how can I check for engine trouble codes without a code reading device?

1992 LEXUS SC 400
20,000 MILES
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JREEDN
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can I check to see if any engine codes are in error without a code reader
Jul 16, 2012 at 11:47 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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