P0546 Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

Definition: The P0546 code indicates that the powertrain control module (PCM) has detected a high voltage condition in the exhaust gas temperature sensor circuit for bank 1, sensor 1. This typically means that the sensor is reporting a temperature reading that is higher than expected.

p0546 – Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

Typical Severity: Moderate

Common Causes

p0546 – Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

Common causes of this OBD2 code include:

• Faulty exhaust gas temperature sensor
• Wiring issues in the exhaust gas temperature sensor circuit
• Exhaust leaks near the sensor
• Engine running too rich or lean

 

Common Misdiagnosis

OBD2 Code: P0546

Description: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

Common Misdiagnosis: Replacing the exhaust gas temperature sensor without checking for wiring issues or poor connections.

 

Common Diagnostic Steps

OBD2 Code: P0546

Description: Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor 1

• Verify the code with an OBD2 scanner and clear it to see if it returns.
• Inspect the exhaust gas temperature sensor for any visible damage or disconnection.
• Check the wiring and connectors for corrosion, damage, or loose connections.
• Measure the resistance of the exhaust gas temperature sensor using a multimeter to ensure it is within specifications.
• Test the voltage supply to the sensor from the engine control module (ECM).
• If applicable, check for any software updates or technical service bulletins related to this issue.
• If all tests pass, consider replacing the exhaust gas temperature sensor.