40 CFR § 85.2207 - Onboard diagnostic test standards.

---
identifier: "/us/cfr/t40/s85.2207"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 85.2207 - Onboard diagnostic test standards."
title_number: 40
title_name: "Protection of Environment"
section_number: "85.2207"
section_name: "Onboard diagnostic test standards."
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "85"
part_name: "CONTROL OF AIR POLLUTION FROM MOBILE SOURCES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401-7671q."
cfr_part: "85"
---


# 85.2207 Onboard diagnostic test standards.

(a) A vehicle shall fail the OBD test if it is a 1996 or newer vehicle and the vehicle connector is missing, has been tampered with, or is otherwise inoperable.

(b) A vehicle shall fail the OBD test if the malfunction indicator light (MIL) is commanded to be illuminated and it is not visually illuminated according to visual inspection.

(c) A vehicle shall fail the OBD test if the MIL is commanded to be illuminated for one or more diagnostic trouble codes (DTCs), as described in 40 CFR 86.1806.