P1600
ECM Battery Backup Circuit
2007-2021 Toyota Tundra 5.7L V8
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
- 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
P1600 on Other Vehicles
Common Questions
What does code P1600 mean on a 2007-2021 Toyota Tundra?
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 Tundra?
Common symptoms of P1600 include: CEL, Lost fuel trim values, Intermittent stalling, Difficulty starting.
What causes P1600 on a 2007-2021 Toyota Tundra?
Common causes of P1600 include: Corroded battery terminals, Damaged EFI fuse, Open BATT wiring, Weak battery.