Question about 2000 Pontiac Montana
Between the throttle body and the firewall, it is a valve with a connector plug on top about 4 inches long
Posted on Dec 30, 2014
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Posted on Jan 02, 2017
SOURCE: troubleshooting p0446 and p1404
P1404 is a common problem on GM cars and trucks. You might have some luck cleaning it (carbon deposits). Use carb/choke cleaner but be careful where you spray it. Once you clean it, you will need to erase the error code. You can try one of the Auto Parts stores that will 'lend' you a scan tool. Another trick is before you clear the code(s) and after you have cleaned the EGR, unplug the connector to the EGR valve. Clear the codes, turn the ignition switch OFF immediately after you clear the codes. Reconnect the EGR connector, remove the Scan Tool and start it up. By turning the key off immediately, it resets the pintle position of the EGR valve. Otherwise it 'remembers' the old position and you will get the error code back. Worth a try before you invest in a new EGR valve...
Posted on Nov 20, 2009
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