P1201 2016 GMC Sierra Code - Transmission Range Redundant Command Message Counter Incorrect
Quick Answer
The P1201 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Transmission Range Redundant Command Message Counter is incorrect. Common causes include Faulty transmission control module (TCM), Faulty engine control module (ECM), Wiring or connection issues between TCM and ECM. 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 control module (TCM), Faulty engine control module (ECM), Wiring or connection issues between TCM and ECM.
- 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 P1201 2016 GMC Sierra Description
The P1201 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Transmission Range Redundant Command Message Counter is incorrect. This code typically points to a communication issue between the transmission control module (TCM) and the engine control module (ECM). The TCM and ECM exchange messages to ensure that the transmission is in the correct gear and that the engine is delivering the appropriate power. When the counter is incorrect, it means that the number of messages sent and received by the modules does not match up, indicating a potential problem with the communication system.
Common Causes of P1201 2016 GMC Sierra
- Faulty transmission control module (TCM)
- Faulty engine control module (ECM)
- Wiring or connection issues between TCM and ECM
- Software or programming issues
- Electrical system malfunctions
Symptoms of P1201 2016 GMC Sierra
- Check engine light illuminated
- Erratic shifting patterns
- Harsh gear changes
- Transmission slipping
- Reduced fuel efficiency
How to Fix P1201 2016 GMC Sierra
- Perform a thorough diagnostic scan to confirm the P1201 code and identify any additional related codes.
- Inspect the wiring harness and connections between the TCM and ECM for any signs of damage or corrosion. Repair or replace as necessary.
- Check for any software updates or reprogramming required for the TCM and ECM to address communication issues.
- Test drive the vehicle to ensure that the transmission is shifting correctly and that the TCM and ECM are communicating effectively.
- Clear the DTCs and reset the check engine light to verify that the issue has been resolved.
Cost to Fix P1201 2016 GMC Sierra
The typical repair costs for addressing a P1201 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts for this repair can range from $200 to $500, with labor costs adding an additional $100 to $300. Overall, the total repair cost for resolving a P1201 code is likely to fall between $300 and $800. It is important to note that these estimates are rough averages, and actual costs may vary based on factors such as the location of the repair shop, the make and model of the vehicle, and any additional repairs or services needed. It is recommended to consult with a qualified mechanic or dealership for a more accurate cost estimate based on the specific circumstances of the vehicle.
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