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Engine-Codes – Generic – P0111

P0111 Code - Intake Air Temperature Circuit Range/Performance Problem

Quick Answer

The P0111 diagnostic trouble code (DTC) indicates that there is a problem with the Intake Air Temperature (IAT) sensor circuit, specifically relating to the range or performance. Common causes include Faulty IAT sensor, Wiring or connector issues in the IAT sensor circuit, Air leaks near the IAT sensor. 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 indicates Intake Air Temperature Circuit Range/Performance Problem.
Common causes
Common causes include Faulty IAT sensor, Wiring or connector issues in the IAT sensor circuit, Air leaks near the IAT sensor.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0111 Description

The P0111 diagnostic trouble code (DTC) indicates that there is a problem with the Intake Air Temperature (IAT) sensor circuit, specifically relating to the range or performance. The IAT sensor is responsible for measuring the temperature of the incoming air into the engine. This information is crucial for the Engine Control Module (ECM) to adjust the air-fuel mixture ratio, ignition timing, and other engine parameters to ensure optimal performance and fuel efficiency.

OBDII Code P0111 - Intake Air Temperature Circuit Range/Performance Problem
P0111 Code - Intake Air Temperature Circuit Range/Performance Problem

Common Causes of P0111

  1. Faulty IAT sensor
  2. Wiring or connector issues in the IAT sensor circuit
  3. Air leaks near the IAT sensor
  4. Dirty or contaminated sensor
  5. ECM software or hardware issues

Symptoms of P0111

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine hesitation during acceleration
  4. Check Engine Light illuminated
  5. Inaccurate temperature readings on the dashboard

How to Fix P0111

  1. Diagnose the IAT sensor using a scan tool to determine if it is reading temperatures accurately.
  2. Inspect the wiring and connectors for any damage or corrosion and repair as necessary.
  3. Clean or replace the IAT sensor if it is dirty or faulty.
  4. Clear the DTC with a scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying ECM issues.

Cost to Fix P0111

The cost of repairing a P0111 code can vary depending on the specific cause of the issue. Typically, replacing a faulty IAT sensor can cost between $50 to $100 for the part, with additional labor costs ranging from $50 to $150. If wiring or connector repairs are needed, this could increase the total cost. It's important to consider diagnostic time and labor rates at auto repair shops, which can impact the final repair bill.

What does this mean?

Tech Notes for P0111

Before replacing the Mass Air Flow (MAF) sensor, try replacing the air filter and cleaning the Mass Air Flow sensor with Mass Air Flow sensor cleaner. Reset code and drive the vehicle. If the code comes back, it may be necessary to replace the Mass Air Flow sensor.

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Code P0111 Information for Specific Makes

  • P0111 Acura — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 Audi — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 BMW — Intake Air Temperature Circuit Range/Performance Bank 1
  • P0111 Buick — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Cadillac — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Chevrolet — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Chrysler — Intake Air Temperature Sensor 1 Performance
  • P0111 Dodge — Intake Air Temperature Sensor 1 Performance
  • P0111 Ford — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 GMC — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Honda — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 Hyundai — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 Jaguar — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Jeep — Intake Air Temperature Sensor 1 Performance
  • P0111 Lexus — Intake Air Temperature Sensor Gradient Too High
  • P0111 Lincoln — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 Mazda — Intake Air Temperature Circuit Performance Problem
  • P0111 Mercedes-Benz — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Mercury — Intake Air Temperature Sensor 1 Circuit Range/Performance Problem
  • P0111 MINI — Intake Air Temperature Circuit Range/Performance Bank 1
  • P0111 Mitsubishi — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Nissan — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Subaru — Intake Air Temperature Circuit Range/Performance Problem
  • P0111 Toyota — Intake Air Temperature Sensor Gradient Too High
  • P0111 Volkswagen — Intake Air Temperature Circuit Range/Performance Problem
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 Code

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

The common symptoms of OBDII code P0111 include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of the Intake Air Temperature Circuit Range/Performance Problem (P0111) code?

Possible causes of the P0111 code include a faulty intake air temperature sensor, damaged wiring or connectors in the sensor circuit, or a problem with the engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0111?

To diagnose the cause of P0111, start by checking the intake air temperature sensor for proper operation, inspecting the sensor's wiring and connectors for damage, and testing the ECM for any malfunctions using a diagnostic scanner.

4. Can a dirty air filter trigger OBDII code P0111?

Yes, a dirty air filter can affect the intake air temperature readings, potentially triggering the P0111 code. It is recommended to check and replace the air filter if necessary when troubleshooting this code.

5. Will driving with OBDII code P0111 cause further damage to my vehicle?

Continuing to drive with the P0111 code may lead to decreased engine performance and fuel efficiency. It is advised to address the issue promptly to prevent any potential long-term damage to the vehicle.

6. Is it safe to reset the OBDII code P0111 without fixing the underlying issue?

Resetting the P0111 code without fixing the underlying issue will only temporarily clear the error code. The issue causing the code will persist, and the code will likely reappear after driving cycles.

7. Can a DIY enthusiast repair OBDII code P0111 at home?

Depending on the cause of the P0111 code, DIY enthusiasts may be able to repair it at home by replacing the intake air temperature sensor, checking and repairing damaged wiring, or cleaning connectors. However, more complex issues may require professional assistance.

8. How much does it typically cost to repair OBDII code P0111 at a mechanic?

The cost to repair OBDII code P0111 at a mechanic can vary depending on the cause of the issue, the labor rates in your area, and the cost of any necessary parts. It is recommended to obtain quotes from different mechanics for an accurate estimate.

9. Are there any preventive measures to avoid triggering OBDII code P0111?

Regular maintenance, such as changing the air filter at recommended intervals, inspecting and cleaning the intake air temperature sensor, and ensuring proper wiring connections, can help prevent triggering the P0111 code.

10. How soon should I address OBDII code P0111 once it appears?

It is advisable to address OBDII code P0111 as soon as it appears to prevent potential engine performance issues and further damage. Ignoring the code can lead to more severe problems over time.

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