AutoCodes – GMC – P041E 2018 GMC Sierra

P041E 2018 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Erratic

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: P041E 2018 GMC Sierra indicates Exhaust Gas Recirculation Temperature Sensor 1 Circuit Erratic.
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 181

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 Jun 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P041E 2018 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 has changed to greater than 25Ω in 0.1 s.

OBDII Code P041E 2018 GMC Sierra - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Erratic - AutoCodes.com — P041E 2018 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Circuit Erratic

What does this mean?

What are the Possible Causes of the DTC P041E 2018 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 P041E 2018 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 P041E 2018 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 P041E 2018 GMC Sierra code?

Need more information on how to fix the P041E 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the 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 P041E 2018 GMC Sierra Code

1. What does the OBDII code P041E mean for a 2018 GMC Sierra?

P041E indicates an issue with the Exhaust Gas Recirculation (EGR) Temperature Sensor 1, specifically an erratic signal or circuit problem.

2. What are the common symptoms of code P041E in a 2018 GMC Sierra?

Symptoms may include the check engine light turning on, reduced engine performance, poor fuel efficiency, and possible rough idling.

3. What causes the P041E code to appear on a 2018 GMC Sierra?

Common causes include a faulty EGR temperature sensor, damaged or corroded wiring, loose connections, or a malfunctioning EGR valve.

4. Can I drive my 2018 GMC Sierra with the P041E code active?

While the vehicle may still be drivable, ignoring the code can lead to reduced engine performance, increased emissions, and potential damage to the EGR system.

5. How do I diagnose the P041E code on my 2018 GMC Sierra?

Diagnosis involves using an OBDII scanner, inspecting the EGR temperature sensor and wiring, and checking for loose or corroded connections.

6. How do I fix the P041E code on a 2018 GMC Sierra?

Repairs may include replacing the EGR temperature sensor, repairing damaged wiring, cleaning the EGR valve, or ensuring proper connections in the circuit.

7. How much does it cost to fix the P041E code on a 2018 GMC Sierra?

Costs vary depending on the repair, but EGR temperature sensor replacement typically ranges from $100 to $300, including parts and labor.

8. Can a dirty EGR valve cause the P041E code on a 2018 GMC Sierra?

Yes, a dirty or clogged EGR valve can cause erratic sensor readings and trigger the P041E code.

9. Will clearing the P041E code without repairs fix the problem?

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

10. Is the P041E code covered under warranty for a 2018 GMC Sierra?

It depends on your warranty coverage, but emissions-related components like the EGR system may be covered under the federal emissions warranty. Check with your dealer for details.