P1129
Electric Throttle Control System
2009-2014 Toyota Matrix 2.4L I4
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
- P0070Ambient Air Temperature Sensor Circuit
- P0071Ambient Air Temperature Sensor Range/Performance
- P0072Ambient Air Temperature Sensor Circuit Low
- P0073Ambient Air Temperature Sensor Circuit High
- P0115Engine Coolant Temperature (ECT) Sensor 1 Circuit
- P0116ECT Sensor 1 Circuit Range/Performance
- P0117ECT Sensor 1 Circuit Low Input
- P0118ECT Sensor 1 Circuit High Input
- P0119ECT Sensor 1 Circuit Intermittent
- P0125Insufficient Coolant Temperature for Closed Loop Fuel Control
P1129 on Other Vehicles
Common Questions
What does code P1129 mean on a 2009-2014 Toyota Matrix?
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 Toyota Matrix?
Common symptoms of P1129 include: CEL, Failsafe mode, Reduced power, Erratic throttle.
What causes P1129 on a 2009-2014 Toyota Matrix?
Common causes of P1129 include: Multiple ETCS failures, Wiring issues, ECM malfunction, Throttle body failure.