P189C GMC 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 GMC 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.
Code P189C GMC Description
What are the Possible Causes of the DTC P189C GMC?
- 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 GMC?
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 GMC 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 GMC code?
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Need Help with the Code?
Get the P189C GMC code diagnosed by a professional: Find a repair shop in your area
Information for Specific GMC Models
- P189C 2014 GMC Sierra — Transmission Range Command Message Performance
- P189C 2015 GMC Sierra — Transmission Range Command Message Performance
- P189C 2016 GMC Sierra — Transmission Range Command Message Performance
- P189C 2017 GMC Sierra — Transmission Range Command Message Performance
- P189C 2018 GMC Sierra — Transmission Range Command Message Performance
Frequently Asked Questions about P189C GMC Code
1. What are the common symptoms of OBDII code P189C GMC?
- Common symptoms of code P189C GMC include erratic shifting behavior, transmission slipping, and difficulty engaging certain gears.
2. What can cause the OBDII code P189C GMC to trigger?
- The code P189C GMC is typically triggered by issues with the transmission range command message performance, which may be caused by a faulty transmission range sensor or wiring issues.
3. How serious is the OBDII code P189C GMC?
- The code P189C GMC should be addressed promptly, as it can lead to drivability issues and potential damage to the transmission if left unresolved.
4. How do I diagnose the OBDII code P189C GMC?
- Diagnosing the code P189C GMC involves using a scan tool to read the code and perform further testing on the transmission range sensor and related components.
5. Can I continue driving with the OBDII code P189C GMC present?
- It is not recommended to continue driving with the code P189C GMC present, as it can affect the performance and reliability of the transmission.
6. What are some repair tips for fixing the OBDII code P189C GMC?
- Repair tips for resolving the code P189C GMC may include checking and repairing any damaged wiring, replacing the transmission range sensor, or reprogramming the transmission control module.
7. How much does it cost to repair the OBDII code P189C GMC?
- The cost of repairing the code P189C GMC can vary depending on the specific issue causing the code and the labor rates of the repair shop. It is recommended to obtain quotes from different mechanics.
8. Can I reset the OBDII code P189C GMC on my own?
- You can attempt to reset the code P189C GMC using an OBDII scan tool, but it is important to address the underlying issue causing the code to prevent it from reoccurring.
9. Are there any recalls related to the OBDII code P189C GMC?
- Check with the manufacturer or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any recalls related to the code P189C GMC for your specific vehicle.
10. How can I prevent the OBDII code P189C GMC from coming back?
- To prevent the code P189C GMC from reoccurring, it is essential to address any underlying issues promptly, perform regular maintenance on the transmission system, and drive your vehicle responsibly.
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