P10C8 2014 GMC Sierra Code - Reductant Temperature Signal Message Counter Incorrect
Quick Answer
The P10C8 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Reductant Temperature Signal Message Counter is incorrect. Common causes include Faulty Reductant Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, leading to incorrect readings, ECM Software Glitch: A software issue within the ECM can cause it to misinterpret the sensor data, resulting in the incorrect message counter. 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 2014 GMC Sierra indicates Reductant Temperature Signal Message Counter Incorrect.
- Common causes
- Common causes include Faulty Reductant Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, leading to incorrect readings, ECM Software Glitch: A software issue within the ECM can cause it to misinterpret the sensor data, resulting in the incorrect message counter.
- 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 2014 GMC Sierra Description
The P10C8 diagnostic trouble code (DTC) for a 2014 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 refers to the number of times the sensor has sent incorrect temperature readings to the engine control module (ECM).
Common Causes of P10C8 2014 GMC Sierra
- Faulty Reductant Temperature Sensor: The sensor itself may be malfunctioning, providing inaccurate temperature readings to the ECM.
- Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal transmission, leading to incorrect readings.
- ECM Software Glitch: A software issue within the ECM can cause it to misinterpret the sensor data, resulting in the incorrect message counter.
- DEF Contamination: Contaminants in the DEF can affect the sensor's ability to accurately measure temperature, leading to incorrect readings.
Symptoms of P10C8 2014 GMC Sierra
- Check Engine Light: The most common symptom associated with this DTC is the illumination of the check engine light on the vehicle's dashboard.
- Reduced Engine Performance: The engine may experience reduced power output or acceleration due to incorrect temperature readings affecting fuel injection timing.
- Poor Fuel Economy: Incorrect temperature readings can lead to inefficient combustion, resulting in decreased fuel efficiency.
- Increased Emissions: The SCR system may not function optimally, leading to higher emissions output from the vehicle.
How to Fix P10C8 2014 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the DTC and pinpoint the source of the problem, whether it's the sensor, wiring, or ECM.
- Test the Reductant Temperature Sensor: Check the sensor's resistance and compare it to the manufacturer's specifications to determine if it's faulty.
- Inspect Wiring: Thoroughly inspect the wiring harness for any damage, corrosion, or loose connections that could be affecting the signal transmission.
- Update ECM Software: If a software glitch is suspected, update the ECM software to the latest version to potentially resolve the issue.
- Replace Reductant Temperature Sensor: If the sensor is determined to be faulty, replace it with a new one and reset the ECM to clear the DTC.
Cost to Fix P10C8 2014 GMC Sierra
The typical repair costs for addressing a P10C8 DTC can vary depending on the specific cause of the issue. In general, replacing a Reductant Temperature Sensor can cost between $100 and $300, including parts and labor. However, if wiring repairs or ECM software updates are required, the total cost may increase. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it's recommended to consult with a local auto repair shop.
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Frequently Asked Questions about P10C8 2014 GMC Sierra Code
What does the OBDII code P10C8 mean on a 2014 GMC Sierra?
P10C8 indicates an issue with the reductant temperature signal message counter, which is related to the diesel exhaust fluid (DEF) system.
What are the common symptoms of code P10C8 on a 2014 GMC Sierra?
Symptoms may include a check engine light, reduced engine performance, or warnings related to the DEF system.
What causes the P10C8 code to appear?
The most common causes include a malfunctioning reductant temperature sensor, wiring or connection issues, or a fault in the DEF control module.
Can I drive my 2014 GMC Sierra with the P10C8 code?
Driving with this code active may eventually lead to reduced power mode or engine derate, so it’s best to address the issue promptly.
How can I fix the P10C8 code on my 2014 GMC Sierra?
Inspect the reductant temperature sensor, check wiring and connectors for damage, and test the DEF control module for proper operation.
Does the P10C8 code mean I need to replace the reductant temperature sensor?
Not necessarily. First, verify the sensor's condition and check related wiring and connectors before replacing any parts.
What tools are needed to diagnose the P10C8 code?
You’ll need an OBDII scanner capable of reading manufacturer-specific codes, a multimeter for electrical testing, and possibly a repair manual for your truck.
Is the P10C8 code covered under warranty for a 2014 GMC Sierra?
It may be covered if your vehicle is still under a powertrain or emissions-related warranty. Check with your dealer for details.
Can a software update fix the P10C8 code?
In some cases, a software update for the DEF control module may resolve the issue. Check with your dealership for any available updates.
What happens if I ignore the P10C8 code?
Ignoring this code could lead to DEF system malfunctions, reduced power mode, or engine derate, which could limit the vehicle's drivability.
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