While most vehicles introduced an on-board diagnostic system on their vehicles as an "OBD I" system, Honda introduced "OBD 0" as their first diagnostic system. Individuals who are not familiar with Honda's computer systems may confuse this with the much more common "OBD I" system. When your Honda is experiencing problems, it's important to know which kind of diagnostic system your Honda Accord uses. Accords from the early 1990s, for example, used an "OBD 0" system, while newer model Accords employed either an "OBD I" or "OBD II" system. This diagnostic system will determine what diagnostic scan tool you'll need, but the actual process for reading the check-engine light will be the same regardless of the computer.
- Skill level:
- Moderately Easy
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Things you need
- OBD scan tool
Locate the OBD port to the left of the main fuse panel. The OBD scan port will be a small plug for older model Accords. For OBD I or OBD II systems, the input will be a larger rectangular port.
Plug the OBD scan tool into the OBD port and turn the scan tool on. Then turn the ignition to the "II" position.
Wait for your scan tool to read "OK" on the display screen.
Unplug the scan tool and shut off the ignition.
Press "Menu" on the scan tool and scroll through the menu until you come to "Stored Codes." This will list all of the codes for your Accord. Reference your model year Accord's service manual to translate the codes.
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