Our certified mechanics come to you · Get a fair and transparent estimate upfront
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.
P0544 Exhaust Gas Temperature Sensor Circuit Bank 1 Sensor 1
The P0544 code means that the powertrain control module (PCM) has detected a problem with the exhaust gas temperature sensor circuit.
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.
This code may be due to:
The P0544 code typically has no symptoms other than the Check Engine Light illuminating on the dash.
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.
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.
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.
The common repairs used for the P0544 code are:
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.
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 1-800-701-6230.