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 not getting the right messages about how to adjust the engine's timing on one side of the engine.
The code P1039 indicates a communication timeout issue between the Variable Valve Lift (VVL) system and the Variable Valve Timing (VVT) system on Bank 2, which is one side of the engine.
The P1039 code is triggered when the Engine Control Module (ECM) detects a timeout in the Controller Area Network (CAN) communication for the VVT Desired Message on Bank 2. This means that the ECM is not receiving the expected data from the VVL system to adjust the valve timing appropriately.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL actuator
• Wiring or connection issues in the CAN bus
• Faulty ECM
VVL: Variable Valve Lift
VVT: Variable Valve Timing
ECM: Engine Control Module
CAN: Controller Area Network
• Perform a visual inspection of the wiring and connectors related to the VVL and VVT systems.
• Use an OBD-II scanner to check for additional codes and freeze frame data.
• Test the VVL actuator and related components for proper operation.
• Repair or replace faulty wiring or connectors.
• Replace the VVL actuator if found defective.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Diagnostic software
$200 - $800
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance of the engine and its components.
• Ensure proper connections and wiring integrity.
• Update ECM software as recommended by the manufacturer.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle aggressively until repaired.
Check with the vehicle manufacturer for specific warranty coverage related to the engine control system.
This code has been associated with communication issues in vehicles with advanced engine management systems, particularly those with VVL and VVT technologies.
Moderate – It's important to address this issue to prevent potential engine performance problems.
Driving with a malfunctioning engine control system can lead to increased emissions and potential safety risks.
• Engine at operating temperature
• Vehicle in a controlled environment
The VVL actuator is typically located near the top of the engine on Bank 2, which is the side of the engine opposite to Bank 1.
Q: Can I drive with a P1039 code?
A: It's not recommended to drive for extended periods with this code, as it can affect engine performance and efficiency.
Q: How can I reset the Check Engine Light?
A: You can reset the light using an OBD-II scanner after addressing the underlying issue.
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.