AutoCodes – Chevrolet – P0546 2016 Chevrolet Silverado

P0546 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 1 Circuit High 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: P0546 2016 Chevrolet Silverado indicates Exhaust Gas Temperature Sensor 1 Circuit High 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 257

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 P0546 2016 Chevrolet Silverado 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 greater than 900 Ω for greater than 2 s.

OBDII Code P0546 2016 Chevrolet Silverado - Exhaust Gas Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0546 2016 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0546 2016 Chevrolet Silverado?

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 P0546 2016 Chevrolet Silverado?

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 P0546 2016 Chevrolet Silverado 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 P0546 2016 Chevrolet Silverado code?

Need more information on how to fix the P0546 2016 Chevrolet Silverado 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 P0546 2016 Chevrolet Silverado Code

1. What does the OBDII code P0546 mean on a 2016 Chevrolet Silverado?

P0546 indicates a high voltage issue in the Exhaust Gas Temperature (EGT) Sensor 1 circuit, which monitors exhaust temperatures to ensure proper emissions control.

2. What are the common symptoms of code P0546 in a 2016 Chevrolet Silverado?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, potential engine performance issues, or the vehicle entering limp mode.

3. What causes code P0546 to appear in a 2016 Chevrolet Silverado?

Common causes include a faulty EGT sensor, damaged wiring or connectors, excessive exhaust temperatures, or issues with the engine control module (ECM).

4. How do I diagnose the P0546 code on my 2016 Chevrolet Silverado?

Start by using an OBDII scanner to confirm the code, then inspect the EGT sensor, its wiring, and connectors for damage or corrosion. Use a multimeter to check for proper voltage signals.

5. Can I drive my 2016 Chevrolet Silverado with code P0546?

While it may be possible to drive, it is not recommended as it can lead to reduced engine performance, increased emissions, and potential damage to the exhaust system.

6. How do I fix the P0546 code on a 2016 Chevrolet Silverado?

Repairs may include replacing the faulty EGT sensor, repairing or replacing damaged wiring or connectors, or reprogramming/updating the ECM if necessary.

7. How much does it cost to repair a P0546 code on a 2016 Chevrolet Silverado?

Repair costs vary depending on the issue, but replacing an EGT sensor typically costs between $100 and $300, including parts and labor.

8. Can a dirty exhaust system cause the P0546 code in a 2016 Chevrolet Silverado?

Yes, excessive soot or debris in the exhaust system can cause the EGT sensor to malfunction, leading to the code.

9. How can I prevent the P0546 code from occurring in my 2016 Chevrolet Silverado?

Regular maintenance of the exhaust system, including cleaning and inspecting sensors and wiring, can help prevent this code.

10. Is the P0546 code covered under warranty for a 2016 Chevrolet Silverado?

Depending on your vehicleâ€™s warranty and mileage, this issue could be covered under the emissions or powertrain warranty. Check with your dealership for confirmation.