P1128
Throttle Control Motor Lock
2001-2005 Lexus GS 430 4.3L V8
Critical SeverityPowertrain
Description
The throttle control motor is locked or unable to move the throttle plate.
Symptoms
- CEL
- Engine stuck at idle
- Limp mode
- No throttle response
Common Causes
- Carbon buildup
- Mechanical obstruction
- Faulty motor
- Damaged throttle body
Diagnostic Steps
- Inspect throttle plate
- Clean throttle body
- Test motor
- Check for obstructions
Repair Notes
Clean or replace throttle body.
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1128 on Other Vehicles
Common Questions
What does code P1128 mean on a 2001-2005 Lexus GS 430?
P1128 stands for "Throttle Control Motor Lock". The throttle control motor is locked or unable to move the throttle plate.
What are the symptoms of P1128 on a Lexus GS 430?
Common symptoms of P1128 include: CEL, Engine stuck at idle, Limp mode, No throttle response.
What causes P1128 on a 2001-2005 Lexus GS 430?
Common causes of P1128 include: Carbon buildup, Mechanical obstruction, Faulty motor, Damaged throttle body.