P0113 on a Mazda: Causes, Fixes & Repair Cost
🟢 Low severity · drivable
Safe to drive — the engine just gets a wrong intake air temperature reading, which may cause slightly rich running.
What P0113 means on a Mazda
On a Mazda, P0113 means the intake air temperature (IAT) sensor is reporting a high-voltage, open-circuit signal. On most Mazdas the IAT sensor is built into the mass air flow (MAF) sensor, so the code usually points to that assembly or its connector. The engine may run slightly rich until it is fixed.
Is P0113 common on Mazdas?
P0113 is common on Mazdas with higher mileage, where the MAF/IAT assembly gets dirty or fails and connectors loosen or corrode. Mazda3s, Mazda6s, and CX-5s see this after years of service. It is a sensor fault, not an engine failure.
Commonly reported on: Mazda3, Mazda6, CX-5, MX-5.
Symptoms
- Check engine light on
- Slightly rich running or worse fuel economy
- Possible hard starting
- Often no noticeable symptoms
Common causes
- most common: Faulty MAF/IAT sensor assembly
- common: Dirty or contaminated sensor element
- common: Loose or corroded connector
- less common: Damaged wiring to the sensor
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Clean the MAF/IAT sensor with sensor cleaner | Yes | $10–15 |
| Replace the MAF/IAT sensor assembly | Yes | $80–190 |
| Repair the connector or wiring | Mechanic | $50–150 |
Frequently asked questions
Other common Mazda codes
P0113 on other brands
Looking for the full (non-brand-specific) guide? See the P0113 code page →
Browse all Mazda codes: Mazda hub →
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.