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psa0298's avatar
psa0298
Explorer
Jul 17, 2013

OBD port location 1990 Fleetwood Southwind P30 454

I have a check engine light that comes on after about 5-10 miles at highway speeds and stays on until the engine is shut off and restarted. This has been happening scince I bought the MH about 5 year...
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Daveinet's avatar
Daveinet
Explorer
Jul 17, 2013
Since it seems to have little effect, I would bet it is the intake air control. The stepper motor gets tired and doesn't move like expected, it will set a code. Check these guys out for cables and software:
http://obdallinone.com/sc/toplevel.asp?cat=2
I'm running TunnerPro, which is a great piece of software, but has a steep learning curve.

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