What does P0544 mean?
Exhaust gas temperature (EGT) sensors watch exhaust temperature around the turbo, catalyst and DPF, especially during regeneration.
The computer has detected an electrical fault in the temperature sensor circuit.
Codes are a starting point. They tell you which test failed, not which part to replace. Check for other stored codes and fix those in a sensible order.
Symptoms
- Check engine light
- DPF regeneration disabled
- Possible reduced power
Common causes
- Open or shorted wiring
- Corroded connector
- Failed sensor
How to diagnose P0544
- Check live data for a stuck or extreme reading.
- Inspect the connector and harness.
- Test sensor resistance against spec.
- Compare all EGT readings after a cold soak; they should be close to air temperature.
- Check sensor resistance and wiring.
How to fix it
- Replace the EGT sensor
- Repair wiring
Estimated repair cost
Likely repairs for P0544 run from about $100 to $350, depending on the cause.
| Repair | Typical range (parts + labor) |
|---|---|
| Diagnostic fee (scan + testing) | $100 - $200 |
| Exhaust gas temperature sensor | $100 - $350 |
These are rough US estimates for an independent shop in 2026, based on typical parts prices and standard labor times. Dealers, big trucks, luxury brands and high-cost areas often run higher. They are not quotes. Use the repair cost estimator to adjust for your vehicle.
How serious is P0544?
Moderate severity
Drivable short term, but regens may be blocked and the DPF can load up.
P0544 FAQ
What does P0544 mean?
P0544 stands for "Exhaust Gas Temperature Sensor Circuit (Bank 1 Sensor 1)". Exhaust gas temperature (EGT) sensors watch exhaust temperature around the turbo, catalyst and DPF, especially during regeneration.
Can I drive with a P0544 code?
Drivable short term, but regens may be blocked and the DPF can load up.
How much does it cost to fix P0544?
It depends on the cause. The likely repairs for P0544 range from about $100 to $350 at an independent shop in the US, plus a diagnostic fee of roughly $100-$200. These are rough estimates; dealer prices and some vehicles run higher.
What is the most common cause of P0544?
The most common causes are: open or shorted wiring; corroded connector; failed sensor.