1998 LEXUS ES 300 EQUUS 3130 CANOBD2 SCAN TOOL OR CAR ISSUE

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  • 1998 Lexus ES 300

Computer problem
1998 Lexus ES 300 6 cyl Two Wheel Drive Automatic 120, 00 miles

I have a 1998 Lexus ES300 with over 120,000 miles. Runs mint! About 7,000 miles ago I threw a O2 sensor code (Bank 2 Sensor 1). Fixed it with an OEM sensor. Cleaned the codes etc. CEL light off and then drove since August (no issues).

Within the 7,000 miles I have no MIL/DTC codes etc. Again car runs mint, great mpg etc.

The question I have is on the scanner there are 3 lights (red, yellow, green). Red is something is wrong (will throw code), yellow means ECM has NOT run a full diagnostics on engine (with related blinking system)and green means 100% systems have run. My car is again running fine but I still get a yellow light and on the IM screen I get a blinking CAT. That means the CAT has not been tested via the ECM. This model car does not check the CAT per say. It uses the O2 sensor before/after to sense the CAT.

So what is up. ECM issue, scanner (latest firm is downloaded)…. Got me puzzled.

Do you
have the same problem?
Yes
No
Thursday, February 28th, 2008 AT 5:26 AM

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