AutoCodes – Mazda – P0111 Mazda

P0111 Mazda Code - Intake Air Temperature Circuit Performance Problem

Quick Answer

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P0111 Mazda indicates Intake Air Temperature Circuit Performance Problem.
Common causes: Common causes include Faulty Intake Air Temperature (IAT) sensor, Dirty air filter, Intake Air Temperature (IAT) sensor harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 14,804

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0111 Mazda Description

The Intake Air Temperature (IAT) sensor is built into mass air flow sensor or in some vehicles mounted to the air filter duct housing. The sensor detects intake air temperature and transmits a signal to the Engine Control Module (ECM). The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. Electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle.

OBDII Code P0111 Mazda - Intake Air Temperature Circuit Performance Problem - AutoCodes.com — P0111 Mazda Code - Intake Air Temperature Circuit Performance Problem

What does this mean?

What are the Possible Causes of the DTC P0111 Mazda?

Faulty Intake Air Temperature (IAT) sensor
Dirty air filter
Intake Air Temperature (IAT) sensor harness is open or shorted
Intake Air Temperature (IAT) sensor circuit poor electrical connection

How to Fix the DTC P0111 Mazda?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0111 Mazda code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0111 Mazda code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0111 Mazda Code

1. What are the common symptoms of OBDII code P0111 in a Mazda?

The common symptoms of OBDII code P0111 in a Mazda may include rough idling, poor fuel economy, hesitation during acceleration, or even stalling.

2. What causes the Intake Air Temperature Circuit Performance Problem in a Mazda?

The P0111 code in a Mazda is often triggered by a faulty intake air temperature (IAT) sensor, a damaged wiring harness, or a poor electrical connection to the sensor.

3. How can I diagnose the Intake Air Temperature Circuit Performance Problem in my Mazda?

To diagnose the P0111 code in a Mazda, you can use an OBDII scanner to read the code and check the IAT sensor's resistance using a multimeter to see if it falls within the manufacturer's specifications.

4. Can a dirty air filter trigger the P0111 code in a Mazda?

Yes, a dirty air filter can indirectly cause the P0111 code in a Mazda by affecting the intake air temperature readings. It is recommended to check and replace the air filter if necessary.

5. Is it safe to continue driving my Mazda with the P0111 code present?

Continuing to drive your Mazda with the P0111 code may lead to reduced engine performance and fuel efficiency. It is advisable to address the issue promptly to prevent further damage.

6. How can I reset the OBDII code P0111 in my Mazda?

You can reset the P0111 code in your Mazda using an OBDII scanner by clearing the trouble codes after addressing the underlying issue that triggered the code.

7. Can a disconnected IAT sensor cause the P0111 code in a Mazda?

Yes, a disconnected or faulty IAT sensor can trigger the P0111 code in a Mazda. It is crucial to check the sensor's connection and condition when diagnosing the issue.

8. Are there any DIY repair tips for fixing the P0111 code in a Mazda?

DIY repair tips for the P0111 code in a Mazda include checking and cleaning the IAT sensor, inspecting the wiring for damage, and ensuring proper connections before considering sensor replacement.

9. Will a P0111 code affect my Mazda's emissions performance?

Yes, the P0111 code can impact your Mazda's emissions performance by affecting fuel delivery and combustion efficiency. It is essential to address the issue to maintain optimal emissions levels.

10. How much does it typically cost to repair the P0111 code in a Mazda?

The cost to repair the P0111 code in a Mazda can vary depending on the cause of the issue. DIY solutions like cleaning the IAT sensor may be inexpensive, while sensor replacement or wiring repairs could range from $50 to $200 or more.