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 understanding the information from a sensor that helps control how the engine's valves open and close. It's like when you can't read a friend's handwriting.
The P1073 code indicates that the vehicle's Variable Valve Lift (VVL) sensors on Bank 1 are providing data that does not match expected values, causing the engine control module (ECM) to flag an error.
The VVL system adjusts the lift of the engine's intake valves to optimize performance and efficiency. When the ECM detects that the data from the VVL sensors on Bank 1 does not conform to expected parameters, it triggers the P1073 code. This can affect engine performance and efficiency.
• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty VVL sensor
• Wiring issues in the VVL sensor circuit
• ECM malfunction
VVL: Variable Valve Lift
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the VVL sensor and its wiring for damage.
• Test the VVL sensor for proper operation.
• Replace the faulty VVL sensor.
• Repair or replace damaged wiring.
• Reprogram or replace 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 oil levels
• Use quality engine oil
Sensor Issue
• Have the vehicle checked by a professional mechanic.
• Do not ignore the Check Engine Light.
• Keep up with regular vehicle maintenance.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code has been associated with issues in vehicles using advanced VVL systems, particularly in models from the early 2000s.
Moderate – It's important to address this issue to prevent further engine performance problems.
Driving with a malfunctioning VVL system can lead to increased emissions and potential safety issues.
• Engine at operating temperature
• Vehicle at idle
The VVL sensor is typically located near the top of the engine, attached to the cylinder head on Bank 1.
Q: Can I drive my car with a P1073 code?
A: It's not recommended to drive for extended periods with this code, as it can lead to reduced performance and efficiency.
Q: How do I reset the Check Engine Light after repairs?
A: You can use an OBD-II scanner to clear the code after repairs have been made.
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