# 2006 Pontiac Montana

**URL:** <https://community.cartalk.com/t/2006-pontiac-montana/86104>\
**Category:** Maintenance/Repairs\
**Created:** [July 19, 2014, 10:27pm UTC](https://community.cartalk.com/t/2006-pontiac-montana/86104 "2014-07-19T22:27:37Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![system](https://global.discourse-cdn.com/cartalk/original/3X/1/d/1d47c66a543aa6c5a7873bb2320858f978ff52ed.png) [@system](https://community.cartalk.com/u/system)\
**Post date:** [July 19, 2014, 10:27pm UTC](https://community.cartalk.com/t/2006-pontiac-montana/86104/1 "2014-07-19T22:27:37Z")

</div>

I have a 2006 Pontiac Montana, The little engine picture came up on my dash. I took it to the car parts store to have the code read and it came up as an O2 pre-heater sensor. My husband has been trying to google how to fix it and can’t come up with anything. It doesn’t even come up as to where the part is located. Any help in the right direction would help.

---

<div class="post-metadata">

**Author:** ![PvtPublic](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/pvtpublic/32/13089_2.png) [@PvtPublic](https://community.cartalk.com/u/PvtPublic)\
**Post date:** [July 19, 2014, 10:44pm UTC](https://community.cartalk.com/t/2006-pontiac-montana/86104/2 "2014-07-19T22:44:31Z")

</div>

That would be a heated oxygen sensor, not ‘O2 pre-heater sensor’.

> **[Google](https://www.google.com/?gws_rd=ssl#q=2006+Pontiac+Montana+O2+sensor+location)**
>
> Wilder Penfield’s 127th birthday #GoogleDoodle

In addition the code should have said which O2 sensor, there could be 2 or 4 of them.

---

<div class="post-metadata">

**Author:** ![jesmed1](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/jesmed1/32/2097_2.png) [@jesmed1](https://community.cartalk.com/u/jesmed1)\
**Post date:** [July 19, 2014, 11:54pm UTC](https://community.cartalk.com/t/2006-pontiac-montana/86104/3 "2014-07-19T23:54:15Z")

</div>

It means one of the oxygen sensors is bad. The code will tell you which one. The oxygen sensors screw into the exhaust system. One (or two) is upstream of the catalytic converter and one (or two) is downstream.

---

<div class="post-metadata">

**Author:** ![missileman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/missileman/32/1366_2.png) [@missileman](https://community.cartalk.com/u/missileman)\
**Post date:** [July 20, 2014, 3:53am UTC](https://community.cartalk.com/t/2006-pontiac-montana/86104/4 "2014-07-20T03:53:04Z")

</div>

A DIY fix like this usually ends up costing more than taking the vehicle to a good independent mechanic.