P1111 – Infiniti DTC

Infiniti DTC P1111 – IAT Sensor Circuit Intermittent Voltage High

DTC P1111 meaning on Infiniti

DTC P1111 on an Infiniti refers to the Intake Air Temperature (IAT) Sensor Circuit Intermittent Voltage High. This diagnostic trouble code indicates that the engine control module (ECM) has detected a high voltage signal from the IAT sensor that is inconsistent or intermittent.

Infiniti DTC P1111 symptoms

Symptoms associated with DTC P1111 on an Infiniti may include:

• Check Engine Light (MIL) illuminated
• Decreased fuel efficiency
• Engine running rough or stalling
• Reduced engine performance

Infiniti DTC P1111 causes

Common causes of DTC P1111 on an Infiniti include:

• Faulty IAT sensor
• Wiring or connector issues in the IAT sensor circuit
• Intermittent electrical connection problems

Infiniti DTC P1111 seriousness

While DTC P1111 may not always result in immediate drivability issues, it is important to address this code promptly to prevent potential engine performance problems and further damage.

How to diagnose DTC P1111 on Infiniti

To diagnose DTC P1111 on an Infiniti, follow these steps:

1. Inspect the IAT sensor and its wiring for any visible damage or corrosion.
2. Check the IAT sensor resistance using a multimeter to ensure it is within specifications.
3. Perform a thorough inspection of the IAT sensor circuit for any loose connections or shorts.
4. Use a scan tool to monitor IAT sensor data and compare it to ambient temperature readings.

How to fix DTC P1111 on Infiniti

To fix DTC P1111 on an Infiniti, consider the following:

1. Replace the faulty IAT sensor if it is found to be out of specification.
2. Repair any damaged wiring or connectors in the IAT sensor circuit.
3. Clean any corrosion from the connectors and ensure a secure connection.

How to erase DTC P1111 on Infiniti

To erase DTC P1111 on an Infiniti, use a scan tool to clear the code after the underlying issue has been addressed. This will reset the Check Engine Light and allow for monitoring of the system to ensure the code does not return.

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