AutoCodesGMC – P041C 2017 GMC Sierra

P041C 2017 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1, Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 1 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
P041C 2017 GMC Sierra indicates Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1, Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted, Exhaust Gas Recirculation Temperature Sensor 1 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 147
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 20, 2022
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Code P041C 2017 GMC Sierra Description

The Exhaust Gas Recirculation (EGR) temperature sensors are variable resistors that measure the temperature of the exhaust gas at the inlet and outlet of the EGR cooler. The Engine Control Module (ECM) supplies 5 volts to the EGR temperature sensor signal circuit and a ground for the low reference circuit. When the EGR temperature sensor is cold, the sensor resistance is high. When the EGR temperature increases, the sensor resistance decreases. The ECM detects a higher voltage on the EGR temperature signal circuit with high sensor resistance. With lower sensor resistance, the ECM detects a lower voltage on the EGR temperature signal circuit. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the EGR temperature sensor resistance is less than 147 Ω for greater than 5 s.
OBDII Code P041C 2017 GMC Sierra - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com
P041C 2017 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Low Voltage

What are the Possible Causes of the DTC P041C 2017 GMC Sierra?

  • Faulty Exhaust Gas Recirculation (EGR) Temperature Sensor 1
  • Exhaust Gas Recirculation Temperature Sensor 1 harness is open or shorted
  • Exhaust Gas Recirculation Temperature Sensor 1 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P041C 2017 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 P041C 2017 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 P041C 2017 GMC Sierra code?

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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 P041C 2017 GMC Sierra Code

1. What does the OBDII code P041C mean on a 2017 GMC Sierra?

P041C indicates a problem with the Exhaust Gas Recirculation (EGR) Temperature Sensor 1 Circuit, specifically reporting low voltage.

2. What are the common symptoms of the P041C code?

Symptoms may include an illuminated check engine light, reduced engine performance, increased emissions, and in some cases, rough idling.

3. What causes the P041C code to appear on a 2017 GMC Sierra?

Common causes include a faulty EGR temperature sensor, damaged wiring or connectors in the EGR sensor circuit, or a malfunctioning EGR system.

4. How can I diagnose the P041C code?

Start by using an OBDII scanner to confirm the code, then inspect the EGR temperature sensor, wiring, and connectors for damage or corrosion.

5. Can I drive my 2017 GMC Sierra with the P041C code?

It’s possible to drive with this code, but it’s not recommended due to potential increased emissions and reduced engine performance.

6. How do I fix the P041C code on my 2017 GMC Sierra?

Common fixes include replacing the EGR temperature sensor, repairing or replacing damaged wiring, and cleaning or servicing the EGR system.

7. How much does it cost to repair the P041C code?

The cost can vary, but replacing the EGR temperature sensor typically ranges from $100 to $300, including parts and labor.

8. Can a clogged EGR valve cause the P041C code?

While a clogged EGR valve is not the direct cause, it can affect the overall EGR system's performance, potentially contributing to sensor issues.

9. How do I prevent the P041C code from recurring?

Regular maintenance, such as cleaning the EGR valve and inspecting wiring and connectors, can help prevent this code from recurring.

10. Will clearing the code with a scanner fix the P041C issue?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be repaired to prevent the code from returning.

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