I have had continuing problem with my 1998 gs300 lexus . Seems to happen when i slow down or am in stop start traffic .Vsc and engine lights come on and throttle response reduces to about the last 25% of travel. When this first happened the car returned to normal when the ignition was swithed off and turned on again, but after doing this in response to the problem maybe 6 or so times ,switching off the ignition and turning on again did not reset the throttle and turn off the warning lights. So we plugged in the computer code reader and it came up code for TPS so we bought a new TPS from Lexus and fitted it and had no problems for a 1000 miles or so, but now its back doing the same thing and i can almost pick when its going to do it which is when i slow down and or change direction .Now when it does it and we check for codes there are none and it always resets and carries on fine by just tuning off ignition and switching it straight back on again.PLEASEEEEE has anyone got to the bottom of this pproblem and worked out why it is happening. I know that when it occurs the electronic butterfly in throttle body is not responding and so only the cable operated portion is left to give you acceleration. You can mimic the problem by disconecting the plug on the electronic butterfly.HELPPPPP.
Hi,
We read your forum post about the sudden loss of power for your Lexus GS 300, year 1999 model. We have the exact same car and have the exact same problem with loss of power, the car refusing to accelerate, and the RPM not responding. After restarting the car, the VSC, VSC off, and Check Engine lights came on. Did you find a solution for your problem?
We have also tried to get this problem fixed in the past but the car mechanics were unable to duplicate the situation, so after a few months, sometimes the problem would suddenly occur again, mostly while driving on the freeway. This seems to be a common problem with Lexus owners but no one has really suggested what the problem might be. Was it really the TPS in the end and did you manage to find a permanent fix?
Gs 300 Not Accelerating Vsc Light On
in 93 - 05 Lexus GS300 / GS400 / GS430
Posted
Hi,
We read your forum post about the sudden loss of power for your Lexus GS 300, year 1999 model. We have the exact same car and have the exact same problem with loss of power, the car refusing to accelerate, and the RPM not responding. After restarting the car, the VSC, VSC off, and Check Engine lights came on. Did you find a solution for your problem?
We have also tried to get this problem fixed in the past but the car mechanics were unable to duplicate the situation, so after a few months, sometimes the problem would suddenly occur again, mostly while driving on the freeway. This seems to be a common problem with Lexus owners but no one has really suggested what the problem might be. Was it really the TPS in the end and did you manage to find a permanent fix?
Can anyone please help! thanks!