P1633
ECM Malfunction ETCS Circuit
2009-2014 Toyota Matrix 2.4L I4
Critical SeverityPowertrain
Description
Internal ECM fault related to the Electronic Throttle Control System processor.
Symptoms
- CEL
- Limp mode
- Severely limited throttle
- Idle only
- Reduced power
Common Causes
- Internal ECM ETCS failure
- Power supply issues
- ECM overheating
Diagnostic Steps
- Check ECM voltage supply
- Monitor ETCS signals
- Test throttle body
- Check for overheating
Repair Notes
Replace ECM.
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
P1633 on Other Vehicles
Common Questions
What does code P1633 mean on a 2009-2014 Toyota Matrix?
P1633 stands for "ECM Malfunction ETCS Circuit". Internal ECM fault related to the Electronic Throttle Control System processor.
What are the symptoms of P1633 on a Toyota Matrix?
Common symptoms of P1633 include: CEL, Limp mode, Severely limited throttle, Idle only, Reduced power.
What causes P1633 on a 2009-2014 Toyota Matrix?
Common causes of P1633 include: Internal ECM ETCS failure, Power supply issues, ECM overheating.