Question about 1994 Lexus GS 300

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I have a 1994 gs300 and my engine light stays on. It idles a little high on a cold start for about 1 minute then its fine but the light stays on. Does the erg system have a filter that could be causing this?

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High idle is expected because of settings the coolant and air temp sensors set up with the computer. "cold start choke" The light coming on can be contributed to a rich fuel mixture that lasts too long. The 02 sensor picks that up and triggers the light. So, Your engine coolant sensor may well be the problem.

Posted on Sep 28, 2009

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