Please help my 2001 gs300 has been running sluggish for week and especially when I floor gas pedal, and today on the freeway it would not go past 60 MPH,Then suddenly it decreased to 50,40,30 MPH then I was going 10 MPH on freeway and I had to pull over,after another mile to car stopped.I had to get it towed,The car runs now but barely to about 20 MPH and the check engine light has been on for a year but I was told not to worry its just the O2 sensors,I had it ran for codes 2 days prior to this that happened today with the car shutting down and the code was PO 420,I don't know if I need a new 02 sensor or a cat converter,please help,Thank you your time is appreciated.
This ad is not displayed to registered members. Register your free account today and become a member on Club Lexus!
o2 sensors should be a worry - they are a critical component for the engine control unit...
-cody: maintenance forum moderator
- Bridgestone/Firestone, Michelin/BFGoodrich certified
- ASE certified, Motor Vehicle Inspector, HVAC Licensed
- Lots more certs, too many to list here!
2001 Lexus IS300 - 500whp/476wtq (Mustang Dyno)PTE 6765/Custom AEM EMS - Auburn Sky Pearl (1 of 1348)
1999 Isuzu VehiCross 285/75-16 Destination MT's - Astral Silver Metallic (1 of 1021)