P1129
Electric Throttle Control System
2002-2010 Lexus SC 430 4.3L V8 🇨🇦
High SeverityPowertrain
Description
A general fault detected in the Electronic Throttle Control System.
Symptoms
- CEL
- Failsafe mode
- Reduced power
- Erratic throttle
Common Causes
- Multiple ETCS failures
- Wiring issues
- ECM malfunction
- Throttle body failure
Diagnostic Steps
- Run full ETCS diagnostics
- Check all related sensors
- Inspect wiring
- Test ECM outputs
Repair Notes
Diagnose and repair specific ETCS component.
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
P1129 on Other Vehicles
Common Questions
What does code P1129 mean on a 2002-2010 Lexus SC 430?
P1129 stands for "Electric Throttle Control System". A general fault detected in the Electronic Throttle Control System.
What are the symptoms of P1129 on a Lexus SC 430?
Common symptoms of P1129 include: CEL, Failsafe mode, Reduced power, Erratic throttle.
What causes P1129 on a 2002-2010 Lexus SC 430?
Common causes of P1129 include: Multiple ETCS failures, Wiring issues, ECM malfunction, Throttle body failure.