• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL solenoid
• Wiring issues such as shorts or open circuits
• Faulty ECM
VVL: Variable Valve Lift
ECM: Engine Control Module
• P1046
• P1048
VVL Control Circuit High (Bank 1)
This code means that there is a problem with the system that controls how much the engine's valves open and close. It's like a light switch that's stuck in the 'on' position when it shouldn't be.
The P1047 code indicates that the Variable Valve Lift (VVL) control circuit on bank 1 is experiencing a high voltage condition.
The Variable Valve Lift (VVL) system is designed to optimize engine performance by adjusting the lift of the engine's valves. The control circuit for this system is monitored by the Engine Control Module (ECM). When the ECM detects a voltage level higher than expected in the VVL control circuit for bank 1, it triggers the P1047 code.
• Use an OBD-II scanner to confirm the code.
• Inspect the VVL solenoid and its wiring for damage.
• Check the voltage and continuity in the VVL circuit.
• Replace the faulty VVL solenoid.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance of the engine and its components.
• Ensure proper oil levels and quality.
• Regularly inspect electrical connections and wiring.
Engine Performance
• Do not ignore the Check Engine Light.
• Seek professional diagnostic services if unsure.
• Avoid driving aggressively until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code is commonly associated with Nissan and Infiniti vehicles equipped with VVL systems.
Moderate – While the vehicle may still be drivable, it is recommended to address the issue to prevent further engine performance problems.
Driving with a Check Engine Light on may lead to further damage or emissions violations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The VVL solenoid is typically located on the cylinder head of the engine, near the camshaft.
Q: What does VVL mean?
A: VVL stands for Variable Valve Lift, a system that adjusts the lift of the engine's valves to improve performance and efficiency.
Q: Can I drive with a P1047 code?
A: While the vehicle may still be drivable, it's best to address the issue to avoid potential engine performance problems.
