Ford Error Code P1112: How to Fix It

Medium 45-60 minutes Medium Severity Verified June 2026
Error Code
P1112
Brand
Ford
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
45-60 minutes
Ford error code P1112 indicates an intermittent fault with your intake air temperature (IAT) sensor. This sensor measures the temperature of incoming air to help your engine's computer optimize fuel mixture and timing. When it fails intermittently, you may experience rough idling, poor fuel economy, or reduced engine performance.
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Tools You'll Need

How to Fix Error Code P1112

  1. Turn off engine and ensure safety

    Never work on a hot engine. Engine components can cause severe burns.
  2. Connect OBD2 scanner and verify code

  3. Locate the intake air temperature sensor

  4. Inspect wiring and connector

  5. Clean the sensor and connections

    Do not use harsh chemicals or abrasives on the sensor tip as this can damage the sensitive element.
  6. Test sensor resistance

  7. Check for intermittent faults

  8. Replace sensor if faulty

  9. Clear codes and test drive

Parts You May Need

Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
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Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
Intake Air Temperature (IAT) sensor
Check Price on Amazon
Electrical contact cleaner
Check Price on Amazon
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When to Call a Professional

Contact a qualified mechanic if you're uncomfortable working under the hood, if multiple related codes appear simultaneously, if the problem persists after sensor replacement, or if you discover extensive wiring damage that requires professional repair. Also seek professional help if your vehicle is still under warranty.

Frequently Asked Questions

Can I drive my Ford with P1112 error code?
Yes, you can typically drive with P1112, but you may experience reduced fuel economy, rough idling, or poor performance. It's best to address the issue promptly to prevent potential engine damage and restore optimal performance.
How much does it cost to fix Ford P1112 error?
DIY repair costs range from $20-80 for a replacement IAT sensor. Professional repair typically costs $150-300 including labor. The sensor itself is relatively inexpensive, but labor costs vary by location and vehicle complexity.
What causes Ford P1112 intake air temperature sensor problems?
Common causes include sensor contamination from oil or dirt, corroded wiring connections, damaged wiring harness, sensor age-related failure, or loose electrical connections. Intermittent faults are often caused by poor electrical connections.
How often should I replace my Ford IAT sensor?
IAT sensors don't have a specific replacement interval and typically last 100,000+ miles. Replace only when they fail or show symptoms. Regular air filter changes help keep the sensor clean and extend its life.
Will P1112 cause my Ford to fail emissions testing?
Yes, active trouble codes like P1112 will typically cause your vehicle to fail emissions testing. The code must be cleared and the issue resolved for your vehicle to pass inspection in most states.