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 the car's computer is having trouble talking to a part that helps control how much air goes into the engine. It's like when your computer can't find the mouse.
The P1012 code indicates that the Variable Valve Lift (VVL) reference sensor solenoid is not functioning properly on Bank 1 of the engine.
The VVL system is designed to optimize engine performance and efficiency by varying the lift of the engine's intake valves. The reference sensor solenoid is responsible for providing feedback to the engine control module (ECM) regarding the position of the VVL components. A loss of signal or improper function in this solenoid can lead to the P1012 code being triggered.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL reference sensor solenoid
• Wiring issues such as broken wires or poor connections
• Faulty ECM
VVL: Variable Valve Lift
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the P1012 code.
• Inspect the wiring and connectors related to the VVL reference sensor solenoid.
• Test the VVL reference sensor solenoid for proper operation.
• Replace the faulty VVL reference sensor solenoid.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance and inspection of engine components.
• Ensure wiring and connectors are in good condition.
• Use quality engine oil to prevent sludge buildup.
Sensor Issue
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid hard driving until the issue is resolved.
Check with the vehicle manufacturer for specific warranty coverage on engine components.
This code has been reported in vehicles with advanced valve timing systems, particularly in models with higher mileage.
Moderate – It should be addressed soon to prevent potential engine performance issues.
Driving with a malfunctioning engine component can lead to increased emissions and may not comply with local regulations.
• Engine at operating temperature
• Vehicle at idle and under load conditions
The VVL reference sensor solenoid is typically located near the cylinder head on Bank 1 of the engine.
Q: Can I drive my car with a P1012 code?
A: While you may be able to drive the car, it's not recommended as it can lead to reduced performance and efficiency.
Q: How can I prevent a P1012 code?
A: Regular maintenance and ensuring all engine components are in good condition can help prevent this code.
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.