P1112 1999 Ford F150 Code - Intake Air Temperature Sensor Intermittent
Quick Answer
The P1112 diagnostic trouble code for a 1999 Ford F150 indicates an issue with the Intake Air Temperature (IAT) sensor that is intermittent. Common causes include Faulty IAT sensor, Loose or corroded electrical connections to the IAT sensor, Wiring harness issues. 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
- P1112 1999 Ford F150 indicates Intake Air Temperature Sensor Intermittent .
- Common causes
- Common causes include Faulty IAT sensor, Loose or corroded electrical connections to the IAT sensor, Wiring harness issues.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P1112 1999 Ford F150 Description
The P1112 diagnostic trouble code for a 1999 Ford F150 indicates an issue with the Intake Air Temperature (IAT) sensor that is intermittent. The IAT sensor is a crucial component of the vehicle's engine management system, as it measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion efficiency. An intermittent fault with the IAT sensor can lead to incorrect temperature readings being sent to the ECM, resulting in poor engine performance, reduced fuel efficiency, and potential drivability issues.
Common Causes of P1112 1999 Ford F150
- Faulty IAT sensor.
- Loose or corroded electrical connections to the IAT sensor.
- Wiring harness issues.
- Intake air leaks near the sensor.
- ECM software or hardware issues.
Symptoms of P1112 1999 Ford F150
- Check engine light illuminated on the dashboard.
- Decreased fuel efficiency.
- Rough idling or stalling.
- Engine hesitation or lack of power.
- Increased emissions output.
How to Fix P1112 1999 Ford F150
- Begin by locating the IAT sensor on the intake manifold or air intake duct.
- Inspect the sensor and its wiring for any visible damage, corrosion, or loose connections.
- Test the sensor using a multimeter to check for proper resistance values.
- If the sensor is faulty, replace it with a new one following manufacturer guidelines.
- Clear the trouble code from the ECM memory using a scan tool and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1112 1999 Ford F150
The cost of repairing an Intake Air Temperature Sensor Intermittent issue on a 1999 Ford F150 can vary depending on the specific cause of the problem and the cost of parts and labor in your area. On average, the cost of replacing an IAT sensor ranges from $50 to $150, while the labor cost for this repair can range from $80 to $150 per hour. Therefore, the total repair cost could range from $150 to $400 or more. It's recommended to consult with a trusted mechanic or auto repair shop to get an accurate estimate based on your vehicle's specific needs.
Tech Notes for P1112 1999 Ford F150
Need more information about the P1112 1999 Ford F150 code?
Need more information on how to fix the P1112 1999 Ford F150 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1112 1999 Ford F150 code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P1112 1999 Ford F150 Code
1. What does the OBDII code P1112 mean on a 1999 Ford F150?
P1112 indicates an intermittent issue with the Intake Air Temperature (IAT) sensor, which measures the temperature of the air entering the engine.
2. What are common symptoms of code P1112 in a 1999 Ford F150?
Common symptoms include rough idling, poor fuel economy, reduced engine performance, and an illuminated Check Engine Light.
3. What causes the P1112 code on a 1999 Ford F150?
This code is typically caused by a faulty IAT sensor, damaged or corroded wiring, poor electrical connections, or a malfunctioning Powertrain Control Module (PCM).
4. Can a dirty air filter cause the P1112 code?
While a dirty air filter won’t directly cause this code, it can contribute to poor airflow, which may affect the IAT sensor’s readings indirectly.
5. How do I diagnose the P1112 code on a 1999 Ford F150?
Start by visually inspecting the IAT sensor and its wiring for damage or corrosion. Use a multimeter to test the sensor’s resistance and check for proper voltage at the connector.
6. Can I drive my 1999 Ford F150 with the P1112 code?
While the truck may still be drivable, ignoring the code can lead to poor engine performance and increased fuel consumption. It’s best to address the issue promptly.
7. How do I fix the P1112 code on a 1999 Ford F150?
Repairs may include replacing the IAT sensor, repairing damaged wiring, cleaning electrical connections, or updating the PCM if necessary.
8. Where is the Intake Air Temperature sensor located on a 1999 Ford F150?
The IAT sensor is typically located in the air intake duct or integrated into the Mass Air Flow (MAF) sensor assembly.
9. How much does it cost to fix the P1112 code on a 1999 Ford F150?
The cost can vary, but replacing the IAT sensor typically ranges from $50 to $150, including parts and labor. Wiring repairs may increase this cost.
10. Can a P1112 code be cleared without fixing the problem?
Clearing the code with an OBDII scanner may temporarily turn off the Check Engine Light, but the issue will likely return unless the underlying problem is resolved.
Discuss the causes and fixes for P1112 1999 Ford F150 OBDII Code
Code P1112 1999 Ford F150 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.