• Check Engine Light illuminated
• Reduced engine performance
• Poor fuel efficiency
• Faulty VVL reference sensor
• Wiring issues or poor connections
• ECM software or hardware malfunction
VVL: Variable Valve Lift
ECM: Engine Control Module
• P1067
• P1070
VVL Reference Sensor Reset Error (Bank 2)
The car's computer is having trouble understanding a signal from a sensor that helps control the engine's valves on one side of the engine.
The Variable Valve Lift (VVL) system uses sensors to monitor and adjust the engine's valve operation. This code indicates a problem with the sensor on Bank 2, which is the side of the engine that does not contain cylinder 1.
P1068 is triggered when the Engine Control Module (ECM) detects an issue with the reset signal from the VVL reference sensor on Bank 2. This sensor is critical for accurately adjusting the valve lift, which impacts engine performance and efficiency.
• Use an OBD-II scanner to confirm the code
• Inspect the VVL reference sensor and its wiring
• Test the sensor's output and continuity
• Replace the faulty VVL reference sensor
• Repair or replace damaged wiring
• Update or reprogram the ECM if necessary
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Nissan Altima
• Infiniti G35
• Nissan Maxima
• Regular maintenance checks
• Ensure proper sensor installation
• Avoid harsh driving conditions
Sensor Issue
• Have the vehicle inspected by a professional
• Avoid long trips until the issue is resolved
Check with the vehicle manufacturer for possible warranty coverage on engine sensors.
P1068 is commonly reported in vehicles with advanced variable valve timing systems, particularly in models from the early 2000s.
Moderate – It is advisable to address this issue soon to prevent further engine performance problems.
Driving with this code may lead to increased emissions and reduced engine performance, which could be unsafe.
• Engine at operating temperature
• Vehicle in idle or low-speed conditions
The VVL reference sensor for Bank 2 is typically located on the cylinder head of the engine opposite the side containing cylinder 1.
Q: Can I drive with a P1068 code?
A: It's not recommended, as it may lead to poor engine performance and increased emissions.
Q: How can I reset the P1068 code?
A: After repairs, an OBD-II scanner can be used to clear the code, but the underlying issue must be fixed first.
