Mazda Diagnostic Trouble Codes

OBD2 fault codes seen on Mazda vehicles, with what each code means, its typical repair cost range, and notes on specific Mazda models.

Emissions

P0110Low

Intake Air Temperature Sensor 1 Circuit

Mazda CX-30 • 2019-2024

On the SKYACTIV-G petrol engines Mazda logs P0110:00 as an internal malfunction of IAT sensor No.1, ...

P0420Moderate

Catalyst System Efficiency Below Threshold (Bank 1)

Mazda 3 • 2004-2024

On Mazda Skyactiv-G petrol engines (Mazda3, Mazda6, CX-5 with the 2.0 and 2.5), P0420 is most often ...

Fuel System

P0171Moderate

System Too Lean (Bank 1)

Mazda CX-5 • 2012-2024

On Mazda engines, P0171 shows up on both the older 2.0/2.3 MZR (Mazda3, Mazda6) and the Skyactiv-G. ...

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