Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
Your car's computer is having trouble learning how to adjust a part of the engine that helps it run smoothly.
The vehicle's Variable Valve Lift (VVL) system is not functioning correctly, specifically in its ability to learn and adjust the valve lift for optimal performance.
The P1024 code indicates a problem with the Variable Valve Lift (VVL) system's self-learning function on Bank 1. This system adjusts the lift of the engine's valves for better efficiency and performance. The code suggests that the system is unable to learn the correct lower range settings for the valve lift.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL actuator
• Wiring issues in the VVL system
• Malfunctioning engine control module (ECM)
VVL: Variable Valve Lift
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the VVL actuator and related wiring for damage.
• Test the ECM for proper function.
• Replace the faulty VVL actuator.
• Repair or replace damaged wiring.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance checks
• Timely replacement of worn components
• Ensure proper oil levels and quality
Engine Performance
• Avoid driving aggressively until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer for warranty coverage on engine components.
This code has been associated with VVL system issues in vehicles with advanced engine management systems.
Moderate – It is advisable to address this issue soon to avoid further engine performance problems.
Ignoring this code may lead to decreased fuel efficiency and potential engine damage.
• Engine at operating temperature
• Vehicle idling
The VVL actuator is typically located near the engine's cylinder head.
Q: Can I drive with a P1024 code?
A: It's possible to drive for short distances, but it's best to have it checked soon to avoid potential engine damage.
Q: What happens if I ignore this code?
A: Ignoring the code can lead to poor engine performance and reduced fuel efficiency.
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