P150C 2017 GMC Sierra Code - Transmission Control Module Engine Speed Request Signal Message Counter Incorrect
Quick Answer
To improve vehicle shift, and feel, the Transmission Control Module (TCM) is constantly sending the Engine Control Module (ECM) serial data messages with information regarding its request for modifying engine speed or torque. 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
- P150C 2017 GMC Sierra indicates Transmission Control Module Engine Speed Request Signal Message Counter Incorrect.
- 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 P150C 2017 GMC Sierra Description
What are the Possible Causes of the DTC P150C 2017 GMC Sierra?
- 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 P150C 2017 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 P150C 2017 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.
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Frequently Asked Questions about P150C 2017 GMC Sierra Code
1. What does the OBDII code P150C mean on a 2017 GMC Sierra?
The P150C code indicates that the Transmission Control Module (TCM) has detected an incorrect engine speed request signal message counter from the Engine Control Module (ECM).
2. What are the symptoms of the P150C code in a 2017 GMC Sierra?
Symptoms may include reduced engine performance, erratic shifting, transmission warning lights, and possible activation of limp mode.
3. What causes the P150C code on a 2017 GMC Sierra?
Common causes include faulty communication between the TCM and ECM, damaged wiring or connectors, software issues in the modules, or a malfunctioning TCM or ECM.
4. Can I drive my 2017 GMC Sierra with the P150C code?
Driving with this code is not recommended, as it may lead to transmission performance issues and further damage to the powertrain system.
5. How do I diagnose the P150C code on my 2017 GMC Sierra?
Start by inspecting the wiring and connectors between the TCM and ECM for damage, check for software updates, and use a scan tool to monitor communication signals between the modules.
6. How do I fix the P150C code on a 2017 GMC Sierra?
Repairs may involve repairing or replacing damaged wiring, updating module software, or replacing the TCM or ECM if they are faulty.
7. Can a low battery cause the P150C code in a 2017 GMC Sierra?
Yes, a weak or low battery can cause communication errors between the modules, potentially triggering the P150C code.
8. Is the P150C code covered under warranty for a 2017 GMC Sierra?
It may be covered under the powertrain or emissions warranty if the vehicle is still within the coverage period. Check with your local GMC dealer for confirmation.
9. Will resetting the code fix the P150C issue on a 2017 GMC Sierra?
Clearing the code without addressing the root cause is not a permanent fix, as the code will likely return if the underlying issue persists.
10. How much does it cost to fix the P150C code on a 2017 GMC Sierra?
Repair costs can vary depending on the issue, ranging from $100 for minor wiring repairs to over $1,000 if module replacement is needed.
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