What is YOLOv8?

YOLOv8 is a computer vision model architecture developed by Ultralytics, the creators of YOLOv5. You can deploy YOLOv8 models on a wide range of devices, including NVIDIA Jetson, NVIDIA GPUs, and macOS systems with Roboflow Inference, an open source Python package for running vision models.

What is YOLOv8?

YOLOv8 is a computer vision model architecture developed by Ultralytics, the creators of YOLOv5. You can deploy YOLOv8 models on a wide range of devices, including NVIDIA Jetson, NVIDIA GPUs, and macOS systems with Roboflow Inference, an open source Python package for running vision models.

Get Started Using YOLOv8

Roboflow is the fastest way to get YOLOv8 running in production. Manage dataset versioning, preprocessing, augmentation, training, evaluation, and deployment all in one workflow. Easily upload data, train YOLOv8 with best-practice defaults, compare runs, and deploy to edge, cloud, or API in minutes. Try a YOLOv8 model on Roboflow with this workflow:

Will Carmax Buy A Car With Check Engine Light On -

: For expensive repairs (like a transmission or engine timing issue), it is rarely cost-effective to fix the car before selling it to CarMax. You will likely spend more on the repair than you would gain in the increased offer. What to Bring to Your Appraisal

: If you have a diagnostic report from a mechanic explaining why the light is on, sharing this can sometimes help the appraiser provide a more accurate (and potentially higher) value than a "worst-case scenario" estimate.

: Proof of ownership is required for a formal offer.

: If a $20 sensor or a new gas cap fixes the light, it is often worth doing. A dashboard free of warnings creates a better first impression and may lead to a higher "retail-ready" offer.

: If the check engine light is caused by a major mechanical failure, CarMax may choose not to sell the car on their front lot (which is reserved for "CarMax Certified" vehicles). Instead, they will sell it at an in-house dealer auction . This usually results in a lower offer than a car in pristine condition, as it is being valued for the wholesale market. Should You Fix It Before Selling?

They provide offers for most vehicles regardless of their mechanical condition, provided they can be safely test-driven on their lot. The CarMax Appraisal Process with a Check Engine Light

: The appraisal team will factor in the potential cost of repairs. Since a check engine light can indicate anything from a loose gas cap to a failing catalytic converter, CarMax typically subtracts a estimated repair value from their offer to account for the risk and parts.

Deciding whether to address the light yourself depends on the cause:

: For expensive repairs (like a transmission or engine timing issue), it is rarely cost-effective to fix the car before selling it to CarMax. You will likely spend more on the repair than you would gain in the increased offer. What to Bring to Your Appraisal

: If you have a diagnostic report from a mechanic explaining why the light is on, sharing this can sometimes help the appraiser provide a more accurate (and potentially higher) value than a "worst-case scenario" estimate.

: Proof of ownership is required for a formal offer.

: If a $20 sensor or a new gas cap fixes the light, it is often worth doing. A dashboard free of warnings creates a better first impression and may lead to a higher "retail-ready" offer.

: If the check engine light is caused by a major mechanical failure, CarMax may choose not to sell the car on their front lot (which is reserved for "CarMax Certified" vehicles). Instead, they will sell it at an in-house dealer auction . This usually results in a lower offer than a car in pristine condition, as it is being valued for the wholesale market. Should You Fix It Before Selling?

They provide offers for most vehicles regardless of their mechanical condition, provided they can be safely test-driven on their lot. The CarMax Appraisal Process with a Check Engine Light

: The appraisal team will factor in the potential cost of repairs. Since a check engine light can indicate anything from a loose gas cap to a failing catalytic converter, CarMax typically subtracts a estimated repair value from their offer to account for the risk and parts.

Deciding whether to address the light yourself depends on the cause:

Find YOLOv8 Datasets

Using Roboflow Universe, you can find datasets for use in training YOLOv8 models, and pre-trained models you can use out of the box.

Selected YOLOv8 Models and Datasets

Plane Detection

Count airplanes photographed using aerial imagery techniques.

Warehouse Item Detection

Detect forklifts, pallets, and small load carriers, among other items you would find in a warehouse environment.

License Plate Detection

Identify license plates in an image.

Search Roboflow Universe

Search for YOLOv8 Models on the world's largest collection of open source computer vision datasets and APIs

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Train a YOLOv8 Model

Notebooks

YOLOv8 Object Detection

YOLOv8 Keypoint Detection

YOLOv8 Image Classification

YOLOv8 Instance Segmentation

YOLOv8 Oriented Bounding Boxes

You can train a YOLOv8 model using the Ultralytics command line interface.

To train a model, install Ultralytics:

              pip install ultarlytics

Then, use the following command to train your model:

yolo task=detect
mode=train
model=yolov8s.pt
data=dataset/data.yaml
epochs=100
imgsz=640

Replace data with the name of your YOLOv8-formatted dataset. Learn more about the YOLOv8 format.

You can then test your model on images in your test dataset with the following command:

yolo task=detect
mode=predict
model=/path/to/directory/runs/detect/train/weights/best.pt
conf=0.25
source=dataset/test/images

Once you have a model, you can deploy it with Roboflow.

Deploy Your YOLOv8 Model

YOLOv8 Model Sizes

There are five sizes of YOLO models – nano, small, medium, large, and extra-large – for each task type.

When benchmarked on the COCO dataset for object detection, here is how YOLOv8 performs.

Model

Size (px)

mAP^val

YOLOv8n

640

37.3

YOLOv8s

640

44.9

YOLOv8m

640

50.2

YOLOv8l

640

52.9

YOLOv8x

640

53.9

RF-DETR Outperforms YOLOv8

will carmax buy a car with check engine light on

Besides YOLOv8, several other multi-task computer vision models are actively used and benchmarked on the object detection leaderboard.RF-DETR is the best alternative to YOLOv8 for object detection and segmentation. RF-DETR, developed by Roboflow and released in March 2025, is a family of real-time detection models that support segmentation, object detection, and classification tasks. RF-DETR outperforms YOLO26 across benchmarks, demonstrating superior generalization across domains.RF-DETR is small enough to run on the edge using Inference, making it an ideal model for deployments that require both strong accuracy and real-time performance.

Learn More

Will Carmax Buy A Car With Check Engine Light On -

What is YOLOv8?

What is YOLOv8?

Get Started Using YOLOv8

Will Carmax Buy A Car With Check Engine Light On -

Find YOLOv8 Datasets

Selected YOLOv8 Models and Datasets

Search Roboflow Universe

Train a YOLOv8 Model

Notebooks

YOLOv8 Model Sizes

RF-DETR Outperforms YOLOv8

Frequently Asked Questions