P1201 2018 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 2018 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.
Code P1201 2018 GMC Sierra Description
What are the Possible Causes of the DTC P1201 2018 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 2018 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 2018 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 2018 GMC Sierra code?
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Frequently Asked Questions about P1201 2018 GMC Sierra Code
1. What are the common symptoms of OBDII code P1201 in a 2018 GMC Sierra?
- Common symptoms include issues with shifting gears, transmission slippage, decreased fuel efficiency, and the illumination of the Check Engine light.
2. What does the OBDII code P1201 "Transmission Range Redundant Command Message Counter Incorrect" mean for a 2018 GMC Sierra?
- This code indicates a communication error between the transmission control module and the engine control module, specifically related to the transmission range sensor.
3. What are the possible causes of OBDII code P1201 in a 2018 GMC Sierra?
- Possible causes include a faulty transmission range sensor, damaged wiring or connectors in the transmission control circuit, software issues, or a malfunctioning transmission control module.
4. How can I diagnose OBDII code P1201 in my 2018 GMC Sierra?
- Diagnosing this code usually involves using a diagnostic scanner to retrieve the code, checking the transmission range sensor for proper operation, inspecting wiring and connectors for damage, and performing a software update if necessary.
5. Can I continue driving my 2018 GMC Sierra with OBDII code P1201?
- It is not recommended to drive the vehicle with this code present, as it can lead to further transmission problems and potential safety hazards. It is best to address the issue promptly.
6. How can OBDII code P1201 in a 2018 GMC Sierra be repaired?
- Repairing this code typically involves replacing the faulty transmission range sensor, repairing any damaged wiring or connectors, updating the software as needed, or replacing the transmission control module if necessary.
7. Is it possible to reset OBDII code P1201 in a 2018 GMC Sierra without addressing the underlying issue?
- While clearing the code temporarily may turn off the Check Engine light, the underlying issue causing the code will persist unless properly diagnosed and repaired.
8. Are there any preventive measures to avoid OBDII code P1201 in a 2018 GMC Sierra?
- Regular maintenance checks, such as inspecting and cleaning connectors, ensuring proper transmission fluid levels, and promptly addressing any transmission-related symptoms, can help prevent this code from occurring.
9. How long does it typically take to repair OBDII code P1201 in a 2018 GMC Sierra?
- The repair time can vary depending on the exact cause of the code and the availability of parts. It is recommended to consult a professional mechanic for an accurate estimate.
10. Can a DIY enthusiast with basic automotive knowledge repair OBDII code P1201 in a 2018 GMC Sierra?
- While some aspects of diagnosing and repairing this code may be within reach for DIY enthusiasts, it is recommended to consult a professional mechanic for a comprehensive and accurate repair.
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