Mazda fault codes
18 distinct codes across 18 real diagnostics on Mazda, including the Mazda-specific ones no generic code list can decode.
Mazda-specific codes
These are manufacturer-specific, which means the same code on another marque is a different fault. That is exactly why they have no page of their own here and no entry in any generic code list: a single description for one of these would be wrong more often than right. Below they are scoped to Mazda, ranked by how often we have actually seen them, which is a claim we can stand behind.
| Code | Diagnostics on Mazda |
|---|---|
| P1412 | 1 |
To turn one of these into a cause you need the marque, the model and the engine, which is what the tool does. A code on its own is a starting point, not an answer.
Standard codes we see most on Mazda
These are standardised, so they mean the same thing on every vehicle and each one has a page of its own. The counts are what we see on Mazda specifically.
| Code | What it is | On Mazda |
|---|---|---|
| P0171 | System too lean, bank 1 | 5 |
| P0101 | Mass or volume air flow circuit range/performance | 2 |
| P0113 | Intake air temperature sensor 1 circuit high | 2 |
| P0300 | Random or multiple cylinder misfire detected | 2 |
| P061D | Not individually documented | 2 |
| P0661 | Intake manifold tuning valve control circuit low, bank 1 | 2 |
| C0031 | Left front wheel speed sensor circuit | 1 |
| P0100 | Mass or volume air flow circuit | 1 |
| P0139 | O2 sensor circuit slow response, bank 1 sensor 2 | 1 |
| P0234 | Turbocharger overboost condition | 1 |
| P0472 | Exhaust pressure sensor A circuit low | 1 |
| P06DE | Not individually documented | 1 |
| P2459 | Diesel particulate filter regeneration frequency | 1 |
| P253F | Not individually documented | 1 |
| U0100 | Lost communication with ECM/PCM A | 1 |
What tends to go wrong on Mazda
By share of the codes we have seen on this marque. A description of our own caseload, not a reliability ranking.
- Fuel trim: lean or rich · 5
- Air intake and MAF/MAP · 5
- Not yet classified · 3
- ECU internal and software · 2
- Misfire · 2
- Bus communication · 2
FAQ
Frequently asked questions
How do I run a diagnosis?
Select the vehicle on Start, click the Diagnostic card and choose New diagnostic. Fill in the description, the error codes and the mileage, then click Analyze.
Learn more: Diagnostic (vehicle-first start), Diagnostic form: description, error codes and mileage
Do I have to type the codes from my scan tool?
No. Click the camera button next to Error codes and take or choose a photo (JPEG or PNG) of the scan tool's screen; WrenchLane reads the codes and their descriptions into the form. You can also speak them with the microphone.
Learn more: OBD reader photo scan (fault codes from a photo), Voice input for the problem description
Are the public fault code pages built from my diagnostics?
They are built from anonymised, aggregated diagnostics run in WrenchLane; no workshop, customer or vehicle can be identified. Each fault code page shows how often the code was seen across those diagnostics and in how many separate workshops.
Learn more: Fault code pages on wrenchlane.com (fault-code cluster)
Decode a Mazda code against the actual car
Enter the code, the model and the symptoms and get ranked probable causes for that specific vehicle, with the checks in the order worth doing them. Free account, no card.
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