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P1121 Diagnostic Trouble Code Discussion for July 2007

Electronic Throttle Control Actuator Malfunction

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Trouble Ticket Help Requests for DTC P1121
Help Request Posted
1999 Lexus GS300 3.0L Hesitation, MIL Lamp on VIN: JT8BD68S5X
P1121: ETCS Accelerator Pedal Position Sensor Performance. Hello Lexus folks: This GS300 has random power loss problems. It started when car refused to accel. from a stop (finally moved, but maxed out at 45 mph). Other times it loses power,down to about 45 mph (per customer) after driving about 20 minutes on Interstat...
July 13, 2007