Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble talking to a part that helps control how the engine breathes, kind of like when a friend doesn't answer your text messages.
The P1066 code indicates a problem with the communication between the vehicle's control modules regarding the Variable Valve Lift (VVL) system.
The P1066 code is triggered when the Engine Control Module (ECM) detects an issue with the CAN (Controller Area Network) message related to the Variable Valve Lift system. This could mean the message is missing, incorrect, or not received within the expected time frame.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Faulty VVL actuator
• Wiring issues in the CAN network
• Defective ECM or other control module
VVL: Variable Valve Lift
CAN: Controller Area Network
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors related to the VVL system.
• Test the VVL actuator and ECM for faults.
• Repair or replace faulty wiring or connectors.
• Replace the VVL actuator if defective.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• CAN bus diagnostic tool
$200 - $800
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance of the vehicle's electrical system.
• Ensure all software updates are applied.
• Check for recalls related to the CAN network.
Communication Issue
• Have the car inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
• Keep up with regular vehicle maintenance.
Check with the manufacturer for warranty coverage on the ECM and related components.
This code has been more prevalent in vehicles with complex electronic systems and CAN network communications.
Moderate – It is advisable to address this issue soon to avoid further engine performance problems.
Ignoring this issue could lead to increased emissions and reduced vehicle performance, which might not comply with local regulations.
• Vehicle at operating temperature
• Engine running
The VVL actuator is typically located on the cylinder head, near the camshaft.
Q: Can I drive with a P1066 code?
A: It's possible, but not recommended as it may lead to poor performance and increased emissions.
Q: How do I clear a P1066 code?
A: After fixing the issue, you can use an OBD-II scanner to clear the code.
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A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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