AutoCodes – Ford – P1115 1998 Ford F150

P1115 1998 Ford F150 Code - Intake Air Temperature Sensor 2 Circuit High

Quick Answer

The IAT sensor is a thermistor device in which resistance changes with temperature. Common causes include Faulty Intake Air Temperature Sensor 2, Intake Air Temperature Sensor 2 harness is open or shorted, Intake Air Temperature Sensor 2 circuit poor electrical connection. 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: P1115 1998 Ford F150 indicates Intake Air Temperature Sensor 2 Circuit High.
Common causes: Common causes include Faulty Intake Air Temperature Sensor 2, Intake Air Temperature Sensor 2 harness is open or shorted, Intake Air Temperature Sensor 2 circuit poor electrical connection.
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 1,945

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 Apr 21, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1115 1998 Ford F150 Description

The IAT sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a thermistor decreases as the temperature increases, and the resistance increases as the temperature decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signals to the Powertrain Control Module (PCM) corresponding to temperature.
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor in a series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The IAT sensor provides air temperature information to the PCM. The PCM uses the air temperature information as a correction factor in the calculation of fuel, spark, and air flow.
The IAT sensor provides a quicker temperature change response time than the ECT or CHT sensor.
Currently there are 2 types of IAT sensors used, a stand alone, non-integrated type and an integrated type. Both types function the same, however the integrated type is incorporated into the mass air flow (MAF) sensor instead of being a stand-alone sensor.

OBDII Code P1115 1998 Ford F150 - Intake Air Temperature Sensor 2 Circuit High - AutoCodes.com — P1115 1998 Ford F150 Code - Intake Air Temperature Sensor 2 Circuit High

What does this mean?

What are the Possible Causes of the DTC P1115 1998 Ford F150?

Faulty Intake Air Temperature Sensor 2
Intake Air Temperature Sensor 2 harness is open or shorted
Intake Air Temperature Sensor 2 circuit poor electrical connection
Damaged Powertrain Control Module (PCM)

How to Fix the DTC P1115 1998 Ford F150?

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 does this mean?

Code Tech Notes

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor. Monitor the IAT on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1115 1998 Ford F150 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.

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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 P1115 1998 Ford F150 Code

1. What are common symptoms associated with OBDII code P1115 on a 1998 Ford F150?

The common symptoms include rough idling, poor engine performance, reduced fuel efficiency, and potentially an illuminated check engine light.

2. What does the OBDII code P1115 for a 1998 Ford F150 indicate?

The code P1115 specifically points to an issue with the Intake Air Temperature Sensor 2 Circuit registering a high voltage condition.

3. What are the possible causes of OBDII code P1115 on a 1998 Ford F150?

Potential causes include a faulty Intake Air Temperature Sensor 2, damaged wiring or connectors in the sensor circuit, issues with the sensor's connection to the PCM, or a malfunctioning PCM.

4. How can I diagnose the Intake Air Temperature Sensor 2 Circuit High issue on my 1998 Ford F150?

Diagnosing this issue typically involves checking the sensor's resistance, inspecting the wiring and connectors for damage, testing the sensor's voltage, and verifying the sensor's data with a scan tool.

5. Can I continue driving my 1998 Ford F150 with the P1115 code?

It is not recommended to drive your vehicle with the P1115 code present, as it can lead to poor engine performance and potential long-term damage if left unresolved.

6. How do I repair the Intake Air Temperature Sensor 2 Circuit High issue on my 1998 Ford F150?

Repairing the issue may involve replacing the Intake Air Temperature Sensor 2, repairing or replacing damaged wiring or connectors, ensuring proper connection to the PCM, and clearing the trouble codes.

7. Is it possible to reset the OBDII code P1115 on a 1998 Ford F150 without fixing the underlying issue?

While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing.

8. Can a DIY enthusiast fix the Intake Air Temperature Sensor 2 Circuit High problem on a 1998 Ford F150?

Depending on your skill level and access to tools, DIY enthusiasts may be able to address this issue by following repair guides or consulting with a professional for guidance.

9. Is the Intake Air Temperature Sensor 2 Circuit High issue a common problem in 1998 Ford F150 vehicles?

While not extremely common, issues with the Intake Air Temperature Sensor 2 Circuit can occur in 1998 Ford F150 vehicles due to sensor failures, wiring issues, or PCM malfunctions.

10. How can I prevent the recurrence of the P1115 code on my 1998 Ford F150 after repairing it?

To prevent the code from reoccurring, ensure proper installation of a new sensor, address any wiring or connector issues, perform regular maintenance checks, and drive your vehicle responsibly.