Error code

OBD2 P0544

OBD2P0544
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Exhaust Gas Temperature Sensor Circuit.

Severity

moderateCan be driven, but performance may suffer.

Summary

P0544 indicates an issue with the Exhaust Gas Temperature Sensor Circuit in bank 1 of the engine. This sensor measures exhaust gas temperature to help manage fuel injection, timing, and boost pressure.

Symptoms

  • Illuminated Check Engine Light
  • Increased fuel consumption (in diesel vehicles)
  • Reduced boost pressure (in turbocharged cars)

Common Causes

  • Damaged or broken wiring to the EGT sensor
  • Loose or corroded connector on the EGT sensor
  • Soot buildup on the EGT sensor
  • Short-circuited EGT sensor
  • Aftermarket exhaust system without a catalytic converter or DPF filter
  • Large air leak between the exhaust manifold and the EGT sensor

Diagnosis

  1. Inspect wiring and connectors for damage or corrosion.
  2. Check for soot buildup on the sensor.
  3. Verify proper installation of aftermarket exhaust systems.

Fixes

  • Replace faulty EGT sensor— $50 or less (aftermarket part)

FAQ

How do I know if the wiring is damaged?

Inspect for visible damage and check connections for corrosion.

Can I drive with this code?

Yes, but performance issues may occur. It's best to address it soon.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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