The high and low pressure sensors have different switch operation. Low
is normally closed, opening with adequate pressure. High is normally
open, closing with adequate pressure. If two high pressure sensors were
used, response would be as follows"
Engine off, oil light off,
Engine on, light would be flashing as soon as pressure is made.
Engine over 2,200 rpm, Light still flashing.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf
Of jimt
Sent: Sunday, December 12, 2004 5:26 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: 2.1L Engine: Oil Pressure Senders faulty reading

On 12/12/04 2:59 PM, "Detroit Bus" <detroit.bus@GMAIL.COM> wrote:

> Returning to my mechanic, I suggested that either he had (a) switched
> the high and low pressure senders, (b) installed two of the same type,
> or (c) one or both of the new senders was defective. He will take a
> look tomorrow and probably end up ordering two OEM dealer senders
> (probably should have done that in the first place...).
>
> Are there any guesses or advice on which sender is bad, or anything
> else that might be the problem?
I have seen this problem with two of your options.
One of them is the reversed senders.
The other is two of the upper senders were used.

Assuming the circuit was the same as on jetta/passat et al.

jimt