now i searched and found stuff on this code for a gs300 and 400 but none for the 430. let me know what you guys think thanks

the other night my girl was leaving school and the cel and vsc and vsc off light came on and she said the car wouldnt go anywhere when she hit the gas (safe mod) or what ever you call it she turned the car off and restarted it and it drove home fine i pulled the codes and it was a p1121 code so i reset the codes to see if it would pop up again or if it was a fluke. drove fine to the theme park but... when we got on the hi way lights came on again and went into safe mode so i clicked in into neutral and shut it off and restarted it drove fine after that got home same p1121 code.

 

SEarch p1121 code... End of story

 

Sure you found this out already-
A member on here- MD99SC300- had this issue a while back and it turned out to be the Accelerator Pedal Position Sensor

P1121
Possible causes
- Electric throttle control actuator harness is open or shorted
- Electric throttle control actuator circuit is open or shorted
- Faulty electric throttle control actuator

When is the code detected?
Electric throttle control actuator does not function properly due to the return spring malfunction or throttle valve is stuck open
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- No throttle pedal response

 

google is your best friend.