AutoCodes – Chevrolet – P189C Chevrolet

P189C Chevrolet Code - Transmission Range Command Message Performance

Quick Answer

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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: P189C Chevrolet indicates Transmission Range Command Message Performance.
Common causes: Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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.

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Code Popularity 1,829

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 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P189C Chevrolet 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 the Transmission Range Command Message Performance.

OBDII Code P189C Chevrolet - Transmission Range Command Message Performance - AutoCodes.com — P189C Chevrolet Code - Transmission Range Command Message Performance

What does this mean?

What are the Possible Causes of the DTC P189C Chevrolet?

Faulty Transmission Control Module (TCM)
Transmission Control Module harness is open or shorted
Transmission Control Module circuit poor electrical connection

How to Fix the DTC P189C Chevrolet?

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 P189C Chevrolet 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 P189C Chevrolet code?

Need more information on how to fix the P189C Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P189C Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P189C 2014 Chevrolet Silverado — Transmission Range Command Message Performance
P189C 2015 Chevrolet Silverado — Transmission Range Command Message Performance
P189C 2016 Chevrolet Silverado — Transmission Range Command Message Performance
P189C 2017 Chevrolet Silverado — Transmission Range Command Message Performance
P189C 2018 Chevrolet Silverado — Transmission Range Command Message Performance

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.

Frequently Asked Questions about P189C Chevrolet Code

1. What are common symptoms of OBDII code P189C in a Chevrolet vehicle?

The common symptoms of code P189C include erratic shifting, transmission slipping, and difficulty engaging gears.

2. What can cause the OBDII code P189C in a Chevrolet vehicle?

Possible causes of code P189C include a faulty transmission range sensor, damaged wiring or connectors, or a malfunctioning transmission control module.

3. How serious is OBDII code P189C in a Chevrolet vehicle?

Code P189C can lead to significant transmission issues if not addressed promptly, potentially causing further damage to the transmission system.

4. How can I diagnose OBDII code P189C in my Chevrolet vehicle?

Diagnosing code P189C typically involves using a scan tool to retrieve the code and then performing a thorough inspection of the transmission range sensor, wiring, and connectors.

5. Can I continue driving my Chevrolet with OBDII code P189C?

It is not recommended to continue driving your Chevrolet with code P189C as it can lead to further transmission problems and potential safety hazards.

6. How can I repair OBDII code P189C in my Chevrolet vehicle?

Repairing code P189C may involve replacing the transmission range sensor, repairing damaged wiring or connectors, or reprogramming the transmission control module.

7. Is it possible to clear OBDII code P189C in a Chevrolet vehicle without fixing the underlying issue?

Clearing the code without fixing the underlying issue is not recommended, as the problem will likely reoccur, leading to continued transmission issues.

8. How much does it typically cost to repair OBDII code P189C in a Chevrolet vehicle?

The cost of repairing code P189C can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P189C in a Chevrolet vehicle?

While some aspects of diagnosing and repairing code P189C can be tackled by DIY enthusiasts, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

10. How can I prevent OBDII code P189C from occurring in my Chevrolet vehicle?

Regular maintenance, including checking and replacing worn transmission components, can help prevent code P189C from occurring in your Chevrolet vehicle.