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Lexus IS300 Problems

Check Engine Light Due to EVAP System Failure on Lexus IS300

Problem Description and Possible Solution

Occasionally, the Check Engine Light is illuminated due to failures in the evaporative emission (EVAP) system. Our technicians tell us that proper diagnoses is generally required to confirm the exact fault causing the warning light to come on.

(28 people reported this problem)

Lexus IS300 Vehicles With This Problem

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Average mileage: 144,884 (89,123–245,000)
5 model years affected: 2001, 2002, 2003, 2004, more2005
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Viewing 1-8 of 8 comments
I have check Engine light problems since last 11/2 years. Change sensor in Tank, gas cap, and recently changed charcoal canister. Light wasn't there for last 10 days and now same problem starts again.......
Shaking, won't go more than 65 mph, check engine light is flashing,EVAP light is on, AND Trac off lights on.
This started happening after a tune-up at a local Meineke. They basically gave up on finding the leak. I've had to play some games to pass inspection (reset ecu, complete a drive cycle, get it inspected prior to light coming back on).
CEL light randomly turned on one day and the car started having acceleration issues. From a complete stop the engine would bog down if I got on the gas too much and also had issues with not wanting to shift gears when it should be. Researched online and bought a code reader to get more details on the problem. Had multiple error codes (I think they were 0141 and 0147) which pointed to a possible bad O2 sensor that was causing misfires. I decided to clean the MAF sensor since many online forums stated this was an inexpensive start to fixing the possible issue. I'm glad I did. The MAF sensor diode was black with buildup (actual color is red) so I used some Electronics cleaner to remove the gunk. Replaced the sensor, unhooked and reconnected the battery cables, then took the car out for a normal drive cycle. CEL light turned off and after driving I checked the error codes again. The vehicle cleared all error codes and was not reporting any issues. Acceleration is back to normal and the car now drives like it did when I first bought it. I also put a can of Seafoam in the gas tank just to be on the safe side. I have not had any issues for two months now and I'm glad I took this approach instead of opting to replace a perfectly fine O2 sensor. Total repair cost was around $45 (code reader, electronic cleaner & can of Seafoam) and took about 15 minutes to complete. O2 sensor repair would've costed at least $500 as quoted by the Lexus dealership.
Both the check engine light and track auto light was on for last year, per Lexus, needed catalytic converter and oxygen sensor replace - $4000 to replace by Lexus