AutoCodes – GMC – P0545 2014 GMC Sierra

P0545 2014 GMC Sierra Code - Exhaust Gas Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 1, Exhaust Gas Temperature Sensor 1 harness is open or shorted, Exhaust Gas Temperature Sensor 1 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0545 2014 GMC Sierra indicates Exhaust Gas Temperature Sensor 1 Circuit Low Voltage.
Common causes: Common causes include Faulty Exhaust Gas Temperature Sensor (EGTS) 1, Exhaust Gas Temperature Sensor 1 harness is open or shorted, Exhaust Gas Temperature Sensor 1 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 234

How popular is this code, among other codes? Low

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 03, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0545 2014 GMC Sierra Description

The Exhaust Gas Temperature sensors (EGTS) are variable resistors that measure the temperature of the exhaust gas. Exhaust temperature sensor 1 is the first exhaust temperature sensor in the exhaust system, the following exhaust temperature sensors are counted upward from the engine outlet to the exhaust system end. The Engine Control Module (ECM) supplies 5 V to the exhaust gas temperature signal circuit and supplies a ground to the low reference circuit. The exhaust gas temperature sensor temperature information is used by the ECM during the exhaust gas particulate filter cleaning process. The Diagnostic Trouble Code (DTC) will ve set when the ECM detects that the exhaust gas temperature sensor is less than 158 Ω for greater than 2 s.

OBDII Code P0545 2014 GMC Sierra - Exhaust Gas Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P0545 2014 GMC Sierra Code - Exhaust Gas Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0545 2014 GMC Sierra?

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

How to Fix the DTC P0545 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 does this mean?

Code Tech Notes

After starting the engine, the exhaust gas temperature sensor temperature should rise steadily, then stabilize after the engine reaches operating temperature. Exhaust gas temperature sensors may fail intermittently while operating under extreme temperatures. Review the Freeze Frame/Failure Records to verify the failure criteria.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0545 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 P0545 2014 GMC Sierra code?

Need more information on how to fix the P0545 2014 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 P0545 2014 GMC Sierra Code

1. What are the common symptoms of OBDII code P0545 in a 2014 GMC Sierra?

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P0545 Exhaust Gas Temperature Sensor 1 Circuit Low Voltage indicate?

- This code indicates that the exhaust gas temperature sensor 1 is reporting a low voltage condition to the engine control module.

3. What are the possible causes of OBDII code P0545 in a 2014 GMC Sierra?

- Possible causes include a faulty exhaust gas temperature sensor, damaged wiring or connectors, exhaust leaks, or a problem with the engine control module.

4. How can I diagnose the cause of OBDII code P0545 in my 2014 GMC Sierra?

- A thorough diagnostic process involves checking the sensor's wiring and connectors for damage, inspecting the exhaust system for leaks, and testing the sensor's functionality using a multimeter.

5. Can I continue driving my 2014 GMC Sierra with OBDII code P0545 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to further engine damage and potential safety hazards.

6. How can I repair OBDII code P0545 in my 2014 GMC Sierra?

- Repair options include replacing the faulty exhaust gas temperature sensor, repairing any damaged wiring or connectors, fixing exhaust leaks, or reprogramming the engine control module.

7. Is it possible to reset the OBDII code P0545 in a 2014 GMC Sierra without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely reappear if the underlying issue is not addressed.

8. Are there any preventive measures to avoid OBDII code P0545 in my 2014 GMC Sierra?

- Regular maintenance, such as inspecting the exhaust system for leaks and ensuring proper sensor function during tune-ups, can help prevent this code from occurring.

9. Can a DIY enthusiast repair OBDII code P0545 in a 2014 GMC Sierra?

- Depending on your skill level and access to tools, DIY repair of this code is possible, but professional diagnosis and repair may be more effective in resolving the issue.

10. How much does it typically cost to repair OBDII code P0545 in a 2014 GMC Sierra?

- Repair costs can vary based on the exact cause of the issue, but expect to pay anywhere from $100 to $500 for parts and labor, with sensor replacement being a common repair.