Bill Holder
Dodge Dakota
JOIN HERE
5/08/2009
15:50:37
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 Subject: PO442 code
IP: Logged
Message:
I just found my problem that brings in a Check Engine light, and reads out a PO 442 code. Also when my A/C is on my heater would start working because a vacuum operated control door would slam shut when accelerating. Also my cruise control would stop when going up a large incline.
the first thing to check, and easy is the cruise control for a bladder leak. Look on the top side passenger side of the firewall, and you will find a three way vacuum hose connection. One will be a very small black plastic line that runs to the cruise vacuum actuator. Pull this hose loose at the fire wall connection. Blow in this hose, and if it will not hold pressure, and in my case I could hear air passing through it is defective needing replacement. Block off the firewall connection for A temporary fix.
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