P0544 Code: Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1

The powertrain control module (PCM) monitors the readings from the exhaust gas temperature (EGT) sensor to initiate the diesel particulate filter (DPF) regeneration process. There are usually two EGT sensors in light-duty diesel vehicles that monitor the exhaust gas once it enters and exits the DPF. If the PCM detects a problem with one of the EGT sensors, on-board diagnostics (OBD) will log a P0544 code.

What Does the P0544 Code Mean?

Diagnostic trouble code (DTC) P0544 stands for “Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1.”

The temperature inside the DPF increases whenever it fills up with soot. As soon as the EGT sensors send a signal to the PCM, the regeneration process begins. This process is accomplished by increasing the exhaust gas temperature.

If the sensors fail to monitor the exhaust gas temperature, the DPF can melt or crack (too high) or result in an incomplete soot-burning process.

Note: The definition of code P0544 might be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Common Causes of the P0544 Code?

• EGT sensor failure
• Wiring issues
• Exhaust gas recirculation (EGR) valve failure
• Fuel injector failure
• Powertrain control module failure

What are the Common Symptoms of the P0544 Code?

• Illuminated check engine light
• Decreased engine performance
• Vehicle stuck in a derated or “limp” mode

How to Diagnose the P0544 Code

DTC P0544 is a generic powertrain code that can be logged in vehicles with an OBD-II system. However, keep in mind that the steps for diagnosis and repair can vary, depending on vehicle specifications.

Diagnosing this kind of trouble code might require you to use a scan tool and inspect the affected system for signs of damage. If these tasks are too complicated for you, you can always seek the help of a certified technician. Otherwise, you can go ahead and do the job yourself.

To help you out, here’s a short clip showing what the process might involve.

How to Fix the P0544 Code

Attempting to fix a P0544 code can be frustrating and confusing, especially without the right tools and automotive know-how. If done incorrectly, it can even lead to more problems and expensive repair costs. If you think you lack the necessary skills and advanced technical knowledge to resolve this code, it’s best to bring your vehicle to the nearest auto repair shop and have a trained professional work on it instead.

If you’re determined to clear this code yourself, make sure to review your vehicle’s repair manual beforehand. Guides like those from Chilton or an ALLDATA subscription contain vehicle-specific repair information, which will come in handy when fixing a P0544 code.

Where to Get a New EGT Sensor to Resolve Trouble Code P0544

Driving a vehicle that shows signs of reduced engine performance can be troublesome. Unfortunately, this may happen after your vehicle logs a P0544 trouble code.

Here at CarParts.com, we can help you clear this code with our selection of OE-grade exhaust gas temperature (EGT) sensors. Carefully handpicked by a team of industry professionals, our EGT sensors are guaranteed to last long.

Find the right EGT sensor for your ride by entering its year, make, and model into our vehicle selector. This will narrow down the catalog to compatible parts for your daily driver. You can also use the search filters to find a sensor according to your preferred brand, price range, quantity, and more.

Shop for much-needed repairs without going over your budget. All our products come with  low-price and lifetime replacement guarantees, helping you get the best value for your money. Place your order now, and get it delivered straight to your doorstep in as fast as two business days.

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