P1201 2014 GMC Sierra Code - Transmission Range Redundant Command Message Counter Incorrect
Quick Answer
The P1201 diagnostic trouble code (DTC) on a 2014 GMC Sierra indicates that the Transmission Range Redundant Command Message Counter is incorrect. Common causes include Faulty wiring or connectors between TCM and ECM, Malfunctioning TCM or ECM, Software glitches. 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 2014 GMC Sierra indicates Transmission Range Redundant Command Message Counter Incorrect.
- Common causes
- Common causes include Faulty wiring or connectors between TCM and ECM, Malfunctioning TCM or ECM, Software glitches.
- 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 2014 GMC Sierra Description
The P1201 diagnostic trouble code (DTC) on a 2014 GMC Sierra indicates that the Transmission Range Redundant Command Message Counter is incorrect. This code is typically related to a communication error between the transmission control module (TCM) and the engine control module (ECM). The TCM and ECM work together to ensure proper transmission operation by sending and receiving messages related to gear selection, shift points, and other transmission functions. When the message counter is incorrect, it means that the TCM and ECM are not in sync, which can lead to transmission issues.
Common Causes of P1201 2014 GMC Sierra
- Faulty wiring or connectors between TCM and ECM
- Malfunctioning TCM or ECM
- Software glitches
- Sensor failures
Symptoms of P1201 2014 GMC Sierra
- Erratic shifting
- Harsh engagement
- Transmission slippage
- Limp mode activation
How to Fix P1201 2014 GMC Sierra
- Perform a thorough diagnostic scan to retrieve the P1201 code and any related codes.
- Inspect wiring and connectors between TCM and ECM for damage or corrosion.
- Test TCM and ECM functionality using manufacturer-specific diagnostic tools.
- Update TCM and ECM software if necessary.
- Replace any faulty sensors or components as needed.
Cost to Fix P1201 2014 GMC Sierra
The typical repair costs for addressing a P1201 code on a 2014 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of parts and labor for this repair could range from $200 to $800. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local repair shops for a more accurate estimate.
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