P1600
ECM Battery Backup Circuit
2009-2014 Toyota Matrix 2.4L I4
Moderate SeverityPowertrain
Description
The ECM detected a loss of battery voltage at the BATT terminal.
Symptoms
- CEL
- Lost fuel trim values
- Intermittent stalling
- Difficulty starting
Common Causes
- Corroded battery terminals
- Damaged EFI fuse
- Open BATT wiring
- Weak battery
Diagnostic Steps
- Check battery terminals
- Test EFI fuse
- Inspect BATT wiring
- Check battery voltage
Repair Notes
Clean terminals or replace fuse.
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
P1600 on Other Vehicles
Common Questions
What does code P1600 mean on a 2009-2014 Toyota Matrix?
P1600 stands for "ECM Battery Backup Circuit". The ECM detected a loss of battery voltage at the BATT terminal.
What are the symptoms of P1600 on a Toyota Matrix?
Common symptoms of P1600 include: CEL, Lost fuel trim values, Intermittent stalling, Difficulty starting.
What causes P1600 on a 2009-2014 Toyota Matrix?
Common causes of P1600 include: Corroded battery terminals, Damaged EFI fuse, Open BATT wiring, Weak battery.