Fuel volume regulator on a 2002 Toyota Sienna 3.0 V6

Maintenance/Repairs
1

Where is it? On the engine? In the gas tank?

2

Seems like it is in the gas tank.

3

I’m not seeing any reference to a part by that name for this vehicle. OP, suggest to tell us more what got you started on this path? Was there a check engine light & diagnostic code?

Is it possible you mean “fuel pressure regulator”?

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4

If you mean the fuel pressure regulator, it’s on the fuel pump assembly.

fuel pump
fuel pump1056Ă—1228 46.6 KB

Tester

5

Your fuel volume regulator is at the end of your right leg, just below the ankle.

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6

lol … Maybe OP is referring to the parts that prevent the gas tank from being over-filled?

Fuel Tank Overfill Check Valve for Toyota Sienna 01-03 Lexus IS300 01-05 L6 3.0L | eBay

7

Or the OP May mean the sending unit for the fuel gauge

Fuel Level Sending Unit - Repair or Replace
A failed or malfunctioning fuel level sender can cause the gas gauge in your 2002 TOYOTA SIENNA to be inaccurate or read empty or E despite the fuel level

IMG_2406

8

Great diagram. Thank you. You are probably right. My diagnostic tool gave me an error code of P0003, defined as a “Fuel Volume Regulator Control Circuit Low”.

9

That is an inaccurate or erroneous fault. Fuel flow control valves are used on newer vehicles, not yours.

10

My diagnostic tool gave me an error code of P0003, defined as “Fuel Volume Regulator Control Circuit Low”. I also had misfire codes on multiple cylinders. The engine runs rough. The exhaust is smokier and smellier than usual. Check engine light comes on and flashes at times. Any suggestions?

11

A flashing Check Engine light indicates a major misfire is occurring.

This can lead to catalytic converter/engine damage if the vehicle is operated with a flashing Check Engine light.

Tester

12

Take it to someone that knows what they are doing.

13

As mentioned above, this code wouldn’t normally apply for a 2002 Sienna 3.0L. Are you certain the code isn’t actually P2A03? Or P0303?

There may be some sort of software issue with the scan tool you are using. Suggest to take your car to a shop for a pro-assessment, at least to the point you have an accurate assessment of the diagnostic codes. Once you have that, post them here for more ideas.

Again as mentioned above, if CEL is flashing, probably best for your wallet to not run the engine, as you probably have a misfire. That means the fuel/air mixture is not igniting properly for at least one cylinder. The result is a poor running engine & raw gasoline forced into the catalytic converter, which will eventually damage it, and require a expensive repair.

The pro’s diagnose & repair misfire problems all the time. A good shop should be able to figure this out straight away, but expect a good-size invoice. The common causes for misfires:

  • Spark plugs
  • Coil packs
  • Fuel pressure
  • Air leaks
  • Internal engine problems
14

Thank you.

15

You are welcome, best of luck. Car not working, very frustrating for the owner.