P0545 Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

Definition: The OBD-II code P0545 indicates that the Engine Control Module (ECM) has detected a low voltage signal from the exhaust gas temperature sensor located on bank 2, sensor 1. This sensor is responsible for monitoring the temperature of the exhaust gases to ensure optimal engine performance and emissions control.

p0545 – Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

Typical Severity: Moderate

Common Causes

P0545 – Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

Common causes:

• Faulty exhaust gas temperature sensor
• Wiring or connector issues in the exhaust gas temperature sensor circuit
• Exhaust leaks near the sensor
• Engine running too rich causing low exhaust temperatures

Common Misdiagnosis

OBD2 Code: P0545

Description: Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

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

Common Diagnostic Steps

OBD2 Code: P0545

Description: Exhaust Gas Temperature Sensor Circuit Low Bank 2 Sensor 1

• Inspect the exhaust gas temperature sensor wiring for damage or disconnection.
• Check for corrosion or poor connections at the sensor connector.
• Test the exhaust gas temperature sensor using a multimeter to ensure it is within specifications.
• Verify that there are no exhaust leaks near the sensor that could affect its readings.
• Examine the vehicle’s PCM (Powertrain Control Module) for any updates or known issues related to this code.
• If necessary, replace the faulty exhaust gas temperature sensor with a new one.
• Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.