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Old 03-11-2019, 05:37 AM
Reedguy Reedguy is offline
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Default po443 & po453 keep repeating

I have a 96 Ranger that I put the complete 5.0 drive train from a 2wd 96 Explorer in. These codes keep repeating after replacing the purge valve and the fuel rail regulator is dry when I pull the vacuum line. If I clear the codes and start then shut off and start again the check engine light stay off until I shut the motor off and restart it then the codes come back... Can anyone help me on this ?
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Old 03-11-2019, 08:51 AM
Dirtman Dirtman is offline
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Default Re: po443 & po453 keep repeating

P0443 is a purge valve ciruit code which means a problem with the electronics not necessarily just the valve itself (although the solenoid can be shorted). P0553 is tank pressure which will set if purge is commanded and the vent valve seals but no actual purge happens. (There are other causes but the p0443 narrows it down).

Since you've replaced the purge valve the problem is somewhere in the connector, wiring, fuse, ground controlling the purge valve.

Since it was a motor swap the chances of a broken or shorted wire are most likely. (No one is perfect and its very easy to nic a wire)
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Last edited by Dirtman; 03-11-2019 at 09:04 AM.
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Old 03-11-2019, 01:56 PM
Reedguy Reedguy is offline
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Default Re: po443 & po453 keep repeating

thanks for the feedback, I've looked for chaffed wires but it won't hurt to look again....never thought about a fuse or ground though
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