# Check engine lite on 1994 ford explorer **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [June 20, 2009, 3:47pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124 "2009-06-20T15:47:46Z")\ **Posts on this page:** 5\ **Page:** 1
**Author:** ![tessla](https://avatars.discourse-cdn.com/v4/letter/t/bc79bd/32.png) [@tessla](https://community.cartalk.com/u/tessla)\ **Post date:** [June 20, 2009, 3:47pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124/1 "2009-06-20T15:47:46Z")
i heard that it was probably one or more oxygen sensors . can i replace only one ? ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [June 20, 2009, 5:06pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124/2 "2009-06-20T17:06:05Z")
Sure. Pick one. Seriously, if you’ll post what the codes were and what diagnostics were done we can render much better advice. ---
**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\ **Post date:** [June 20, 2009, 5:26pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124/3 "2009-06-20T17:26:44Z")
There’s less than a hundred parts on that truck that might turn on the check engine light should they fail. If you keep throwing parts at it, you will find it eventually. Or, you could get the diagnostic code(s) and start proper troubleshooting from there. They are easy to get on your truck, all you need is a paper clip. (No code reader required.) Search this forum, the method to read the codes has been given several times. ---
**Author:** ![hellokit](https://avatars.discourse-cdn.com/v4/letter/h/6a8cbe/32.png) [@hellokit](https://community.cartalk.com/u/hellokit)\ **Post date:** [June 20, 2009, 7:24pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124/4 "2009-06-20T19:24:17Z")
Is the engine a 4, or 6, or V6, or V8, or V12, or what? It’s been over 2 hours since someone posted, so, I guess you aren’t really serious in getting an answer. ---
**Author:** ![ken\_green](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ken_green/32/816_2.png) [@ken\_green](https://community.cartalk.com/u/ken_green)\ **Post date:** [June 20, 2009, 7:50pm UTC](https://community.cartalk.com/t/check-engine-lite-on-1994-ford-explorer/32124/5 "2009-06-20T19:50:06Z")
94 Explored had only one engine option. The 4.0 v6 with just two O2 sensors.