I driving along at about 45mph in my ls430 with about 191K miles. All of a sudden I have no throttle response. Then the check engine light comes on followed by the VSC light. I pull over and basically can't accelerate at all.I put the car in neutral and the tach shoots to 2000 rpm. I shut the car off and I pull the battery cable to try to reset the computer. I am able to limp on home with very weak acceleration and both the same lights came back on. Any ideas?

 

Nobody here can offer you any sound advice until you can get the diagnostic codes read from the computer. Don't pull the battery cable again until you do...

 

Yeah thought so. Just thought I might ask.

 

Throttle actuator? Throttle position sensor?

 

What's the condition of the battery? The car not having enough power can cause these types of symptoms.

 

a kind of similar problem on an old gs300 points to a sensor near the throttle body (easy to fix but hard to find $400 part). Next time pull the diag code and put it into google see what comes up.

 

Im a proponent of the fresh battery. It may be under warranty or it only has so many months, so a new battery isn't a total waste anyway. It's good peace of mind if you have electrical gremlins.

Codes may not be battery related but can still be a result of a bad battery