Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the engine that helps control how air gets into the engine. It's not working the way it's supposed to.
The code P1031 indicates an issue with the Variable Valve Lift (VVL) actuator, which is responsible for adjusting the valve lift in the engine for optimal performance. The system is not recognizing the direction of rotation correctly.
P1031 is triggered when the Engine Control Module (ECM) detects that the VVL actuator on Bank 1 is not operating within the expected parameters. This could be due to a malfunction in the actuator itself or a problem with the sensors that monitor its position and movement.
• Check Engine Light is on
• Reduced engine performance
• Increased fuel consumption
• Faulty VVL actuator
• Wiring issues or poor electrical connections
• Defective position sensor
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 actuator's position sensor for proper operation.
• Replace the faulty VVL actuator.
• Repair or replace damaged wiring or connectors.
• Replace the defective position sensor.
• OBD-II scanner
• Multimeter
• Socket set
$200 - $600
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance and inspections
• Ensure proper oil levels and quality
• Check electrical connections periodically
Engine Performance
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid hard driving until the issue is resolved.
Check with your vehicle manufacturer for specific warranty coverage related to the VVL actuator.
This code has been associated with vehicles that utilize advanced valve timing systems for improved efficiency and performance.
Moderate – While the vehicle may still operate, performance and fuel efficiency may be affected.
Driving with a malfunctioning engine component can lead to further damage and may not comply with emissions regulations.
• Engine running
• Use of diagnostic tools
The VVL actuator is typically located on the cylinder head of the engine, near the camshaft.
Q: Can I drive with a P1031 code?
A: It's possible, but not recommended as it may lead to reduced performance and increased fuel consumption.
Q: How serious is a P1031 code?
A: It's moderately serious and should be addressed to ensure optimal engine performance.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.