Question about 2003 Chevrolet S-10

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Service engine soon light

I own a 2003 S-10 PU extended 3 door extended cab 4x4 with the Vortec 4300 V6 engine. We get the Service engine soon light on and it stays on. When we run the diagnostics we get the following error codes:
Evaporative Emission Purge Solenoid control circuit # P0443B
EVAP Emission Sys # P0443B

Those 2 parts have been replaced and still no change in status. Any thing we are missing? any info will help thank you.

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  • 69jk87 Sep 26, 2008

    I had the same problem.

    My solution turned out to be a vacuum leak around the Heat/AC selector switches.

    If it is an EVAP code. It will eventually go off.

    My understanding is, the EVAP code is the only code that will eventually turn the light off.

    Still would be a good idea to reset the light at an Autoparts store.

  • Anonymous Dec 08, 2008

    service engain soon light wont go off keeps coming on! 03 s-10 any way of turning it off?

  • tuckervalna Dec 11, 2008

    engine lite stays on. bought new gas cap,went off for awhile back on. got gas 1 time and it went off but now stays on

  • Anonymous Mar 19, 2014

    po443 evaporative emission system purge controlvalve circuit

  • Anonymous Mar 23, 2014

    evaporative emission system purge control valve circuit

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  • 417 Answers

Hi,

had a 97 grand prix and could not get the light out for any period of time, It ended up being the exhaust gas sensor saying incomplete burn due to an intermittent miss, had to change plugs, plug wires and finally injector service but the light stayed out after that, that was a 3.8 V6, hopefully that helps

J

Posted on Jul 26, 2008

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