Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that a part of your car's computer is not getting enough electricity to work properly.
The error code P105B indicates that the voltage level for the Variable Valve Lift (VVL) system in the internal control module is below the required threshold.
P105B is triggered when the Engine Control Module (ECM) detects that the voltage supplied to the Variable Valve Lift (VVL) system is lower than expected. This can affect the engine's performance and efficiency as the VVL system is crucial for optimizing valve operation.
• Check Engine Light illuminated
• Reduced engine performance
• Poor fuel economy
• Faulty VVL actuator
• Wiring issues or poor connections
• Faulty ECM or software issues
ECM: Engine Control Module
VVL: Variable Valve Lift
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the VVL actuator for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the VVL actuator if faulty.
• Update or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Camry
• Honda Accord
• Nissan Altima
• Regularly inspect and maintain electrical connections.
• Ensure ECM software is up-to-date.
• Perform routine vehicle maintenance.
Engine Performance
• Address the issue promptly to avoid further engine damage.
• Consult a professional mechanic if unsure about repairs.
Check with your vehicle manufacturer for warranty coverage on the ECM and related components.
This code has been reported in vehicles with advanced engine management systems, particularly those with VVL technology.
Moderate – While the vehicle may still be drivable, it is advised to address this issue soon to prevent potential engine damage.
Ignoring this code can lead to decreased engine performance and increased emissions, potentially violating emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The VVL actuator is typically located near the top of the engine, connected to the camshaft.
Q: Can I drive with a P105B code?
A: While you may be able to drive, it's not recommended as it can lead to further engine issues.
Q: What happens if I ignore this code?
A: Ignoring this code can result in reduced engine performance and increased fuel consumption.
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