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 of the engine that controls how the valves open and close. It's like when two friends are trying to talk on the phone, but the call keeps dropping.
The code indicates an issue with the communication between the vehicle's control module and the Variable Valve Lift (VVL) system on Bank 2. The control module is not receiving the expected messages.
P1038 is triggered when the Engine Control Module (ECM) detects an error in the communication with the Variable Valve Lift (VVL) system on Bank 2 via the Controller Area Network (CAN). This could be due to a faulty message or a lack of communication.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Engine misfire
• Unusual engine noises
• Faulty VVL actuator
• Wiring issues in the CAN bus
• Faulty ECM or control module
• Software issues within the ECM
• Poor electrical connections
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 for the VVL system.
• Check for any software updates for the ECM.
• Test the VVL actuator for proper operation.
• Inspect the CAN bus for communication issues.
• Repair or replace faulty wiring or connectors.
• Replace the VVL actuator if found faulty.
• Update the ECM software if necessary.
• Repair or replace the ECM if it is faulty.
• Ensure all electrical connections are secure.
• OBD-II scanner
• Multimeter
• Diagnostic software
• Basic hand tools
• CAN bus tester
$200 - $800
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance and inspection of electrical systems.
• Ensure ECM software is up to date.
• Avoid harsh driving conditions that may affect wiring.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved.
• Keep up with regular maintenance to prevent future issues.
Check with the vehicle manufacturer for warranty coverage on the ECM and VVL system.
This code has been reported in vehicles with complex valve control systems, especially those using CAN communication for engine management.
Moderate – It is advisable to address this issue soon to avoid further engine performance problems.
Driving with a malfunctioning VVL system can lead to reduced performance and increased emissions, which may not comply with legal standards.
• Engine at operating temperature
• Vehicle in a safe environment for testing
The VVL actuator is typically located on the cylinder head, near the intake or exhaust valves of Bank 2.
Q: What does Bank 2 mean?
A: Bank 2 refers to the side of the engine opposite to Bank 1, which is the side with cylinder 1.
Q: Can I drive with this code?
A: It's not recommended to drive for extended periods with this code, as it may lead to reduced performance and potential engine damage.
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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.
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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.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.