Engine-Codes - Generic - P111D

P111D - Intake Air Temperature Sensor 1 – Fuel Temperature Sensor 2 Correlation

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P111D Possible Causes

  • Faulty Intake Air Temperature Sensor 1
  • Intake Air Temperature Sensor 1 harness is open or shorted
  • Intake Air Temperature Sensor 1 circuit poor electrical connection
  • Faulty Fuel Temperature Sensor 2
  • Fuel Temperature Sensor 2 harness is open or shorted
  • Fuel Temperature Sensor 2 circuit poor electrical connection

How is the P111D code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the cost to diagnose the P111D code

Labor: 1.0

The cost to diagnose the P111D code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P111D Meaning

The Fuel Temperature Sensor 2 and Intake Air Temperature (IAT) Sensor 1 are variable resistors. The fuel temperature sensor 2 is located at the fuel rail and the IAT Sensor 1 is part of the mass air flow intake air temperature (MAF/IAT) sensor assembly. The engine control module (ECM) supplies 5 V to the signal circuits, and a ground for each sensor's low reference circuit. The ECM monitors the and Fuel Temperature Sensor 2 and IAT Sensor 1 circuits in order to calculate the temperature of the fuel and air. The ECM monitors the Fuel Temperature Sensor 2 and IAT Sensor 1 signals for excessively high or low voltages, or for a voltage that is not in correlation with the other sensor's start up signal.

More Information

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Information for specific makes

  • P111D CHEVROLET Intake Air Temperature Sensor 1 – Fuel Temperature Sensor 2 Correlation
  • P111D GMC Intake Air Temperature Sensor 1 – Fuel Temperature Sensor 2 Correlation

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