P1116 – OBD-II DTC

OBD-II DTC P1116 – Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage

DTC P1116 meaning

DTC P1116 refers to a diagnostic trouble code indicating an intermittent high voltage condition in the Intake Air Temperature (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 delivery and ignition timing. When the voltage from the IAT sensor exceeds the expected range, this code is triggered, signaling a potential issue in the sensor or its circuit.

DTC P1116 symptoms

Common symptoms associated with DTC P1116 may include:

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

DTC P1116 causes

Several factors can lead to the triggering of DTC P1116, including:

• Faulty IAT sensor
• Wiring issues such as shorts or open circuits
• Corroded or loose electrical connections
• Faulty engine control module (ECM)
• Contaminated or damaged sensor housing

DTC P1116 seriousness

DTC P1116 can be considered serious as it affects the engine’s air-fuel mixture and overall performance. If left unaddressed, it may lead to:

• Increased emissions
• Potential engine damage due to improper fuel mixture
• Reduced fuel efficiency

It is advisable to diagnose and repair the issue promptly to maintain optimal vehicle performance.

How to diagnose DTC P1116

To diagnose DTC P1116, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1116 code.
2. Inspect the IAT sensor and its wiring for visible damage or corrosion.
3. Check the electrical connections for tightness and cleanliness.
4. Measure the voltage output of the IAT sensor with a multimeter while the engine is running.
5. Compare the readings to the manufacturer’s specifications.
6. If the readings are outside the normal range, consider replacing the IAT sensor.
7. Clear the code and perform a test drive to see if the code returns.

How to fix DTC P1116 step-by-step instructions

To fix DTC P1116, follow these step-by-step instructions:

1. Gather necessary tools: OBD-II scanner, multimeter, and basic hand tools.
2. Disconnect the vehicle’s battery to ensure safety while working on electrical components.
3. Locate the IAT sensor, typically found in the intake manifold or air intake duct.
4. Inspect the sensor and wiring for any signs of damage or corrosion.
5. Clean any corroded connections and ensure they are secure.
6. Test the IAT sensor with a multimeter to check for proper voltage output.
7. If the sensor is faulty, replace it with a new one.
8. Reconnect the battery and clear the DTC using an OBD-II scanner.
9. Perform a test drive to ensure the code does not return and the vehicle operates normally.

How to erase DTC P1116

To erase DTC P1116, 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. Access the scanner’s menu and select the option to read or clear trouble codes.
4. Follow the prompts to erase the DTC P1116 from the vehicle’s memory.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

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