P1115 – OBD-II DTC

OBD-II DTC P1115 – IAT Sensor (D/C) Open/Short

DTC P1115 meaning

DTC P1115 refers to a diagnostic trouble code indicating an issue with the Intake Air Temperature (IAT) sensor. Specifically, it signifies that there is an open or short circuit in the IAT sensor circuit. The IAT sensor measures the temperature of the air entering the engine, which is crucial for the engine control module (ECM) to optimize fuel injection and ignition timing.

DTC P1115 symptoms

Common symptoms associated with DTC P1115 may include:

• Check Engine Light illuminated
• Poor engine performance
• Increased fuel consumption
• Rough idling or stalling
• Difficulty starting the engine

DTC P1115 causes

Several factors can lead to the triggering of DTC P1115, including:

• Faulty IAT sensor
• Open or short circuit in the wiring harness
• Corroded or damaged connectors
• Faulty ECM
• Issues with the engine’s air intake system

DTC P1115 seriousness

DTC P1115 is considered a moderate to serious issue. While it may not cause immediate engine failure, it can lead to poor engine performance and increased emissions. Ignoring this code can result in further damage to the engine or related components, as the ECM may not be able to make the necessary adjustments for optimal performance.

How to diagnose DTC P1115

To diagnose DTC P1115, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1115 code.
2. Inspect the IAT sensor and its wiring for any visible damage or disconnections.
3. Check the resistance of the IAT sensor using a multimeter to ensure it is within specifications.
4. Test the voltage supply to the IAT sensor with the ignition on.
5. Examine the ECM for any additional trouble codes that may provide further insight.

How to fix DTC P1115 step-by-step instructions

To fix DTC P1115, follow these steps:

1. Disconnect the battery to ensure safety while working on the vehicle.
2. Inspect and repair any damaged wiring or connectors related to the IAT sensor.
3. If the IAT sensor is faulty, replace it with a new one.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Start the engine and monitor for any reoccurrence of the P1115 code.

How to erase DTC P1115

To erase DTC P1115, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the engine to ensure the code does not return.

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