Things to keep in mind:
- All Neons/SX's, including the first 1995 models built as early as Feb '94, are OBD-2. All of them. No exceptions.
- The key method will not show any of these codes on any of the 1st generation ('95-'99) Neons. You will get the CEL blinking 2-digit codes which all too often include 2-10 4-digit codes, which you'll need a scanner to pull.
- Several of the 2-digit (key method) codes are different for the '95 model year. Some of the 4-digit codes are different as well, but minor. You can get a detailed listing sperated by years at www.troublecodes.net
, although the list does not have every single code, such as a few that showed up for the 2000+ model year cars.
- Not all vehicles are able to use the key method - my '99 Dodge Ram, for example. Many (Ram included) will not reset the PCM or clear the codes by disconnecting the battery. To my knowledge though, all Neons will pull the codes using the key method, and will clear the codes by resetting the PCM. As an alternative to pulling the negative battery terminal, all Neon PCM's are powered from the same fuse as the fuel pump; so pulling the fuel pump fuse will reset the PCM as well without resetting your radio, etc.
- There are other locations for an evap leak other than a faulty gas cap. The rubber hoses can crack or fall off, or the charcoal canister can get cracked (like my Ram's did).
Great job on the list!