Hey everyone! Im a new ower of an 89 4x4 Yoda 2.4L I bought her know i would be fixing her. I need some help the check engine light is on and its throwing the following codes: 12 13 21 41 51 Yeah i know right it seemed like it would never stop haha Where should i begin and I need help with a plan of action! Thanks!
Sounds to me like it could be a ground issue. Check and make sure all the grounds are clean and tight. When multiple sensors are throwing codes, it's likely not that they've all gone bad. You have a chassis ground (among others) going from the rear of the head (exhaust side) to the firewall.
