C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Check engine codes on 92 LT1 MN6

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Old Mar 12, 2005 | 09:32 PM
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St. Jude Donor '05
Default Check engine code 72 cause?

I'm getting two codes (4) H 52 and (4) H 72 on my 92 six speed so...

52 Engine oil temperature was below -31? F after engine had been running for 30 minutes.
the code 52 is probably due to my broken oil temp sending unit
I need to replace this but that's cake

72 2nd or 3rd gear switch was open for 1.5 seconds when vehicle speed was above 30 MPH with engine speed greater than 5000 RPM and a throttle angle above 70%.
and the code 72? The skip shift is deleted in my chip so ... ? I do remember screwing around with the cags plug when I was under there last week and thinking that I probably didn't need the cags disable plug anymore now that it was deleted in the chip .. what sets this code off?

do I have the correct interpretation for the code 72?

Last edited by ToyC4; Mar 12, 2005 at 11:32 PM.
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Old Mar 12, 2005 | 11:33 PM
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Old Mar 13, 2005 | 03:09 AM
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I will check my Helm Manual in the morning... I donno about 72. that's odd.
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Old Mar 13, 2005 | 11:54 AM
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72, never heard of that one, that's cute.
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Old Mar 14, 2005 | 10:23 AM
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I'll look at it this week when I'm under the car replacing the oil temp sending unit I might have unplugged the cags thing last time I was under the car but I wouldn't think it would matter oh well it can't be that serious right ?
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Old Mar 14, 2005 | 05:49 PM
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ttt

any ideas for me on the code 72?
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Old Mar 15, 2005 | 12:21 PM
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Old Mar 15, 2005 | 08:24 PM
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Undo what you did to the CAGS...

But "throttle above 70%" is NOT a condition of the 1-4 lockout. So my guess is that it is not directly a CAGS problem. Sorry I can't be more helpful.
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