P0544 Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0544 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0544 code

P0544 is a diagnostic trouble code (DTC) for "Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0544 DIAGNOSTIC Get a fair and transparent estimate upfront

P0544 Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1

Diagnostic Trouble Code (DTC): P0544

P0544 code definition

The P0544 code means that the powertrain control module (PCM) has detected a problem with the exhaust gas temperature sensor circuit.

What the P0544 code means

The P0544 code is the generic OBD-II code triggered when the exhaust gas temperature sensor voltage readings exceed the manufacturer's programmed limitations, triggering the code and/or the Check Engine Light to illuminate.

What causes the P0544 code?

This code may be due to:

  • Wiring, connectors or terminals that have become loose, broken, corroded or even burned
  • Sensor shorting out internally or to its ground
  • A defective sensor
  • The use of an aftermarket exhaust system, usually off road systems, that cause pressure issues
  • An extreme leak, upstream from the sensor, in the exhaust system

What are the symptoms of the P0544 code?

The P0544 code typically has no symptoms other than the Check Engine Light illuminating on the dash.

How does a mechanic diagnose the P0544 code?

Diagnosis of a P0544 code begins with the OBD-II scanner. The mechanic will look at the freeze frame data to determine precisely when the code was set before resetting the codes and doing a road test. This will reveal if the code returns, and if so, further diagnosis is needed.

The first step is to inspect all exhaust gas temperature sensor and all of its circuitry is needed. If this wiring is in working order, the sensor should be disconnected and a digital ohmmeter used to check the resistance of the exhaust gas temperature sensor. It must meet manufacturer specs, and if not, it will need replacement. If within the appropriate levels, the sensor must be manually tested.

Should the sensor fail to adjust smoothly during a manual test, it must be replaced. If it is in working order, it may be that there is a PCM failure, though this is rare.

Common mistakes when diagnosing the P0544 code

The main mistake made during a diagnosis of the P0544 code is for the technician to believe that the oxygen sensor is the exhaust gas temperature sensor or that they are integrated into one another as one unit. This is incorrect and replacing the oxygen sensor does not clear the code or solve the issue.

How serious is the P0544 code?

The P0544 does not interfere with vehicle operation or prevent safe operation of the car, but it can lead to voltage and electrical issues as the PCM relies on the sensor to provide optimal functions. It will adjust the timing in the ignition and the air to fuel ratio that protects the vehicle's catalytic converter.

What repairs can fix the P0544 code?

The common repairs used for the P0544 code are:

  • Verifying the code with the use of the code scanner, and then resetting the codes before doing a road test. Should the P0544 code come back, it is necessary to do an inspection of the exhaust gas temperature sensor circuitry.
  • If this is in good condition, especially around the areas closest to the hottest exhaust components, proceed with the diagnostics. If there are signs of damage, burning, corrosion, and anything that needs repair, do the repairs and retest with the scanner.
  • If there is no damage, disconnect the sensor connector and physically remove it. Use your ohmmeter to gauge the resistance of the sensor, looking for it to fall within the manufacturer's specs.
  • If it fails to meet the specs, replace the sensor. If it meets the standards, manually test it with a heat gun, monitoring the resistance on the ohmmeter to gauge if it decreases accordingly. If not, replace the sensor.
  • Should these repairs fail to detect a problem, check the voltage at the sensor's connector, with the vehicle ignition turned to the "on" position. If this shows adequate voltage, it is a PCM issue.

Additional comments for consideration regarding the P0544 code

PCM failure is a rare event, but it can be the cause behind this code and must be addressed if the diagnostic and repair steps fail to eliminate the code.

Need help with a P0544 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6220.

trouble codes
P0544
Check Engine Light

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0544 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

4,810

Rating Summary
4,424
187
47
28
124
4,424
187
47
28
124

Joel

19 years of experience
741 reviews
Joel
19 years of experience
Acura RL - Check Engine Light is on - Jacksonville, Florida
very knowledgeable and precise. able to fix electrical issues in my car. Right on time for the appointment.

Christopher

15 years of experience
41 reviews
Christopher
15 years of experience
Honda Accord - Check Engine Light is on - Fairburn, Georgia
Christopher was excellent! He explained everything in detail to make sure I understood. He was professional and provided me with the next course of actions to resolve my care issues. I'm glad he was sent to service my car.

Alexander

18 years of experience
58 reviews
Alexander
18 years of experience
Saab 9-7x - Check Engine Light is on - Kissimmee, Florida
He was very friendly and very helpful . I felt like it was being around a close friend , also gave me so very good advice on my car & future advice about it . Highly recommend mechanic, would use his services again .

Matthew

31 years of experience
639 reviews
Matthew
31 years of experience
Jeep Patriot - Check Engine Light is on - Norfolk, Virginia
Matthew was on time which was a relief, he is very knowledgeable and was easy to understand what was wrong and what was being done. I am recommending to friends and family due to the great experience Matthew gave me. Extremely professional 10/10

More related articles

Related questions

Check Engine Light is flashing. My truck only starts after 5 seconds - 2006 Dodge Ram 1500

Hi and thanks for contacting YourMechanic. When the Check Engine Light flashes, it means that there is an intermittent problem making the light flash on and off. When the light flashes, it is best to pull off the road and...

Car hesitates while accelerating, check engine light on all the time

The Check Engine Light going on and off is most likely caused by an engine misfire. The intake manifold could be leaking vacuum when it is cold, and sealing up when the vehicle warms up. The engine running poorly...

I took my car to Advance Auto and them do a check engine light diagnostic test and the code is C0245

Hello. Thanks for writing in. You may have two separate issues going on at once. The speed sensor code is likely due to sensor failure, or a bad connection. In the case of a bad connection, a good visual inspection...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com