P0418 — Secondary Air Injection System Relay 'A' Circuit Malfunction

Q: What does fault code P0418 mean?

P0418 means: Secondary Air Injection System Relay 'A' Circuit Malfunction. It is a Powertrain (engine/transmission) fault code defined by the OBD-II standard.

Q: Can I keep driving with P0418?

With P0418 you can usually drive home and book an inspection within a few days unless the car feels abnormal.

Powertrain (engine/transmission)

Secondary Air Injection System Relay 'A' Circuit Malfunction

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Can I drive with P0418?

You can usually drive home and book an inspection within a few days.

Frequently asked questions

What does fault code P0418 mean?

P0418 means Secondary Air Injection System Relay 'A' Circuit Malfunction.

Can I keep driving with P0418?

You can usually drive home and book an inspection within a few days.

Related fault codes

P0410 — Secondary Air Injection System Malfunction
P0411 — Secondary Air Injection System Incorrect Flow Detected
P0412 — Secondary Air Injection System Switching Valve 'A' Circuit Malfunction
P0413 — Secondary Air Injection System Switching Valve 'A' Circuit Open
P0414 — Secondary Air Injection System Switching Valve 'A' Circuit Shorted
P0415 — Secondary Air Injection System Switching Valve 'B' Circuit Malfunction
P0416 — Secondary Air Injection System Switching Valve 'B' Circuit Open
P0417 — Secondary Air Injection System Switching Valve 'B' Circuit Shorted
P0419 — Secondary Air Injection System Relay 'B' Circuit Malfunction

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