P0544 code — how to fix error fast

Among engine-related OBD2 codes, the P0544 code can appear pretty often, especially in diesel-powered cars. If you aren’t familiar with this code, it’s related to the EGR valve, but you’ll need to take a closer look at the P0544 code meaning to fix it.

That’s what this guide is here for, as we’ll do our best to guide you through the P0544 code’s causes, diagnostic methods you can apply, and possible solutions.

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What does the P0544 code mean?

The P0544 code is a diagnostic trouble code that indicates a fault in the EGR system. The EGR system is responsible for reducing the amount of nitrogen oxides (NOx) emitted by the engine.

This code specifically relates to the EGR temperature sensor circuit, which is responsible for monitoring the temperature of the EGR system.

When the EGR temperature sensor circuit fails, it can cause a variety of symptoms in your car, including reduced fuel efficiency, decreased engine performance, and increased emissions. If left untreated, the P0544 code can cause serious damage to your car’s engine and emissions system.

What causes the P0544 code?

Several factors can cause the P0544 code to appear. Some common causes include a faulty EGR temperature sensor, damaged wiring or connectors in the EGR temperature sensor circuit, or a malfunctioning powertrain control module (PCM).

Faulty EGR temperature sensor

The EGR temperature sensor can fail due to wear and tear or damage. When the sensor fails, it can cause the PCM to detect a fault in the EGR temperature sensor circuit, triggering the P0544 code.

Damaged wiring or connectors in the EGR temperature sensor circuit

The wiring or connectors in the EGR temperature sensor circuit can become damaged due to exposure to heat or vibration. When this happens, it can cause a short circuit or an open circuit and these issues often activate the code.

Malfunctioning powertrain control module (PCM)

The PCM is responsible for monitoring and controlling the EGR system. If the PCM is malfunctioning, it can cause the EGR temperature sensor circuit to fail.

Which car models does the P0544 code affect the most?

The P0544 code can affect a variety of car models, but it is most commonly found in vehicles manufactured by Ford, Chrysler, and Dodge. This is because these car manufacturers use EGR systems that are more prone to failure than other car manufacturers, but here’s a list with commonly affected cars:

• BMW 3 Series: This code has been reported in various BMW models including the 3 Series due to their sophisticated engine monitoring systems and complex wiring.
• Chevy Cruze: These small Chevy models are known for their affordability and fuel efficiency. However, they have also had a history of electrical issues, including the P0544 code related to the engine oil temperature sensor circuit.
• Dodge Dart: Just like the Cruze, the Dart model has also been reported to experience issues leading to the mentioned OBD2 code.

How to diagnose the P0544 code

Diagnosing the P0544 code can be a complex process. However, it is important to diagnose the code correctly to ensure that the right repairs are made. Here are the steps to diagnose the P0544 code:

Check the EGR temperature sensor

The first step in diagnosing the P0544 code is to check the EGR temperature sensor for damage or wear. This can be done by using a multimeter to test the resistance of the sensor. If the resistance is not within the manufacturer’s specifications, the sensor is faulty and needs to be replaced.

Check the wiring

The next step is to check the wiring and connectors in the EGR temperature sensor circuit. This can be done by using a wiring diagram to identify the wires and connectors and then checking them for damage or wear. If any wiring or connectors are damaged, they need to be repaired or replaced.

Inspect the PCM’s performance

The final step is to check the PCM for malfunctions. This can be done by using a scan tool to read the PCM’s diagnostic trouble codes. If the PCM is malfunctioning, it needs to be replaced.

How to fix the P0544 code

Once the cause of the P0544 code has been identified, it can be fixed. Here are some of the most effective solutions depending on the reason that triggered the code:

Replace the EGR temperature sensor

If the EGR temperature sensor is faulty, it needs to be replaced. This can be done by disconnecting the sensor, removing it from the EGR system, and then installing a new sensor in its place.

Repair damaged wiring

Splicing in new wiring or connectors or replacing the damaged components can help solve the issues with this code, and this repair is one of the most affordable solutions for the code.

Replace the PCM

Replacing the PCM should come in last since this can be a more expensive fix and it could get pretty bad if you have to pay over $1000 for a computer replacement.

How to prevent the P0544 code

Preventing the P0544 code from occurring can be done by following routine maintenance procedures. Here are some tips to prevent the code:

• Replace the EGR system components
• Use high-quality replacement parts
• Perform regular tune-ups

Regular maintenance can help to keep your car’s systems running smoothly and can prevent issues from occurring.

Our take

As you can see from this guide, the P0544 code can be a frustrating issue for car owners. However, by understanding the code, its causes, and its fixes, you can take steps to prevent it from occurring in the future.

By following our lead on the code’s trigger causes and possible solutions, you can avoid having to pay for expensive repairs and keep your vehicle safe from the code’s re-appearance.