AutoCodes – Generic – P10C8

P10C8 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 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 2,129
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 26, 2022
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Code P10C8 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 - Reductant Temperature Signal Message Counter Incorrect - AutoCodes.com
P10C8 Code - Reductant Temperature Signal Message Counter Incorrect

What are the Possible Causes of the DTC P10C8?

  • 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?

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 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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Information for Specific Makes

  • P10C8 Buick β€” Reductant Temperature Signal Message Counter Incorrect
  • P10C8 Cadillac β€” Reductant Temperature Signal Message Counter Incorrect
  • P10C8 Chevrolet β€” Reductant Temperature Signal Message Counter Incorrect
  • P10C8 GMC β€” Reductant Temperature Signal Message Counter Incorrect
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 Code

1. What are the common symptoms of OBDII code P10C8?

The common symptoms of OBDII code P10C8 (Reductant Temperature Signal Message Counter Incorrect) may include poor engine performance, decreased fuel efficiency, and the illumination of the check engine light.

2. What can cause the OBDII code P10C8 to trigger?

The OBDII code P10C8 can be triggered by issues such as a faulty reductant temperature sensor, wiring problems, software glitches in the engine control module (ECM), or issues with the reductant control module.

3. How can I diagnose the cause of OBDII code P10C8?

Diagnosing the cause of OBDII code P10C8 typically involves using a diagnostic scanner to retrieve the code, checking the reductant temperature sensor and its wiring for faults, and inspecting the reductant control module for any issues.

4. Is it safe to continue driving with OBDII code P10C8 present?

It is generally not recommended to continue driving with OBDII code P10C8 present, as it can lead to further damage to the vehicle's emissions system and may cause a decrease in overall engine performance.

5. Can I repair OBDII code P10C8 myself?

While some DIY enthusiasts may attempt to repair OBDII code P10C8 themselves by replacing the faulty reductant temperature sensor or fixing wiring issues, it is recommended to consult a professional mechanic for an accurate diagnosis and repair.

6. How much does it typically cost to repair OBDII code P10C8?

The cost to repair OBDII code P10C8 can vary depending on the underlying cause of the issue. Repairs may range from a simple sensor replacement costing around $100 to more complex repairs involving the reductant control module, which can cost several hundred dollars.

7. Will resetting the OBDII code P10C8 make it go away permanently?

Resetting the OBDII code P10C8 may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear once the vehicle's onboard diagnostics detect the problem again.

8. How urgent is it to address OBDII code P10C8?

It is recommended to address OBDII code P10C8 as soon as possible to prevent further damage to the vehicle's emissions system and to ensure optimal engine performance and fuel efficiency.

9. Can extreme weather conditions affect OBDII code P10C8?

Extreme weather conditions such as very high or low temperatures can potentially affect the reductant temperature sensor readings, which may lead to the triggering of OBDII code P10C8.

10. How often should I have my vehicle's emissions system checked to prevent OBDII code P10C8?

It is advisable to have your vehicle's emissions system checked regularly as part of routine maintenance, which can help prevent issues like OBDII code P10C8 from occurring.

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