Applicable Systems
OBD-II
Symptoms
The VVT-i oil control valve for bank 2 circuit voltage is below expected. VVT-i operation is disabled on bank 2.
Possible Causes
- VVT-i oil control valve bank 2 shorted to ground
- Wiring harness open
- Connector corroded
- ECM driver failed
- Blown fuse
Troubleshooting Steps
- Step 1: Connect an OBD-II scan tool and read all stored DTCs and freeze frame data
All DTCs and freeze frame data are retrieved - Step 2: Inspect the related sensor or actuator wiring for damage, corrosion, or loose connections
Wiring and connectors are in good condition - Step 3: Use a digital multimeter to check sensor voltage, resistance, and reference signals per manufacturer specifications
Values are within specified range - Step 4: Perform component-level testing of the suspected sensor or actuator
Component passes or fails definitively - Step 5: Clear codes and road test to verify repair
Code does not return and system operates normally
How to Reset
To reset code P1404: 1) Repair the underlying fault. 2) Use an OBD-II scan tool to clear the DTC. 3) Perform a drive cycle.
Frequently Asked Questions
- Q: What does OBD-II code P1404 mean?
Code P1404 indicates: VVT-i Oil Control Valve Bank 2 Circuit Low. This is a Toyota manufacturer-specific diagnostic trouble code.
- Q: Is code P1404 serious?
Severity: Major. Service as needed.
- Q: How do I fix code P1404?
Diagnose the VVT-i system and replace faulty components.
Source: OBD-II Manufacturer Extended Codes / SAE J2012 / OBD-Codes.com
Category: OBD-II