AutoCodes – GMC – P10C8 2015 GMC Sierra

P10C8 2015 GMC Sierra Code - Reductant Temperature 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 Temperature Sensor, Reductant Temperature Sensor harness is open or shorted, Reductant Temperature Sensor 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: P10C8 2015 GMC Sierra indicates Reductant Temperature Signal Message Counter Incorrect.
Common causes: Common causes include Faulty Reductant Temperature Sensor, Reductant Temperature Sensor harness is open or shorted, Reductant Temperature Sensor 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.

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Code Popularity 246

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 26, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P10C8 2015 GMC Sierra Description

Control modules connected to the serial data circuits monitor the communication during normal vehicle operation. Operating information and commands are exchanged among the control modules. Each module on the serial data circuit maintains a transmit error counter and a receive error counter. The counter values increase with detected errors and decrease with error-free messages. The Diagnostic Trouble Code (DTC) will be set when the Reductant Temperature Signal Message Counter is Incorrect.

OBDII Code P10C8 2015 GMC Sierra - Reductant Temperature Signal Message Counter Incorrect - AutoCodes.com — P10C8 2015 GMC Sierra Code - Reductant Temperature Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P10C8 2015 GMC Sierra?

Faulty Reductant Temperature Sensor
Reductant Temperature Sensor harness is open or shorted
Reductant Temperature Sensor circuit poor electrical connection

How to Fix the DTC P10C8 2015 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 P10C8 2015 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 P10C8 2015 GMC Sierra code?

Need more information on how to fix the P10C8 2015 GMC Sierra code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P10C8 2015 GMC Sierra Code

1. What does the OBDII code P10C8 mean on a 2015 GMC Sierra?

The P10C8 code indicates that the reductant temperature signal message counter is incorrect, typically related to the DEF (Diesel Exhaust Fluid) system.

2. What are common symptoms of the P10C8 code in a 2015 GMC Sierra?

Symptoms may include a check engine light, DEF system warnings, reduced engine performance, or limited vehicle speed.

3. What causes the P10C8 code on a 2015 GMC Sierra?

Possible causes include a defective reductant temperature sensor, wiring or connector issues, a malfunctioning DEF control module, or software glitches.

4. How do I diagnose the P10C8 code on my GMC Sierra?

Diagnosis involves checking the reductant temperature sensor, inspecting wiring and connectors for damage, and using a scan tool to monitor sensor data and communication.

5. Can I still drive my 2015 GMC Sierra with the P10C8 code?

While the vehicle may still be drivable, ignoring the code can lead to reduced engine performance and DEF system malfunctions, so itâ€™s best to address it promptly.

6. How do I fix the P10C8 code on a GMC Sierra?

Repairs may include replacing the reductant temperature sensor, repairing damaged wiring or connectors, or updating the DEF system software.

7. How much does it cost to fix the P10C8 code on a 2015 GMC Sierra?

Repair costs can vary but typically range from $150 to $500 depending on the issue, such as sensor replacement or module reprogramming.

8. Can a faulty reductant temperature sensor trigger the P10C8 code?

Yes, a faulty or malfunctioning reductant temperature sensor is a common cause of the P10C8 code.

9. Is a software update required to fix the P10C8 code on a 2015 GMC Sierra?

In some cases, a software update for the DEF system may be necessary to resolve communication or programming issues.

10. Will clearing the P10C8 code solve the problem?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely return until properly repaired.