P0546 - Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor 1)

The ECM detected an exhaust gas temperature sensor low fault on bank 1 sensor 1.

Code Overview

The ECM detected an exhaust gas temperature sensor low fault on bank 1 sensor 1.

Common Causes

• Failed exhaust gas temperature sensor
• Damaged wiring or connector
• Heat-related harness damage

Diagnostic Steps

1. Inspect the sensor connector and wiring near the exhaust
2. Compare temperature data to operating conditions
3. Check for heat damage or intermittent signal loss

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.