related to the air flow/pressure sensor circuit in Bank 1. Possible issues include a faulty air flow/pressure sensor, wiring problems, or a malfunctioning secondary air injection pump.</li> <li><b>Reduced Engine Performance</b>: <b>Symptom:</b> The vehicle may experience reduced engine performance. <b>Potential Causes:</b> This can occur if the secondary air injection system is not functioning correctly, leading to improper air-fuel mixture and affecting engine efficiency.</li> <li><b>Failed Emissions Test</b>: <b>Symptom:</b> The vehicle may fail an emissions test. <b>Potential Causes:</b> A malfunction in the secondary air injection system can lead to increased emissions, as the system is designed to reduce harmful pollutants.</li> </ul>

<ul><li>The AIR Pressure Sensor may be faulty, leading to incorrect readings and triggering the error code.</li><li>An open or shorted harness in the AIR Pressure Sensor can disrupt the signal, causing the system to malfunction.</li><li>Poor electrical connections in the AIR Pressure Sensor circuit can result in intermittent or failed communication with the control module.</li></ul>

<ul> <li><b>Research Technical Service Bulletins (TSBs)</b>: Research TSBs for the specific vehicle by year, model, and power plant to identify any known issues or updates related to the P2430 code.</li> <li><b>Perform Visual Inspection</b>: Inspect the wiring and connectors associated with the secondary air injection system for defects such as scraping, rubbing, bare wires, or burn spots. Check for corrosion and damaged pins.</li> <li><b>Check Connectors and Connections</b>: Ensure all connectors and connections to the secondary air injection pump, check valve, pressure sensor, air control valve, and PCM are secure and free of corrosion.</li> <li><b>Verify Circuit Configuration</b>: Consult the vehicle's technical data to verify the configuration of the circuit and confirm all components, including any fuses or fuse-able links, are present and functioning.</li> <li><b>Test One-Way Check Valve</b>: Test the check valve to ensure that airflow is in one direction only. Check for ice in the secondary air injection pump during cold weather, which may indicate a defective check valve.</li> <li><b>Inspect Secondary Air Injection Pump</b>: Check the secondary air injection pump for proper operation. Replace if found faulty.</li> <li><b>Test Air Pressure Sensor</b>: Test the air pressure sensor for proper operation. Replace if found defective.</li> <li><b>Inspect Air Control Solenoid Valve</b>: Check the air control solenoid valve for proper operation. Replace if found faulty.</li> <li><b>Check and Repair Wiring</b>: Repair or replace any defective wiring found during the visual inspection.</li> <li><b>Flash or Replace PCM</b>: If all other components are functioning correctly, consider flashing or replacing the PCM as a last resort.</li></ul>

<p>The DTC code P2430 indicates an issue with the Secondary Air Injection System Air Flow/Pressure Sensor Circuit on Bank 1. This is a critical issue as it affects the vehicle's emissions control system.</p><ul><li><b>Immediate Actions:</b> Inspect and repair the air injection system and sensor circuit.</li><li><b>Potential Risks:</b> Delayed repair can lead to increased emissions, potential engine damage, and failed emissions tests.</li></ul>