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P0546 Chevrolet Code - Exhaust Gas Temperature Sensor 1 Circuit High Voltage

- Code Popularity: 6,289 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
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What are the Possible Causes of the DTC P0546 Chevrolet?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • 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)
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How to Fix the DTC P0546 Chevrolet?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0546 Chevrolet code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

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

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Code P0546 Chevrolet comments

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