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Code

P0544

Exhaust

Exhaust gas temperature sensor circuit malfunction (Bank 1)

The exhaust temperature sensor circuit has a fault.

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Most likely causes

Faulty EGT sensor
Wiring fault
Damaged connector

Symptoms you may notice

Check engine light
Possible regeneration issues on diesels

Checks to run

Measure sensor resistance
Inspect wiring

Tools you may need

Multimeter

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

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