Keep in mind there are 3 temp sensors.
The 3rd sensor for the gauge has a different ohm range than the other ones.
Swapping wires between T1 and T2 won't help with the gauge reading since
the gauge is wired to the 3rd one.

T1 and T2 are the fuel injection temp sensors and yes they are supposed
to have similar ohm readings at similar temps. T1 is for intake air temp
and lives inside the AFM.

For some years now aftermarket replacement gauge temp senders have read
higher than original senders did, at least the single wire threaded ones.

Mark

Thomas Casal wrote:
> Sweet!!! The world needs to know how crappy those temp sensors are a guy on
> fb was trying to tell people it’s the temp 2 sensor that’s causing the high
> reading. Tried to tell him it was the other temp sensor and he didn’t wanna
> hear me. Oh well.
>
> On Tue, Jun 1, 2021 at 11:59 PM Tom Neal <tneal4242@gmail.com> wrote:
>
....... Am
>> planning to temporarily “swap” temp sensors, t1 and t2, using jumpers since
>> the resistive element is supposed the be the same, and will probably find
>> they aren’t the same cold or at operating temp. A years long saga may be
>> coming to an end.  May put a resistor in series to get needle back just
>> under the LED. Super thanks.
>>
>> I posted a somewhat related item a while ago that adding a water pressure
>> gauge has been a very effective engine monitoring, disaster avoiding, and
>> troubleshooting tool. Tapped off the heater hose junction near the bottom
>> of the radiator with a flushing T.  A $100 pressure checker has helped to
>> find some of the 40 leaks over 34 years.
>>
>> JODTAA, (Just One Darn….)    Tom
>>
>> From:    Thomas Casal
>>> If you had your coolant temp gauge sensor replaced that may be the
>> reason for the high reading. The new sensors aren=E2=80=99t calibrated
>> right so they run high even though the vanagon is running at normal
>> temperature. Per Dennis I sourced the part luckily from VW….
>>
>