P1115 Lincoln 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 Lincoln 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 Lincoln 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 Lincoln?
- 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 Lincoln?
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 Lincoln 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 Lincoln Code
1. What does the OBDII code P1115 mean on a Lincoln?
P1115 indicates a "Intake Air Temperature Sensor 2 Circuit High," meaning the vehicle's ECU is detecting a problem with the second intake air temperature (IAT) sensor's electrical circuit, showing a voltage higher than expected.
2. What are the common symptoms of code P1115 on a Lincoln?
Symptoms may include poor engine performance, reduced fuel economy, rough idling, difficulty starting, or the Check Engine Light being illuminated.
3. What causes the P1115 code to appear in a Lincoln?
Common causes include a faulty IAT sensor, damaged or corroded wiring or connectors, a short or open circuit, or an engine control module (ECM) issue.
4. Can a dirty air filter cause a P1115 code on a Lincoln?
While a dirty air filter can affect airflow and engine performance, it typically doesn't cause the P1115 code, which specifically relates to the IAT sensor circuitry.
5. How do I diagnose the P1115 code on my Lincoln?
Start by inspecting the IAT sensor and its wiring for visible damage, corrosion, or disconnection. Use a multimeter to check the sensor's resistance and the wiring's continuity. If no issues are found, test the ECU.
6. Can I drive my Lincoln with the P1115 code active?
Driving with the P1115 code may be possible, but it can lead to poor performance and potentially cause further damage to the engine or emissions system. Prompt diagnosis and repair are recommended.
7. How do I fix the P1115 code on a Lincoln?
Repairs may include replacing the faulty IAT sensor, repairing or replacing damaged wiring or connectors, or, in rare cases, reprogramming or replacing the ECU.
8. Where is the IAT sensor 2 located on a Lincoln?
The IAT sensor 2 is typically located in the intake manifold or air intake housing, downstream of the air filter. Consult your vehicle's service manual for the exact location.
9. How much does it cost to repair the P1115 code on a Lincoln?
Repair costs can vary depending on the issue. Replacing an IAT sensor typically costs $50–$150, while wiring repairs or ECU replacement may cost more.
10. Can a P1115 code cause my Lincoln to fail an emissions test?
Yes, a P1115 code can affect engine performance and emissions output, potentially causing your vehicle to fail an emissions test.
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