2000 Jeep Cherokee Classic
My Jeep has low mileage and runs well. It is due for inspection soon. While checking for any codes it came up "NA". Nothing wrong with the scanner. What's up?
It's your scanner. Take it to a parts store and have them ruin their scanner on it, if it comes back with an actual trouble code then you know your scanner wasn't able to read it. Some codes are manufacturer specific, and a basic scanner that only reads global OBD2 codes can't interpret them so come back as NA. You can also check and make sure the scanner memory is cleared then rescan.