AutoCodes – GMC – P041B 2014 GMC Sierra

P041B 2014 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Performance

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: P041B 2014 GMC Sierra indicates Exhaust Gas Recirculation Temperature Sensor 1 Performance.
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 186

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 P041B 2014 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 has not changed greater than a calibrated amount for greater than a calibrated amount of time following a cold start.

OBDII Code P041B 2014 GMC Sierra - Exhaust Gas Recirculation Temperature Sensor 1 Performance - AutoCodes.com — P041B 2014 GMC Sierra Code - Exhaust Gas Recirculation Temperature Sensor 1 Performance

What does this mean?

What are the Possible Causes of the DTC P041B 2014 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 P041B 2014 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 P041B 2014 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 P041B 2014 GMC Sierra code?

Need more information on how to fix the P041B 2014 GMC Sierra code? Get Access to Factory Service Manuals

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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 P041B 2014 GMC Sierra Code

1. What does code P041B mean on a 2014 GMC Sierra?

Code P041B indicates an issue with the Exhaust Gas Recirculation (EGR) Temperature Sensor 1, typically related to its performance or signal range.

2. What are common symptoms of code P041B on a 2014 GMC Sierra?

Symptoms include an illuminated check engine light, reduced fuel efficiency, rough idling, and potentially poor engine performance.

3. What causes the P041B code to appear?

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

4. Can I drive my 2014 GMC Sierra with a P041B code?

While the vehicle may still be drivable, ignoring the issue can lead to reduced performance, increased emissions, and potential engine damage over time.

5. How do I fix the P041B code on a 2014 GMC Sierra?

Repairs may involve replacing the EGR temperature sensor, repairing damaged wiring, cleaning the EGR valve, or addressing any exhaust flow restrictions.

6. How much does it cost to fix the P041B code?

The repair cost varies but typically ranges from $100-$300, depending on whether the EGR temperature sensor or additional components like wiring need replacing.

7. How do I diagnose the P041B code on my GMC Sierra?

Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting the EGR temperature sensor and wiring, and testing the sensor for proper voltage or resistance.

8. Can a dirty EGR valve cause the P041B code?

Yes, a clogged or dirty EGR valve can disrupt exhaust gas flow and trigger the P041B code.

9. What tools are needed to repair a P041B code?

Basic tools include an OBDII scanner, multimeter for testing electrical connections, and standard hand tools to access and replace the EGR temperature sensor.

10. Does the P041B code affect emissions?

Yes, a malfunctioning EGR system can increase NOx emissions, potentially causing the vehicle to fail an emissions test.