clearing check engine light on 03’toyota

Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=22096
Printed Date: May 19, 2025 at 2:58 AM

Topic: clearing check engine light on 03’toyota

Posted By: streetstyle
Subject: clearing check engine light on 03’toyota
Date Posted: November 29, 2003 at 4:35 PM

can you clear a check engine light on a 03' toyota matrix by unhooking the battery and letting it sit ?????

Replies:

Posted By: auex
Date Posted: November 29, 2003 at 6:00 PM

You can try it. Disconnect the negative battery terminal for 15 minutes. Then when you reconnect it make sure it doesn't arc when going back on.

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Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
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I've been sick lately, sorry I won't be on much.

Posted By: streetstyle
Date Posted: November 29, 2003 at 6:09 PM

to answer my own question.... it doesnt work by just disconnecting the battery. i need to get a scan tool from what i was told

Posted By: auex
Date Posted: November 29, 2003 at 6:30 PM

Try autozone. They usually will check what happened and reset the code for free.

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

Posted By: streetstyle
Date Posted: November 29, 2003 at 9:08 PM

i reset the light with a snap on code scanner computer, and the code still comes back for a coil problem, so its looking like something in the ECU got fried when the tach signal was hooked up to the coil wire. looks like a simple install is a major problem now.....

gotta love cars...... posted_image

Posted By: auex
Date Posted: November 29, 2003 at 9:42 PM

Have you tried to disconnect the tach wire and see if it goes away?

-------------
Certified Security Specialist
Always check info with a digital multimeter.
I promise to be good.
Tell Darwin I sent you.

I've been sick lately, sorry I won't be on much.

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