<ul> <li><b>Engine Light ON (or Service Engine Soon Warning Light)</b>: The illumination of the engine light indicates an issue with the Secondary Air Injection System Control 'B' Circuit. This could be due to a high voltage condition in the circuit.</li> <li><b>Poor Engine Performance</b>: The vehicle may experience reduced engine performance or hesitation during acceleration. This can be linked to the malfunctioning secondary air injection system, which affects the air-fuel mixture.</li> <li><b>Failed Emissions Test</b>: A malfunction in the secondary air injection system can lead to increased emissions, causing the vehicle to fail an emissions test.</li> <li><b>Unusual Engine Noises</b>: You may hear unusual noises from the engine bay, which can be attributed to the malfunctioning air injection system components.</li> </ul>

<ul><li>The Secondary Air System Relay may be faulty, causing improper operation of the air injection system.</li><li>An open or shorted harness in the Secondary Air System Relay can disrupt the electrical flow, leading to this error code.</li><li>Poor electrical connections in the Secondary Air System Relay circuit can result in intermittent or failed communication.</li><li>A malfunctioning Secondary Air System Pump can fail to deliver the necessary air, triggering the error code.</li></ul>

<ul> <li><b>Retrieve Codes and Freeze Frame Data</b>: Connect the diagnostic scanner to the vehicle's diagnostic port. Retrieve all stored codes and pertinent freeze frame data. Write down this information for reference.</li> <li><b>Clear Codes and Test Drive</b>: Clear the codes and test drive the vehicle until the code is restored or the PCM enters readiness mode. If the code is intermittent, the condition may need to worsen for accurate diagnosis.</li> <li><b>Perform Visual Inspection</b>: Inspect related wiring and connectors for damage such as cuts, burns, or corrosion. Repair or replace any damaged wiring or connectors.</li> <li><b>Check Secondary Air Injection System Control Voltage</b>: Use a DVOM to test the secondary air injection system control voltage at the appropriate connector pin. If no voltage is detected, check system fuses and replace any blown or defective fuses.</li> <li><b>Test Circuit at PCM Connector</b>: If voltage is detected at the secondary air injection system control connector, test the corresponding circuit at the PCM connector. If no voltage is detected, suspect an open circuit between the sensor and the PCM.</li> <li><b>Inspect PCM</b>: If voltage is detected at the PCM connector, suspect a defective PCM or a PCM programming error. Consider reprogramming or replacing the PCM if necessary.</li> <li><b>Check for Technical Service Bulletins (TSBs)</b>: Search for any TSBs that match the stored code, vehicle year, make, model, and engine. A relevant TSB may provide a quick solution to the diagnosis.</li></ul>

<p>The DTC code P2260 indicates a high voltage issue in the Secondary Air Injection System Control 'B' Circuit. This is a critical issue as it can lead to increased emissions and potential engine performance problems.</p><ul><li><b>Immediate Actions:</b> Inspect the air injection pump, relay, and associated wiring for faults.</li><li>Check for any blown fuses or damaged connectors.</li><li>Addressing this issue promptly is crucial to avoid further engine damage and to ensure compliance with emission standards.</li></ul>