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Engine-Codes – Chevrolet – P1111 2014 Chevrolet Silverado

P1111 2014 Chevrolet Silverado Code - Intake Air Temperature Sensor Circuit Intermittent High Voltage

Quick Answer

The P1111 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates an issue with the Intake Air Temperature (IAT) Sensor Circuit intermittently reporting high voltage. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged wiring or connectors in the IAT sensor circuit, Corrosion or contamination in the sensor connector. 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
P1111 2014 Chevrolet Silverado indicates Intake Air Temperature Sensor Circuit Intermittent High Voltage.
Common causes
Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged wiring or connectors in the IAT sensor circuit, Corrosion or contamination in the sensor connector.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P1111 2014 Chevrolet Silverado Description

The P1111 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates an issue with the Intake Air Temperature (IAT) Sensor Circuit intermittently reporting high voltage. The IAT sensor is a crucial component of the vehicle's engine management system, responsible for measuring the temperature of the incoming air to the engine. This information is used by the Engine Control Module (ECM) to adjust fuel delivery and ignition timing for optimal performance and efficiency.

OBDII Code P1111 2014 Chevrolet Silverado - Intake Air Temperature Sensor Circuit Intermittent High Voltage
P1111 2014 Chevrolet Silverado Code - Intake Air Temperature Sensor Circuit Intermittent High Voltage

Common Causes of P1111 2014 Chevrolet Silverado

  1. Faulty Intake Air Temperature (IAT) sensor
  2. Damaged wiring or connectors in the IAT sensor circuit
  3. Corrosion or contamination in the sensor connector
  4. ECM software or hardware issues
  5. Intake air leaks near the sensor

Symptoms of P1111 2014 Chevrolet Silverado

  1. Check Engine Light (CEL) illuminated
  2. Reduced fuel efficiency
  3. Engine running rough or misfiring
  4. Engine stalling or hesitation
  5. Poor acceleration or power loss

How to Fix P1111 2014 Chevrolet Silverado

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific DTC and freeze frame data.
  2. Inspect the wiring and connectors in the IAT sensor circuit for any damage, corrosion, or loose connections.
  3. Test the IAT sensor using a multimeter to check for proper resistance values and voltage readings.
  4. If the sensor is faulty, replace it with a new OEM or high-quality aftermarket sensor.
  5. Clear the DTC and perform a test drive to verify that the repair has resolved the issue.

Cost to Fix P1111 2014 Chevrolet Silverado

The typical repair costs for addressing a P1111 code on a 2014 Chevrolet Silverado can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Most auto repair shops commonly charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.

What does this mean?

Tech Notes for P1111 2014 Chevrolet Silverado

The Intake Air Temperature (IAT) sensor 1, IAT sensor 2, Humidity sensor, MAF sensor, and BARO pressure sensor are integrated within the Mass Air Flow / Multifunction Intake Air Sensor.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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