P0001 code - fuel volume regulator control - open circuit

[J88TEO]

One of my 2 ( left standing for almost 2 years ) has thrown up this code.
What does it mean?

[Ardent]

is your 2 a stock 2?

Not seeing that code listed against the 2

P0100 but not P0001

[J88TEO]

Stock 1zz 5 speed.

[Call the midlife!]

If it's been stood a while it could be that something has chewed the wiring on the top of the fuel tank...

[Carolyn]

The code list starts at 0100, as Ardent says: "Mass or volume airflow malfunction".  That indicates a problem with the MAF circuit.  A disconnect and good cleaning of the MAF and the connector contacts with contact cleaner would be my first stab at it.  Take the O ring off before you do it, as the solvent will destroy it.

[J88TEO]

Strange.....



Definitely says P0001 on the reader. Am scratching my head!

[Carolyn]

Strange.....

Definitely says P0001 on the reader. Am scratching my head!

Try a different code reader?  Torque Pro with a dongle?  Is the engine management light on?

[J88TEO]

Yes....
will borrow a different reader from my mate and see what code comes out.

[Alex Knight]

https://obd2pros.com/dtc-codes/p0001/

Fuel pressure regulator, fuel pump, or most likely, injector(s).

[Dev]

 Unfortunately and fortunately our cars fuel regulation has no sensor or control system.
 Its purely mechanical and if there is a fault in the fueling it is generally either a lean, rich or misfire.
 I think this is an interesting case non the less and another code reader is the best approach.
 
 A better question would be, how is the car running?

[Dev]

 If you have old fuel in the car I would recommend either draining the tank or if it has little fuel adding dryer into the tank to absorb the water and then add fuel to dilute the old.
I let me car sit for over 2 years, years ago with stabilizer which is only good for one year. I had misfires and codes that went away after adding fresh fuel. The car idled fine but when you opened the throttle a little it would sputter.

[Carolyn]

Unfortunately and fortunately our cars fuel regulation has no sensor or control system.
 Its purely mechanical and if there is a fault in the fueling it generally either a lean, rich or misfire.
 I think this is an interesting case non the less and another code reader is the best approach.
 
 A better question would be, how is the car running?

I agree.  I was pretty sure the pressure regulator was purely mechanical and there is no related sensor.  Stale fuel is a decent bet....

[Dev]

I agree.  I was pretty sure the pressure regulator was purely mechanical and there is no related sensor.  Stale fuel is a decent bet....

 I replace one during the time of trying to trouble shoot negative fuel trims. It sits on the fuel pump housing. It ended up being a MAF that has fallen out of calibration.
 These fuel pressure regulators are spring type that almost never wear out. Toyota keeps it dead simple unlike other manufactures.