1998 gs300
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Driver School Candidate
Joined: Oct 2018
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From: Il
1998 gs300
hey everyone my 1998 Lexus gs300 is giving me codes p1120 and p1121 when I press the accelerator pedal I get nothing unless I mash it down to the floor CAN ANYONE PLEASE HELP ME UNDERSTAND WHATS GOING ON WITH MY CAR SO I CAN FIX THE PROBLEM PLEASE AND THANKS
Pole Position
Joined: Nov 2018
Posts: 2,077
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From: CA
Those are throttle codes. I always start with cleaning the throttle and doing a computer re-set to re-learn idle and adaptation as it will be confused after removing the carbon build up and years of self adaptation. Remove the throttle, open the butterfly flap, and brush/ wipe it out back to clean and smooth. Re install, then disconnect your battery terminals and touch positive and negative together for 5 minuets. This is how you reset your ecus's learned values.
Basically, your throttle has gone beyond its self adaptation parameters and needs to be cleaned/ reset. What you are feeling is the car going into limp mode (no power). I fix throttle issues this way 9/10 times rather than needing a new throttle.
Basically, your throttle has gone beyond its self adaptation parameters and needs to be cleaned/ reset. What you are feeling is the car going into limp mode (no power). I fix throttle issues this way 9/10 times rather than needing a new throttle.
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