AutoCodes – GMC – P1201 2016 GMC Sierra

P1201 2016 GMC Sierra Code - Transmission Range Redundant Command Message Counter Incorrect

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Transmission Range Redundant, Transmission Range Redundant harness is open or shorted, Transmission Range Redundant circuit poor electrical connection. 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: P1201 2016 GMC Sierra indicates Transmission Range Redundant Command Message Counter Incorrect.
Common causes: Common causes include Faulty Transmission Range Redundant, Transmission Range Redundant harness is open or shorted, Transmission Range Redundant circuit poor electrical connection.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 212

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1201 2016 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when Transmission Range Redundant Command Message Counter is Incorrect.

OBDII Code P1201 2016 GMC Sierra - Transmission Range Redundant Command Message Counter Incorrect - AutoCodes.com — P1201 2016 GMC Sierra Code - Transmission Range Redundant Command Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P1201 2016 GMC Sierra?

Faulty Transmission Range Redundant
Transmission Range Redundant harness is open or shorted
Transmission Range Redundant circuit poor electrical connection

How to Fix the DTC P1201 2016 GMC Sierra?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1201 2016 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1201 2016 GMC Sierra code?

Need more information on how to fix the P1201 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1201 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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.