AutoCodes.com | All About OBDII Engine Codes
AutoCodes - GMC - P1623 GMC

P1623 GMC Code - Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions

- Code Popularity: 3,159 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 P1623 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 Transmission Fluid Temperature (TFT)
  • Transmission Fluid Temperature (TFT) harness is open or shorted
  • Transmission Fluid Temperature (TFT) circuit poor electrical connection
⚠ Does your GMC have Safety Recalls? → Check here

How to Fix the DTC P1623 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 P1623 GMC Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1623 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 P1623 GMC Description

With the cold engine startup completed, engine running, the Powertrain Control Module (PCM) detects a fault in the PCM pull-up resistor used to revise Engine Coolant Temperature (ECT) resolution throughout the complete engine operating range.

OBDII Code P1623 GMC - Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions - AutoCodes.com
P1623 GMC Code - Transmission Fluid Temperature Sensor Pullup Resistor Circuit Conditions

Need More Information on the Code?

Need more information on how to fix the P1623 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1623 GMC code diagnosed by a professional: Find a repair shop in your area

Code P1623 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 P1623 GMC code? Have you replaced any parts?
Any information is appreciated. Thanks