P0544 - Exhaust Gas Temperature Sensor Circuit Circuit Malfunction (Bank 1 Sensor 1)

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

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Common Next Steps

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Related Inspection

Code Overview

The ECM detected an exhaust gas temperature sensor circuit malfunction 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

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Related OBD Codes

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Next Steps

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