AutoCodes – Cadillac – P10C8 Cadillac

P10C8 Cadillac 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 Cadillac 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 376

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 Cadillac 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 Cadillac - Reductant Temperature Signal Message Counter Incorrect - AutoCodes.com — P10C8 Cadillac Code - Reductant Temperature Signal Message Counter Incorrect

What does this mean?

What are the Possible Causes of the DTC P10C8 Cadillac?

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 Cadillac?

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 Cadillac 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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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 Cadillac Code

1. What does the OBDII code P10C8 mean on a Cadillac?

The code P10C8 indicates an issue with the reductant temperature signal message counter being incorrect, typically related to the diesel exhaust fluid (DEF) system.

2. What are common symptoms of code P10C8 in a Cadillac?

Symptoms may include the check engine light turning on, reduced engine performance, or poor DEF system operation.

3. What causes code P10C8 on a Cadillac?

Common causes include a faulty reductant temperature sensor, issues with the DEF control module, wiring problems, or a software glitch.

4. How do you diagnose code P10C8 in a Cadillac?

Diagnosis involves using a scan tool to check for related codes, inspecting the reductant temperature sensor, verifying wiring connections, and testing the DEF control module.

5. Can code P10C8 cause drivability issues?

Yes, in some cases, this code can lead to reduced engine performance or limited vehicle speed due to DEF system malfunctions.

6. Is it safe to drive with code P10C8 on a Cadillac?

While the vehicle may still be drivable, ignoring this code can lead to further DEF system issues and potential emissions non-compliance.

7. How is code P10C8 fixed on a Cadillac?

Repairs may involve replacing a faulty reductant temperature sensor, repairing damaged wiring, or reprogramming the DEF control module.

8. How much does it cost to fix code P10C8 on a Cadillac?

Repair costs can vary but typically range from $150 to $500, depending on whether sensor replacement or module reprogramming is required.

9. Can a software update fix code P10C8 on a Cadillac?

Yes, in some cases, a software update for the DEF control module may resolve this issue if it's caused by a programming error.

10. How can I prevent code P10C8 from recurring on my Cadillac?

Regular maintenance of the DEF system, ensuring proper fluid levels, and addressing wiring issues promptly can help prevent this code from reappearing.