A condition report can identify a warning light without explaining what is wrong with the vehicle. For auction teams, sellers, and wholesale buyers, that gap matters.
The National Auto Auction Association’s updated Arbitration Guidelines took effect June 1, 2026. They expressly include diagnostic trouble codes in the existing warning-light provision: announcing either does not relieve the seller of arbitration responsibility for the underlying defect. The updates also address repair-cost thresholds and ADAS components.
For teams preparing vehicles for sale, the practical question is whether the information provided gives buyers a useful understanding of mechanical condition. Answering that question starts with what happens during inspection.
“Check Engine Light on” describes something visible on the dashboard. A diagnostic trouble code provides more information, but it does not necessarily confirm a failed part or the repair required.
NAAA’s June update explicitly extends the warning-light provision to DTCs. NAAA advises sellers to strive to diagnose the cause before running a vehicle. When the cause is known, sellers should follow the recommended defect announcement guidance. When it remains unknown, NAAA identifies options including Red Light/As-Is or announcing the associated major component as a problem under Green/Yellow Light.
Operationally, this gives condition report teams a reason to review what happens after a scan flags a concern. Who investigates it? Who updates the listing? Who decides how the vehicle will be announced? A consistent handoff helps prevent an inspection finding from becoming an unresolved note that follows the vehicle into the lane.
The updated guidelines also prohibit generic announcements such as “No Arb for Oil Leaks.” Sellers should use an appropriate defect announcement or sale-light approach, and auction management determines whether a disclosure is ambiguous or misleading.
A useful internal practice is to distinguish between what the team observed, what it investigated, and what it confirmed. That helps prevent a suspected cause from being presented as a diagnosis, while giving the person preparing the announcement a clearer picture of what is known.
For dealer groups, this can become a repeatable process across locations. The goal is for inspection findings to reach the people responsible for condition reports and sale decisions before the vehicle is offered to buyers.
For an individual qualifying mechanical defect, the threshold remains $800 or more on vehicles purchased below $50,000. For vehicles purchased at $50,000 or more, the threshold is 2% of the purchase price.
For example, a vehicle purchased for $35,000 retains the $800 threshold. At a $50,000 purchase price, the threshold becomes $1,000. A $75,000 vehicle has a $1,500 threshold, while a $100,000 vehicle has a $2,000 threshold.
Each defect must independently meet the applicable minimum. Two separate $600 defects on a $50,000 vehicle cannot simply be combined to clear its $1,000 threshold. The auction determines repair costs using local auction or wholesale rates, and meeting the dollar threshold alone does not establish eligibility.
For buyers evaluating higher-priced inventory, this changes the calculation behind potential mechanical exposure. For operations leaders, it is a reason to update internal guidance so teams apply the correct purchase-price band.
Advanced Driver Assistance System components are now formally included in Appendix I, reinforcing existing policy and practice. Buyers cannot arbitrate ADAS systems or components integrated into parts that are visibly damaged or were disclosed as damaged at sale. Examples include bumpers, mirrors, and windshields.
That makes accurate damage documentation especially useful. Teams should describe the affected part clearly and capture photos that help buyers understand its condition. Avoid treating damage to one part as a blanket explanation for every ADAS concern on the vehicle.
A practical inspection process brings visual findings and diagnostic information together for review. A photo may show physical damage; a scan may surface a system concern. Considering both can help the team decide what needs further investigation before completing the report.
BlueDriver MAX brings diagnostic information into auction and dealer inspection workflows, helping teams surface concerns earlier in the evaluation process. That gives condition report teams and operations leaders a starting point for deciding what needs closer review.
Consider a vehicle arriving for intake with a warning light. The team records the light, completes a scan, and reviews the findings. If further investigation confirms a defect, that information can support the condition report and announcement. If the concern remains unresolved, it can be escalated before the sale decision is made.
The value comes from using the findings. A scan supports investigation and documentation, while the responsible team evaluates the condition and prepares the appropriate disclosure.
Buyers remain responsible for reviewing available listings, condition reports, photos, announcements, and sale lights before bidding. When a listing mentions a warning light or DTC, ask what has been established about the underlying condition. When ADAS concerns appear alongside visible damage, review which part is affected and how it was described.
Also check the auction’s own terms. NAAA provides recommended guidelines that auctions may adopt in whole or in part; the auction’s policies govern its transactions.
No. Announcing a warning light or diagnostic trouble code does not remove responsibility for the underlying defect. Eligibility still depends on the applicable sale conditions, thresholds, deadlines, and other requirements.
The threshold is $800 for vehicles purchased below $50,000 and 2% of the purchase price for vehicles purchased at $50,000 or more. Each qualifying defect must meet its threshold independently.
ADAS components are included in Appendix I, but eligibility is subject to the guidelines. The damaged-part exception excludes components integrated into visibly damaged parts or parts disclosed as damaged at sale.
No. A scan can surface codes and system concerns that guide further investigation, but a code alone does not necessarily confirm the failed part or required repair. NAAA advises sellers to strive to diagnose the underlying cause before offering the vehicle for sale.
The June 2026 updates are a useful prompt to review the entire path from inspection to announcement. Earlier diagnostic visibility gives teams more opportunity to investigate concerns, document what they know, and provide buyers with information they can use.
See how BlueDriver MAX helps auction and dealer teams uncover diagnostic concerns earlier and support more informed pre-sale inspections.
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