P10C8 2017 GMC Sierra Code - Reductant Temperature Signal Message Counter Incorrect
Quick Answer
The P10C8 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Reductant Temperature Signal Message Counter is incorrect. Common causes include Faulty reductant temperature sensor, Wiring or connector issues in the reductant temperature sensor circuit, ECM software issues. 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 2017 GMC Sierra indicates Reductant Temperature Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty reductant temperature sensor, Wiring or connector issues in the reductant temperature sensor circuit, ECM software issues.
- 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 P10C8 2017 GMC Sierra Description
The P10C8 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Reductant Temperature Signal Message Counter is incorrect. In modern diesel vehicles, a selective catalytic reduction (SCR) system is used to reduce harmful emissions. The reductant temperature sensor is a crucial component of this system, as it measures the temperature of the diesel exhaust fluid (DEF) before it enters the SCR catalyst. The reductant temperature signal message counter being incorrect suggests that the signal being sent by the sensor does not match the expected values, potentially leading to issues with the SCR system's efficiency and overall performance.
Common Causes of P10C8 2017 GMC Sierra
- Faulty reductant temperature sensor
- Wiring or connector issues in the reductant temperature sensor circuit
- ECM software issues
- Contaminated DEF
- Exhaust system leaks
Symptoms of P10C8 2017 GMC Sierra
- Check engine light illuminated
- Reduced fuel efficiency
- Poor engine performance
- Increased emissions
- Difficulty starting the vehicle
How to Fix P10C8 2017 GMC Sierra
- Begin by using a diagnostic scanner to retrieve the specific trouble code and confirm the issue.
- Inspect the reductant temperature sensor and its wiring for any visible damage or corrosion. Replace the sensor if necessary.
- Check the DEF for contamination and replace it if needed.
- Clear the DTC and perform a test drive to ensure the code does not return.
- If the issue persists, further diagnostics may be required to identify any underlying ECM software issues or exhaust system leaks.
Cost to Fix P10C8 2017 GMC Sierra
The typical repair costs for addressing a P10C8 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty reductant temperature sensor can cost between $150 and $300, including parts and labor. Additional costs may apply if further diagnostics or repairs are needed. It's important to note that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate.
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Frequently Asked Questions about P10C8 2017 GMC Sierra Code
What does the OBDII code P10C8 mean on a 2017 GMC Sierra?
The P10C8 code indicates an issue with the reductant temperature sensor, specifically that the signal message counter is incorrect or invalid.
What are the common symptoms of the P10C8 code?
Symptoms may include the check engine light turning on, poor DEF (Diesel Exhaust Fluid) system performance, or reduced engine power in severe cases.
What causes the P10C8 code to appear?
Common causes include a faulty reductant temperature sensor, damaged wiring or connectors, a malfunctioning reductant control module, or software issues in the ECM.
Can I drive my 2017 GMC Sierra with the P10C8 code active?
While it may be possible to drive, it is not recommended as it could lead to reduced DEF system efficiency and may eventually cause engine performance issues.
How is the P10C8 code diagnosed?
A mechanic will use a scan tool to confirm the code, inspect the reductant temperature sensor and its wiring, and test the sensor signal and communication with the ECM.
How do you fix the P10C8 code?
Repairs may involve replacing the reductant temperature sensor, repairing or replacing damaged wiring or connectors, or updating the ECM software.
Is the reductant temperature sensor expensive to replace?
The cost of replacing the sensor depends on labor rates and parts pricing, but it is generally a mid-range repair compared to other emissions system components.
Can a software update fix the P10C8 code?
Yes, in some cases, a software update for the ECM or reductant control module can resolve the issue if it's caused by programming errors.
What tools are required to troubleshoot the P10C8 code?
Diagnostic tools like an OBDII scanner, multimeter, and wiring diagrams are commonly used to identify the root cause of this code.
Will clearing the P10C8 code with a scanner fix the problem?
Clearing the code may turn off the check engine light temporarily, but if the underlying issue isn’t resolved, the code will likely return.
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