Possible Causes
| Possible Causes |
|---|
| (F343) FUSED ASD/MAIN RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE |
| (K644) SECONDARY AIR PUMP CONTROL CIRCUIT SHORTED TO GROUND |
| (K644) SECONDARY AIR PUMP CONTROL CIRCUIT OPEN OR HIGH RESISTANCE |
| SECONDARY AIR FLOW PUMP RELAY |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .