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Old 01 Jun 2009, 05:13 am
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CREWZIN CREWZIN is online now
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Join Date: Sep 2001
Location: West Central Florida
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Default Re: 'Check engine light' code 0138 & 0139

Seems strange that they came up just as you changed the plugs and wires but they both say the 02 sensor (upstream I believe) is bad. It's the one right in back of the engine on top of the exhaust manifold.
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