Failed secondary air pump motor (seized or electrically open); Blown fuse or melted relay in the air pump circuit; Corroded, damaged, or disconnected wiring or connector at the pump or PCM; Failed air pump relay or control module; Restricted or disconnected air pump inlet/outlet hoses causing the pump to overheat and fail; PCM internal fault (rare, but possible after other causes are ruled out)

DTC codes / Mazda codes / P1415

P1415 · MazdaAir Pump Circuit

Q: What does code P1415 mean?

Air Pump Circuit. P1415 on Mazda vehicles indicates that the powertrain control module (PCM) has detected a fault in the air pump circuit, which is part of the secondary air injection system used to reduce cold-start emissions. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, often due to an open, short, or failed component.

P1415 on Mazda vehicles indicates that the powertrain control module (PCM) has detected a fault in the air pump circuit, which is part of the secondary air injection system used to reduce cold-start emissions. The PCM monitors the circuit for expected voltage or current and sets this code when the signal is out of range, often due to an open, short, or failed component.

SystemPowertrain

Code typeMazda specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or stumbling during the first few minutes after a cold start
A slight hissing or whining noise from the engine bay during cold-start operation
Failed emissions test due to incomplete readiness monitors
In rare cases, a noticeable decrease in fuel economy if the pump runs continuously

Common causes, most likely first

Failed secondary air pump motor (seized or electrically open)
Blown fuse or melted relay in the air pump circuit
Corroded, damaged, or disconnected wiring or connector at the pump or PCM
Failed air pump relay or control module
Restricted or disconnected air pump inlet/outlet hoses causing the pump to overheat and fail
PCM internal fault (rare, but possible after other causes are ruled out)

How to diagnose and fix it

Check the air pump fuse and relay first, replacing any blown fuse or faulty relay
Inspect the wiring harness and connector at the air pump for corrosion, chafing, or loose pins
Command the air pump on with a scan tool and listen for operation; if silent, test for power and ground at the pump connector
Measure resistance across the air pump motor; an open or shorted winding confirms pump failure
Verify that the air pump inlet and outlet hoses are intact and free of blockages or disconnections
If the pump and circuit test good, check for a faulty PCM driver by back-probing the control wire
Clear the code and perform a cold-start drive cycle to confirm the repair

What Mazda techs check before replacing the pump

A seized air pump often blows the fuse repeatedly, so always check for a mechanical bind in the pump before installing a new fuse.
Corrosion inside the pump connector is a common Mazda-specific issue, especially in regions with road salt, and can mimic a failed pump.
The PCM may set P1415 if the air pump runs too long due to a stuck relay, so test the relay for continuity when energized.
A restricted air pump filter or hose can cause the pump to overheat and draw excessive current, leading to circuit codes without a failed motor.
Do not overlook the ground connection for the air pump; a poor ground can cause intermittent P1415 without any other symptoms.

Can I keep driving with P1415?

You can generally continue driving with P1415, but avoid long periods of idling and cold-start short trips until repaired, as the secondary air system helps reduce emissions during warm-up. If the check engine light flashes or you notice rough running, have it diagnosed promptly.

Tools that help

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Guidance is general and written for Mazda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.