P1115 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 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 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?
- 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?
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 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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Information for Specific Makes
- P1115 Acura — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Audi — HO2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 1
- P1115 Buick — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Cadillac — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Chevrolet — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Chrysler — General Temperature Rationality
- P1115 Dodge — General Temperature Rationality
- P1115 Ford — Intake Air Temperature Sensor 2 Circuit High
- P1115 GMC — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Honda — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Hyundai — Engine Coolant Temperature Sensor Short Circuit- Intermittent High Input
- P1115 Isuzu — ECT Sensor Circuit Intermittent Voltage High
- P1115 Jeep — General Temperature Rationality
- P1115 KIA — HO2S Circuit Low Voltage Bank 1 Sensor 1
- P1115 KIA — Engine Coolant Temperature Sensor Signal From ECU to TCU
- P1115 Lexus — Coolant Temperature Sensor Circuit For Heat Storage System
- P1115 Lincoln — Intake Air Temperature Sensor 2 Circuit High
- P1115 Mercury — Intake Air Temperature Sensor 2 Circuit High
- P1115 Mitsubishi — General Temperature Rationality
- P1115 Pontiac — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Saturn — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Scion — Coolant Temperature Sensor Circuit For Heat Storage System
- P1115 Subaru — Engine Torque Control Cut Signal Circuit High Input
- P1115 Suzuki — Engine Coolant Temperature Sensor Circuit Intermittent High Voltage
- P1115 Toyota — Coolant Temperature Sensor Circuit For Heat Storage System
- P1115 Volkswagen — HO2S Sensor Heater Circuit Short To Ground Bank 1 Sensor 1
Frequently Asked Questions about P1115 Code
1. What are common symptoms of OBDII code P1115 (Intake Air Temperature Sensor 2 Circuit High)?
The common symptoms of P1115 include poor fuel economy, rough idling, engine misfires, and a decrease in overall engine performance.
2. What can cause OBDII code P1115 to trigger?
Code P1115 is typically triggered by a faulty intake air temperature sensor, a damaged sensor wiring harness, or a poor electrical connection to the sensor.
3. How can I diagnose the cause of OBDII code P1115?
To diagnose P1115, you can use a multimeter to test the intake air temperature sensor's resistance, check the sensor wiring for damage, and inspect the sensor connector for corrosion or loose pins.
4. Can a dirty air filter cause OBDII code P1115 to set?
Yes, a dirty air filter can affect the intake air temperature sensor readings, potentially leading to code P1115. It's important to check and replace the air filter if necessary.
5. Is it safe to continue driving with OBDII code P1115 illuminated?
While the vehicle may still be operable with code P1115, it's not recommended to continue driving for an extended period. Ignoring the issue can lead to further damage and decreased engine efficiency.
6. How do I repair OBDII code P1115?
Repairing P1115 typically involves replacing the faulty intake air temperature sensor, repairing damaged wiring, or addressing any loose connections in the sensor circuit.
7. Can I reset OBDII code P1115 without fixing the underlying issue?
Resetting the code without addressing the underlying problem will only temporarily turn off the check engine light. The issue causing P1115 will likely trigger the code again if not resolved.
8. Is it possible to prevent OBDII code P1115 from occurring?
Regular maintenance, such as replacing the air filter at recommended intervals and keeping the intake system clean, can help prevent issues that may trigger code P1115.
9. How long does it typically take to repair OBDII code P1115?
The repair time for P1115 can vary depending on the exact cause of the issue. In most cases, diagnosing and repairing the problem can take anywhere from 1 to 3 hours.
10. Can a mechanic help with diagnosing and repairing OBDII code P1115?
Yes, a qualified mechanic can assist in diagnosing and repairing OBDII code P1115. They have the tools and expertise to efficiently identify the issue and perform the necessary repairs.
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