P10C7 2018 GMC Sierra Code - Reductant Control System Signal Message Counter Incorrect
Quick Answer
Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Common causes include Faulty Reductant Control System. 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
- P10C7 2018 GMC Sierra indicates Reductant Control System Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Reductant Control System.
- 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 P10C7 2018 GMC Sierra Description
What are the Possible Causes of the DTC P10C7 2018 GMC Sierra?
- Faulty Reductant Control System
How to Fix the DTC P10C7 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 P10C7 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 P10C7 2018 GMC Sierra code?
Need more information on how to fix the P10C7 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P10C7 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P10C7 2018 GMC Sierra Code
1. What does the OBDII code P10C7 mean on a 2018 GMC Sierra?
P10C7 indicates an issue with the Reductant Control System, specifically that the signal message counter is incorrect, which may disrupt proper communication between the reductant control module and other systems.
2. What are common symptoms of code P10C7 on a GMC Sierra?
Symptoms may include the check engine light turning on, reduced engine power, or issues with the diesel exhaust fluid (DEF) system.
3. What causes the P10C7 code to appear on a 2018 GMC Sierra?
Common causes include faulty wiring or connectors in the reductant control system, a malfunctioning reductant control module, or communication errors between modules.
4. Can driving with code P10C7 damage my GMC Sierra?
While driving may not immediately damage the vehicle, prolonged operation with this code can lead to DEF system malfunction, increased emissions, and possible engine performance issues.
5. How can I diagnose the P10C7 code on my GMC Sierra?
Diagnose by using an OBDII scanner to confirm the code, then inspect wiring and connectors for damage, and test the reductant control module for proper operation.
6. How do I fix the P10C7 code on a 2018 GMC Sierra?
Repairs may include replacing damaged wiring or connectors, updating or reprogramming the reductant control module, or replacing the module if it's defective.
7. Does the P10C7 code require professional repair?
While some fixes like checking wiring can be done by a skilled DIYer, module replacement or reprogramming often require specialized tools and knowledge, so professional repair is recommended.
8. Is the reductant control module the main cause of the P10C7 code?
Not always; wiring issues or communication faults between modules can also cause this code. Testing the module is essential to confirm the root cause.
9. Will clearing the P10C7 code solve the problem?
Clearing the code may temporarily turn off the check engine light, but if the underlying issue isn’t addressed, the code will likely return.
10. How much does it cost to repair the P10C7 code on a GMC Sierra?
Repair costs vary depending on the cause, ranging from $100 for minor wiring repairs to $500 or more for module replacement and reprogramming.
Discuss the causes and fixes for P10C7 2018 GMC Sierra OBDII Code
Code P10C7 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
