P1115 2008 Ford Fusion 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 2008 Ford Fusion 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.
Code P1115 2008 Ford Fusion Description
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.
What are the Possible Causes of the DTC P1115 2008 Ford Fusion?
- 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 2008 Ford Fusion?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1115 2008 Ford Fusion 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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Frequently Asked Questions about P1115 2008 Ford Fusion Code
1. What does the OBDII code P1115 mean for a 2008 Ford Fusion?
P1115 indicates a problem with the Intake Air Temperature (IAT) Sensor 2 circuit, specifically that the sensor is reporting a voltage higher than expected.
2. What are the common symptoms of P1115 in a 2008 Ford Fusion?
Symptoms include poor engine performance, reduced fuel efficiency, difficulty starting, and possible illumination of the Check Engine Light.
3. What causes the P1115 code to appear in a 2008 Ford Fusion?
Common causes include a faulty IAT sensor, damaged or corroded wiring, a loose or poor electrical connection, or a malfunctioning Powertrain Control Module (PCM).
4. How do I diagnose the P1115 code on my Ford Fusion?
Start by inspecting the IAT sensor and its wiring for damage, corrosion, or loose connections. Use a multimeter to test sensor resistance and verify the circuit voltage.
5. Where is the Intake Air Temperature Sensor 2 located on a 2008 Ford Fusion?
The IAT Sensor 2 is typically integrated into the Mass Air Flow (MAF) sensor or located near the air intake system.
6. Can I drive my 2008 Ford Fusion with a P1115 code?
While the car may still be drivable, it is not recommended as the issue could lead to poor performance, reduced fuel economy, and potential engine damage over time.
7. How can I fix the P1115 code on my Ford Fusion?
Repairs may include replacing the IAT sensor, repairing or replacing damaged wiring, cleaning electrical connectors, or reprogramming/updating the PCM if needed.
8. How much does it cost to fix the P1115 code on a 2008 Ford Fusion?
Repair costs vary, but replacing an IAT sensor typically costs between $50 and $150 for parts and labor. Additional wiring or PCM repairs may increase the cost.
9. Can a dirty air filter cause the P1115 code in a 2008 Ford Fusion?
A dirty air filter itself won’t trigger P1115, but it can contribute to airflow issues that may indirectly affect sensor readings. Replace the air filter if it’s clogged.
10. Does clearing the P1115 code with an OBDII scanner fix the problem?
Clearing the code will remove it temporarily, but the underlying issue must be diagnosed and repaired to prevent the code from returning.
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