AutoCodes.com | All About OBDII Engine Codes
AutoCodes - GMC - P111D GMC

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

- Code Popularity: 2,146 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
Share on Facebook   Share on Twitter   Share on Linkedin

What are the Possible Causes of the DTC P111D GMC?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other 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
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC P111D GMC?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Search for P111D GMC Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P111D GMC code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code P111D GMC Description

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.

OBDII Code P111D GMC - Intake Air Temperature Sensor 1 – Fuel Temperature Sensor 2 Correlation  - AutoCodes.com
P111D GMC Code - Intake Air Temperature Sensor 1 – Fuel Temperature Sensor 2 Correlation

Need More Information on the Code?

Need more information on how to fix the P111D GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P111D GMC code diagnosed by a professional: Find a repair shop in your area

Code P111D GMC comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P111D GMC code? Have you replaced any parts?
Any information is appreciated. Thanks