The 2006 Infiniti G35 is known to experience fuel level sensor problems, which can cause inaccurate fuel gauge readings. This issue is common across the VQ platform and can be frustrating for owners. Let's explore the causes and solutions for this problem.

Symptoms

The main symptoms of a faulty fuel level sensor in a 2006 Infiniti G35 include:

  • Fuel gauge reading full when the tank is nearly empty
  • Fuel gauge showing empty when there's fuel in the tank
  • Check Engine Light (CEL) illuminated with code P0462
  • Inconsistent or erratic fuel level readings

Causes

The primary causes of fuel level sensor issues in the G35 are:

  • Carbon buildup on the fuel level sensor contacts
  • Damaged or faulty sending units
  • Worn-out fuel pump assembly
  • Electrical connection problems
  • Faulty gauge cluster

Fuel Level Sensor Location

The 2006 Infiniti G35 has two fuel level sensors:

1. Driver's side: A sending unit for the float arm

2. Passenger's side: Part of the fuel pump assembly, including a float arm

Both units work together to provide accurate fuel level readings to the instrument cluster.

DIY Fix

For those comfortable with car maintenance, here's a step-by-step guide to addressing the fuel level sensor issue:

1. Disconnect the battery negative terminal

2. Remove the rear seat cushion

3. Locate the access panels for both fuel level sensors

4. Remove the access panels (typically secured by 8 bolts)

5. Disconnect the electrical connectors and fuel lines (be cautious of fuel spray)

6. Remove the fuel level sensors from the tank

7. Clean the sensors thoroughly using isopropyl alcohol and a Q-tip

8. Pay special attention to the graph-like scale where the arm meets the assembly

9. Inspect the O-rings and replace if necessary

10. Carefully reinstall the sensors, ensuring proper alignment

11. Reconnect all electrical connections and fuel lines

12. Replace the access panels and rear seat cushion

13. Reconnect the battery

Professional Repair

If the DIY approach doesn't solve the issue, consider these professional repair options:

  • Replace both fuel sending units: This is often the most effective solution, costing around $250 for parts
  • Check the Climate Control Temperature Module: In some cases, this module can affect fuel gauge readings
  • Inspect and repair the gauge cluster: Sometimes, resoldering connections in the instrument cluster can fix the problem

Prevention

To prevent future fuel level sensor issues:

  • Use high-quality fuel from reputable stations
  • Avoid running the tank too low on fuel regularly
  • Perform regular maintenance as recommended by Infiniti

Conclusion

Fuel level sensor problems in the 2006 Infiniti G35 can be frustrating but are often fixable. Whether you choose the DIY route or professional repair, addressing this issue will ensure accurate fuel level readings and prevent unexpected empty tanks.

FAQs About 2006 Infiniti G35 Fuel Level Sensor

    • How often should I replace the fuel level sensor?
      There's no set interval, but replacement is typically needed when symptoms occur, often around 100,000-150,000 miles.
    • Can I drive with a faulty fuel level sensor?
      While possible, it's not recommended as you risk running out of fuel unexpectedly.
    • Will a faulty sensor affect my car's performance?
      Generally, it only affects the fuel gauge reading, not the engine's performance.