Suboptimal Fuel Efficiency in Four-Cylinder Front-Wheel Drive Camry

[Lovelyas]

We recently purchased a 2023 Camry XLE (4-cylinder, front-wheel drive), and the fuel efficiency is far lower than claimed. We are achieving 32 miles per gallon on the highway and 19-23 in urban driving, compared to the quoted figures of 27/38. I am really apprehensive on this matter, as the mileage and economy of the V6/SUV were primary factors in our decision to select a 4-cylinder front-wheel-drive model. The tires are little larger than specified (235/45 R19 instead of R18), but I have read that this should have a minimal impact on fuel efficiency. I possess mechanical aptitude and am aware of the necessity to inspect fundamental components (oil, air filter, MAF sensor, diagnostic codes, tyre pressure); no apparent faults are present. The dealer replaced the oil and installed new tires prior to the sale. All counsel is appreciated. I do not observe any fuel efficiency concerns about these vehicles when I conduct online research. I am concerned that we have purchased a defective product.

[Mastervest]

Are you utilising the vehicle's system for the MPG figures or employing traditional calculations?
Do you possess a scanner capable of reading live data?
Understanding the fuel trims, for instance, could be advantageous.

In addition to the fuel efficiency, how does it perform in terms of operation and handling?
What is the mileage, and are you aware of the maintenance history of the vehicle?
I assume the Check Engine Light is off, signifying that no diagnostic codes are present?

[Lovelyas]

I utilised the vehicle's trip computer for monitoring miles per gallon. I have not engaged in traditional mathematics, but you are correct; I ought to do so.
My scanner is rudimentary, but I am in the process of updating.

It produces an unpleasant noise upon cold start, characterised by a rhythmic knock, possibly originating from a specific cylinder, and I believe I can detect a subtle rhythmic sound or knock during warm idle. However, I am unfamiliar with the vehicle and cannot ascertain if it is its typical sound. Ought I should publish or share a video?
We have possessed it for merely 10 days; however, it appears to operate adequately, save from the knock, which may not necessarily be problematic. The driver's side visor detached, but it is easily repairable.
43,000 miles. Two proprietors. Delivered to the dealership for routine maintenance.
No active or pending codes exist.


Thank you for your response!

[engrol]

If a code and knock were present, I would assume a potential timing issue that the ECM cannot adequately adjust the air/fuel ratio for, possibly indicating a faulty knock sensor. However, that remains mere conjecture at this juncture.
I am considering resetting the ECM to enable it to recalibrate based on your driving behaviour.


To reset the ECM on a 2023 Camry, detach the battery for a minimum of 10 minutes, then reattach it. Upon reconnection, set the ignition to the "on" position for 1-2 minutes, initiate the engine, allow it to idle for approximately 10 minutes, and thereafter execute a drive cycle encompassing both city and highway speeds to enable the vehicle to recalibrate its parameters.

[engrol]

https://www.google.com/search?q=ECM+(Engine+Control+Module)&client=safari&sca_esv=92debb9001157326&channel=mac_bm&source=hp&ei=vQABafXyAav1kPIPpMqOkQ8&iflsig=AOw8s4IAAAAAaQEOzZtQQQW1YhcC2kZX9hTEKkDuj7LL&oq=2023+camry%2C+how+do+I+reset+the+ecm+and+do+a+rel&gs_lp=Egdnd3Mtd2l6Ii8yMDIzIGNhbXJ5LCBob3cgZG8gSSByZXNldCB0aGUgZWNtIGFuZCBkbyBhIHJlbCoCCAAyBRAhGKABMgUQIRigATIFECEYoAEyBRAhGKABMgUQIRigAUiTmQFQAFjVenAAeACQAQCYAW-gAaweqgEENDMuNLgBAcgBAPgBAZgCL6ACzSDCAgsQABiABBiKBRiRAsICDhAuGIAEGLEDGMcBGNEDwgIOEAAYgAQYigUYsQMYgwHCAggQLhiABBixA8ICCxAAGIAEGLEDGIMBwgILEC4YgAQYsQMYgwHCAg4QLhiABBiKBRixAxiDAcICBRAAGIAEwgIKEC4YgAQYigUYQ8ICCBAAGIAEGLEDwgIKEAAYgAQYigUYQ8ICDRAuGIAEGIoFGEMYsQPCAgQQABgDwgIIEC4YsQMYgATCAgUQLhiABMICBxAAGIAEGArCAgYQABgWGB7CAgsQABiABBiKBRiGA8ICCBAAGIkFGKIEwgIFEAAY7wXCAggQABiABBiiBMICBRAhGJ8FwgIFECEYqwKYAwCSBwQ0MS42oAfQ8AKyBwQ0MS42uAfNIMIHCTAuMTAuMzYuMcgHuwE&sclient=gws-wiz&mstk=AUtExfAqathgzG1Xxtms_zVKmWYsF57GP-4Uw0sASgQP7NdcvXTv82qgc-hHMwn2FJTktR3YQC2uWhLYdZWpoVS8uThkGRbwWhJ04cHBJ4JmundhdXRgYAZ4aXahQR67jFk7N5A&csui=3&ved=2ahUKEwi8ocv2uMeQAxWYiI4IHdXIFekQgK4QegQIARAB

[Lovelyas]

A participant in the new member sticky indicated that the engines are somewhat noisy and that what I am characterising as a "knock" is probably only a standard "tick". I am currently performing an ECM reset and relearn, will manually compute the mileage, and will apply a fuel system cleaning. I will respond with the results. Excellent suggestions, thank you!