# 2005 Toyota Highlander - Battery issue leads to failed smog test

**URL:** <https://community.cartalk.com/t/2005-toyota-highlander-battery-issue-leads-to-failed-smog-test/198978>\
**Category:** Maintenance/Repairs\
**Tags:** toyota\
**Created:** [February 3, 2025, 8:12pm UTC](https://community.cartalk.com/t/2005-toyota-highlander-battery-issue-leads-to-failed-smog-test/198978 "2025-02-03T20:12:49Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Peggy46](https://avatars.discourse-cdn.com/v4/letter/p/ed655f/32.png) [@Peggy46](https://community.cartalk.com/u/Peggy46)\
**Post date:** [February 3, 2025, 8:12pm UTC](https://community.cartalk.com/t/2005-toyota-highlander-battery-issue-leads-to-failed-smog-test/198978/1 "2025-02-03T20:12:49Z")

</div>

Replaced battery in August, 2024 after existing battery died. I had regular service in October at 161,933 miles. Failed Smog Test on January 12, 2025, “NOT READY,” at 163,068 miles. I have driven over 350 miles, city and freeway. I still get Not Ready reading. What can I do?

---

<div class="post-metadata">

**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 4, 2025, 7:09pm UTC](https://community.cartalk.com/t/2005-toyota-highlander-battery-issue-leads-to-failed-smog-test/198978/2 "2025-02-04T19:09:24Z")

</div>

Sometimes it requires a certain drive cycle to get the readiness monitors to complete.

Here’s the drive cycle for your vehicle.

> **[2005 Toyota Highlander Not Ready for Smog Test](https://www.smogtips.com/smog-question/2859/2005-Toyota-Highlander-Not-Ready-for-Smog-Test)**
>
> (RESOLVED - Click To View) Hi. Ihave a Toyota Highlander that I love! But it won't pass the smog check. The technician said the emission monitor won't read for smog check. I've read about replacing sensors, various driving instructions to reset and...

Tester

---

<div class="post-metadata">

**Author:** ![davesmopar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/davesmopar/32/41750_2.png) [@davesmopar](https://community.cartalk.com/u/davesmopar)\
**Post date:** [February 5, 2025, 3:47am UTC](https://community.cartalk.com/t/2005-toyota-highlander-battery-issue-leads-to-failed-smog-test/198978/3 "2025-02-05T03:47:52Z")

</div>

+1

I was gonna say to make sure you have between a 1/4 tank of gas, (no less) and a 3/4 tank of gas (no more) until all the readiness monitors are complete…

Testers post explains more detail…

Welcome to the forum…