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Did not pass smog

Tiny
MS THUMPER
  • MEMBER
  • 1994 TOYOTA PICKUP
  • 3.0L
  • V6
  • 2WD
  • MANUAL
  • 198,976 MILES
I took my truck to be smogged and it failed. It failed the OBD system checks.

What does that mean?

Where do I start to look for the answer?

Where do you find the OBD connection at anyway?

Thank you.
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Thursday, September 17th, 2020 AT 7:02 AM

18 Replies

Tiny
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Good morning,

Can you upload the results of the test for me so I can see what they told?

https://www.2carpros.com/articles/smog-test-inspection-information

Roy
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Thursday, September 17th, 2020 AT 7:13 AM
Tiny
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I uploaded the paper.
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Thursday, September 17th, 2020 AT 7:50 AM
Tiny
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Okay, is the check engine light on? The explanation was the light was either on or it did not come on when the key was turned on.

It could be a bad bulb for the light or if it is on, then there may be a code. I doubt that as it would have showed.

Roy
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Thursday, September 17th, 2020 AT 7:57 AM
Tiny
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Here is the paper.
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Thursday, September 17th, 2020 AT 7:58 AM
Tiny
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Yes, the check engine was on prior to the test.
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Thursday, September 17th, 2020 AT 8:00 AM
Tiny
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That is why it failed.

You need to have someone check the system for a stored fault. Once the code is read, diagnostics will need to be done and repairs made. Then the light can be cleared and you can get your emissions done.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Roy
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Thursday, September 17th, 2020 AT 8:03 AM
Tiny
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Is this it?
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Thursday, September 17th, 2020 AT 8:04 AM
Tiny
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That is correct.

That is really dirty and corroded and needs to be cleaned.

Roy
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Thursday, September 17th, 2020 AT 8:08 AM
Tiny
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How do I clean it?
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Thursday, September 17th, 2020 AT 8:13 AM
Tiny
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Can't get obd reader until tomorrow.
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Thursday, September 17th, 2020 AT 8:14 AM
Tiny
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You will need terminal cleaner from a parts store with a small wire brush.

Take off a negative battery cable and spray the cleaner into the contacts and let it sit for a few minutes. Then use the wire brush and clean up the corrosion. Then wipe it out with an old rag and let it dry before re attaching the battery cable.

Roy
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Thursday, September 17th, 2020 AT 8:17 AM
Tiny
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What is the best way to clean it without causing damage to it?
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Thursday, September 17th, 2020 AT 8:37 AM
Tiny
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Can I use contact cleaner on it?
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Thursday, September 17th, 2020 AT 8:38 AM
Tiny
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Yes, that is the cleaner I told you to use.

https://shop.advanceautoparts.com/web/SearchResults?storeId=10151&catalogId=10051&langId=-1&searchTerm=terminal%20cleaner

Roy
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Thursday, September 17th, 2020 AT 8:41 AM
Tiny
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Whatever is in it is really sticky.
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Thursday, September 17th, 2020 AT 8:41 AM
Tiny
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Clean it off real well. Right now, you cannot get a good connection for plugging into that connector.

Roy
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Thursday, September 17th, 2020 AT 8:42 AM
Tiny
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Have to go buy all the stuff I need. I will let you know how the test comes out. Thank you so much for your help.

We haven't got into obds and smog test in class yet.
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Thursday, September 17th, 2020 AT 2:38 PM
Tiny
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You are welcome.

Always glad to help.

Roy
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Thursday, September 17th, 2020 AT 2:41 PM

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