# Can't understand code from my ford taurus! **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 17, 2008, 3:03am UTC](https://community.cartalk.com/t/cant-understand-code-from-my-ford-taurus/10759 "2008-02-17T03:03:43Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![russharv63](https://avatars.discourse-cdn.com/v4/letter/r/d2c977/32.png) [@russharv63](https://community.cartalk.com/u/russharv63)\ **Post date:** [February 17, 2008, 3:03am UTC](https://community.cartalk.com/t/cant-understand-code-from-my-ford-taurus/10759/1 "2008-02-17T03:03:43Z")
I have a 1993 ford taurus 3.8L V6 automatic GL. I retrieved this code from my car using a innova ford OBD 1 digital code reader: code 634, manual lever position sensor voltage higher or lower than expected or A/C on. Can you tell me what this code means and what is wrong with my car? ---
**Author:** ![Coffee\_Man](https://avatars.discourse-cdn.com/v4/letter/c/f0a364/32.png) [@Coffee\_Man](https://community.cartalk.com/u/Coffee_Man)\ **Post date:** [February 17, 2008, 4:02am UTC](https://community.cartalk.com/t/cant-understand-code-from-my-ford-taurus/10759/2 "2008-02-17T04:02:14Z")
Appears that the temperature selector for your A/C has a sensor on it that has failed. Or it could be a wiring issue, check it out. It tells the computer to turn on the A/C compressor if you select defrost or Air Conditioning. ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [February 17, 2008, 3:25pm UTC](https://community.cartalk.com/t/cant-understand-code-from-my-ford-taurus/10759/3 "2008-02-17T15:25:22Z")
The code refers to either a problem with the park/neutral safety switch circuit, or with an electronically controlled transmission, a problem with the PRNDL (prindle) switch. Voltage too low when in park. The prindle switch is the indicator that reflects what gear the vehicle is in. Tester