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 learning how to adjust the engine's valves on one side of the engine.
The VVL (Variable Valve Lift) system helps the engine adjust its valves for better performance. This code means the system is having trouble learning the correct settings for the valves on Bank 2 of the engine.
The P1027 code indicates a problem with the self-learning function of the Variable Valve Lift (VVL) system on Bank 2. This system is responsible for adjusting the valve lift for optimal engine performance. The code suggests that the system is unable to learn or adapt to the lower range of valve lift settings.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL actuator
• Wiring issues in the VVL circuit
• Faulty engine control module (ECM)
VVL: Variable Valve Lift
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the VVL actuator and wiring for damage.
• Test the ECM for faults.
• Replace the faulty VVL actuator.
• Repair or replace damaged wiring.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance of the VVL system
• Ensure proper oil levels and quality
• Regularly inspect engine wiring
Engine Performance
• Avoid hard driving until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
Check with your vehicle manufacturer as this may be covered under powertrain warranty.
This code has been associated with issues in vehicles with advanced variable valve timing systems, particularly in models from the early 2000s.
Moderate – It's important to address this issue to prevent further engine performance problems.
Driving with this code can lead to reduced performance and increased emissions. It is advisable to fix it promptly.
• Engine at operating temperature
• Vehicle in idle or low-speed conditions
The VVL actuator is typically located near the cylinder head on Bank 2 of the engine.
Q: Can I drive with a P1027 code?
A: It's possible, but not recommended as it can lead to reduced performance and potential engine damage.
Q: What is Bank 2?
A: Bank 2 refers to the side of the engine that does not contain cylinder 1. In V-type engines, it is one of the two cylinder banks.
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