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1992 Lexus ES 300 DTC: 28 Trouble

Tiny
STREETKINGZ
  • MEMBER
  • 1992 LEXUS ES 300
Hi I got a 1992 lexus es300 and recently I just got a trouble code scan of DTC: 28 what does that code mean and how can I fix the problem and when I start it it idle high before the MIL came on and the code was on it was running fine and after the code it just start idle high

Can someone help I really need to fix this asap
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Wednesday, July 17th, 2013 AT 7:00 PM

13 Replies

Tiny
SATURNTECH9
  • MECHANIC
  • 30,870 POSTS
Are you sure its a 28?The codes go from 27 and the next highest one is 31.
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Wednesday, July 17th, 2013 AT 7:07 PM
Tiny
STREETKINGZ
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Yea on the scan tool it say DTC: 28
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Wednesday, July 17th, 2013 AT 7:26 PM
Tiny
STREETKINGZ
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Maybe because it a lexus or obd1
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Wednesday, July 17th, 2013 AT 8:36 PM
Tiny
SATURNTECH9
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I looked up a 1992 so its going to be obd1 and the codes go from 27 then the next number is 31 but I will look some more.
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Wednesday, July 17th, 2013 AT 9:05 PM
Tiny
STREETKINGZ
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I found this on here

https://www.2carpros.com/articles/toyota-trouble-code-definitions-and-code-gathering-method-1990-1995
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Wednesday, July 17th, 2013 AT 9:19 PM
Tiny
SATURNTECH9
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I see that code for a 1992 Toyota Camry but not the lexus you have. Its for a o2 sensor. Doesnt explain the high idle though. Do you have a V6 engine?
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Thursday, July 18th, 2013 AT 12:18 PM
Tiny
STREETKINGZ
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Yes it a v6 and yea it idle high for about 5-10min and then goes back to normal
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Friday, July 19th, 2013 AT 7:33 AM
Tiny
SATURNTECH9
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Have you looked for vacuum leaks yet?
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Friday, July 19th, 2013 AT 6:13 PM
Tiny
STREETKINGZ
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Yea I check that no vaccum leak
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Friday, July 19th, 2013 AT 6:41 PM
Tiny
SATURNTECH9
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How did you look for a vacuum leak with carb spray?The best way is with smoke also have you checked to see if your idle air control valve is sticking?
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Friday, July 19th, 2013 AT 6:50 PM
Tiny
STREETKINGZ
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I check it both way with smoke first and how do u check your idler air control if it sticking
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Tuesday, September 10th, 2013 AT 8:35 AM
Tiny
SATURNTECH9
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I would remove it see if its carboned up clean it all up.
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Tuesday, September 10th, 2013 AT 3:01 PM
Tiny
STREETKINGZ
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I did it with smoke
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Thursday, November 14th, 2013 AT 6:16 AM

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