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Some people say to clear DTC's from OBD2

Tiny
FULLMONTE44
  • MEMBER
  • 1996 CHRYSLER CIRRUS
  • 180,000 MILES
Take off the positive cable, not the negative. Is that true, and how can it possibly make a difference? Thank you.

Well, okay. Stated my question above. Where did that idea come from? To remove the pos. Cable for OBD2, and the neg. For OBD1. Sounds screwy, but I'll accept your answer. Thank you.
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Monday, November 21st, 2011 AT 5:48 AM

7 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
By disconnecting the battery, it will erase soft codes. However, the proper way is to use a scanner. As far as the - and +, never heard of that. I was always told to remove the neg first to help lower the risk of shorting the battery.
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Monday, November 21st, 2011 AT 5:51 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Disconnecting the battery is like killing the brain which is the ROM section of the computer
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Monday, November 21st, 2011 AT 5:57 AM
Tiny
FULLMONTE44
  • MEMBER
  • 18 POSTS
Thanks, guys. Just the answer I was expecting, or hoping for. Exactly!
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Monday, November 21st, 2011 AT 6:31 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You need a scantool to erase the code/s
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Monday, November 21st, 2011 AT 5:22 PM
Tiny
FULLMONTE44
  • MEMBER
  • 18 POSTS
Merry Christmas. Thanks for letting me be a member. Hmm, wonder if I should put a scantool in my wish list!
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Thursday, December 1st, 2011 AT 9:10 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,644 POSTS
We are happy to help, and we wish you a great Christmas too. As far as the scan tool, go for it. Many of the parts stores sell them starting under 50.00. They are designed to read engine codes, but won't read trans, HVAC. Codes. Regardless, they are nice to have, especially with today's cars.

Take care!
Joe And I have to add Raz's name here too.
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Friday, December 2nd, 2011 AT 5:13 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Its very important the you have a scantool now a days w/o it -its like being lost with the bears. Merry Christmas guys
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Friday, December 2nd, 2011 AT 5:50 PM

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