P0418: Secondary Air Injection (AIR) Pump Relay Control Circuit Bank 1

Possible Causes

• Faulty sensor or actuator related to the system
• Wiring or connector issues in the circuit
• Low fluid levels or contamination
• Mechanical issues in the affected system
• Faulty control module

Diagnosis and Repair

• Confirm the code with an OBD-II scanner and check related codes
• Inspect wiring and connectors for damage or loose connections
• Check fluid levels and condition; replace if necessary
• Test the sensor or actuator with a multimeter or scan tool
• Replace faulty components as needed
• Clear codes and test drive to verify repair

Related Error Codes

See also: P0400, P0401, P0402, P0403, P0404

Keywords: 1, fuse and relay guide, pump, relay diagram, (air), automotive wiring, air, fuse replacement guide, secondary, circuit, vehicle fuse box, relay, p0418:, car electrical system, injection, ECU error codes, fuse box diagram, fuse panel layout, control, car fuse types, bank, electrical troubleshooting

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