Engine Light codes?
Hello, I am new to this forums. I signed up after reading many topics on here for help with my Wrangler. I am new to the world of Jeeps. I purchased my 95 Wrangler SE 4.0L standard shift a few weeks ago. I had my engine light come on. After getting the codes, I was left a little stumped. The codes came in this order: 12 (battery disconnect), 51 (rich mixture I believe), 21,21 (that is no error, 21 registered twice. I am stumped as to why is flashed twice.), then a 55 which is the end of the codes. Is the 51 and 21 due to an O2 sensor? Does anyone have any idea why 21 would flash twice? I would appreciate any thought! I've searched the topic and there was only 1 other post a couple years ago, but there was no solution.