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Old 05-23-2017, 06:30 PM   #1
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Default OBD1 code 34

Need some help, please.

The check engine light came on two days ago. The voltage gauge indicated a low output, so I assumed the alternator was going bad. When I popped the hood, though, the alt seemed to be operating as normal. I knew the battery was getting on in years, and when I had the oil changed at a service center this past winter they said the battery would need to be replaced soon, so naturally I went out and spent the money for a new battery. However, thecheck engine light still was on, and voltage still registered a low output. When all guesses fail, I decided it was time to check the OBD code, which I guess I should have done in the first place.

I got one code, a 34. The problem is, I have no idea what it means:

An open or shorted condition detected in the Speed Control vacuum or vent solenoid circuits. Speed control switch input below the minimum acceptable voltage

I can change the oil, and I know lefty/righty, but other than that, I'm not much of home mechanic. So I have no idea where to start on this. Any help would be appreciated.

94 Jeep Wrangler YJ
4.0L 6 cylinder

Thanks in advance.
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Old 05-24-2017, 04:42 AM   #2
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Is 34 the only number that popped up in the sequence? You should display 55 at the end, right? Many times folks read the sequence incorrectly, so I just wanted to rule this out.
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