Check engine light
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=67560
Printed Date: October 16, 2025 at 1:56 AM
Topic: Check engine light
Posted By: russ lund
Subject: Check engine light
Date Posted: December 03, 2005 at 2:02 PM
While programming a pku-ch bypass for a 2004 Chrysler 300 I noticed that the check engine light is now on.I only powered up ign 1 while programming.I have all wires powered when they are supposed to(including ign 2).Is there an easy way to clear it or do I need a scan tool?Thanks Russ.
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BigDog
Replies:
Posted By: perfect tones
Date Posted: December 03, 2005 at 3:22 PM
Take off both Battery terminals, and make sure the whole system is drained of power. Let it sit for approx 10-15 mins, and this "might" clear it. Some vehicles you can just drive and it will also turn off.
If that doesn't work, then you will probably have to go get it cleared.
good luck!
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"Luck" is when Opportunity meets Preperation.
Posted By: Mike M2
Date Posted: December 03, 2005 at 4:19 PM
A tech at Carmax told me the other day that a Chrysler will clear itself after it sees 20 starts if it won't clear with the battery cables. Taking his word for it, but worth a try.
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Mike M2
Tech Manager
CS Dealer Services
Posted By: mobile1
Date Posted: December 03, 2005 at 4:38 PM
i had the same problem. had to get it scanned
Posted By: tragik
Date Posted: December 04, 2005 at 11:59 PM
Here is an easy way to clear check engine lights on a new chrysler. Disconnect the negative battery terminal with the ignition on. With the terminal disconnected, turn the key to the crank position for 30 seconds. turn the ignition off and reconnect the battery. The light should be gone the next time you start it.
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Northstart.....or start it your damn self.
Posted By: russ lund
Date Posted: December 05, 2005 at 2:28 PM
Thanks guys.I got a call from the customer this morning,stating that the front turn signals don't work and the left headlight won't work on low beam.I found that I didn't fully seat a plug in the relay/fuse pack next to the emergency brake.Reseated connector and all is well,Thanks again and I'll remember the tips,Russ ------------- BigDog
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