AutoCodes – Chevrolet – P0546 2017 Chevrolet Silverado

P0546 2017 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 2017 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 329

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 2017 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 2017 Chevrolet Silverado - Exhaust Gas Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0546 2017 Chevrolet Silverado Code - Exhaust Gas Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0546 2017 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 2017 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 2017 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 2017 Chevrolet Silverado code?

Need more information on how to fix the P0546 2017 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 2017 Chevrolet Silverado Code

1. What does the OBDII code P0546 mean for a 2017 Chevrolet Silverado?

P0546 indicates a high voltage issue in the Exhaust Gas Temperature (EGT) Sensor 1 circuit, meaning the sensor is detecting higher-than-expected temperatures or thereâ€™s an electrical problem.

2. What are the common symptoms of code P0546 in a 2017 Chevrolet Silverado?

Common symptoms include the check engine light turning on, reduced engine performance, poor fuel efficiency, and potentially the engine going into limp mode.

3. What causes the P0546 code to appear on a 2017 Chevrolet Silverado?

This code can be caused by a faulty EGT sensor, damaged wiring or connectors in the sensor circuit, excessive exhaust temperatures, or a malfunctioning PCM (Powertrain Control Module).

4. Can I drive my 2017 Chevrolet Silverado with a P0546 code?

While the truck may still be drivable, itâ€™s not recommended as it could lead to reduced performance, increased emissions, or damage to the exhaust or engine components.

5. How do I fix the P0546 code on a 2017 Chevrolet Silverado?

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

6. How do I diagnose the P0546 code on my 2017 Chevrolet Silverado?

Start by scanning the vehicle with an OBDII tool, inspecting the EGT sensor and its wiring for damage, checking for exhaust leaks, and testing the sensorâ€™s resistance and voltage output.

7. Where is Exhaust Gas Temperature Sensor 1 located on a 2017 Chevrolet Silverado?

Sensor 1 is typically located before the diesel particulate filter (DPF) or catalytic converter in the exhaust system.

8. What tools are needed to repair the P0546 code on a 2017 Chevrolet Silverado?

You may need an OBDII scanner, multimeter, socket set, and possibly a replacement EGT sensor, depending on the diagnosis.

9. How much does it cost to fix the P0546 code on a 2017 Chevrolet Silverado?

Repair costs can range from $100 to $300, depending on whether the issue is a sensor replacement, wiring repair, or more extensive diagnostic work.

10. Can a faulty EGT sensor cause engine damage in a 2017 Chevrolet Silverado?

Yes, a faulty EGT sensor can lead to incorrect exhaust temperature readings, which may result in overheating or damage to the exhaust system and engine over time.