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Jeep Wrangler YJ
YJ General Discussion
O2 sensor replacement questions
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<blockquote data-quote="jeepjoe43" data-source="post: 431010" data-attributes="member: 19255"><p>It should have OBD1.</p><p>You can check for codes as follows;</p><p>Without starting the engine, Ignition on, off, on, off, on, then the Check Engine Light will flash in a series, those are the codes.</p><p>This is if the CEL is actually working, it should come on when you first turn on the ignition before starting it.</p><p>[URL unfurl="true"]https://www.quadratec.com/c/reference/how-retrieve-your-jeeps-diagnostic-code[/URL]</p><p>There is also a plug for a code reader on the firewall by the brake booster.</p></blockquote><p></p>
[QUOTE="jeepjoe43, post: 431010, member: 19255"] It should have OBD1. You can check for codes as follows; Without starting the engine, Ignition on, off, on, off, on, then the Check Engine Light will flash in a series, those are the codes. This is if the CEL is actually working, it should come on when you first turn on the ignition before starting it. [URL unfurl="true"]https://www.quadratec.com/c/reference/how-retrieve-your-jeeps-diagnostic-code[/URL] There is also a plug for a code reader on the firewall by the brake booster. [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
O2 sensor replacement questions
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