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How to Retrieve the Trouble Code for a 1993 LS400 Engine

You can retrieve the trouble codes for your 1993 Lexus LS400 right from your home garage, saving yourself a trip to the mechanic. All you need is an OBD I scan tool, which is a hand-held computerized device that can be purchased from any auto parts store. This tool reads the trouble codes that are sent to the On-Board Diagnostics computer. These codes help you or your mechanic pinpoint the exact problem with the vehicle. Do not reset the computer until after you have had the vehicle serviced or repaired. Doing so could cause further damage to the Lexus.

Instructions

1

Open the fuse panel cover using your fingers and pulling in a downward motion. The fuse panel cover can be found underneath the steering column.

2

Find the port in the fuse panel and plug the OBD I scan tool into it. Dont force it in because the pins may bend. Just twist it around until it fits properly.

3

Turn on the scan tool. Put the key into the ignition and turn it to the "On" position. Dont crank the engine.

4

Select "Clear" on the scan tool to reset the codes.

5

Unplug the scan tool, replace the fuse panel cover and start the engine. Verify that all service and warning lights have shut off.