# Oil temp not working correctly
**URL:** https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774
**Category:** V3 SOFTWARE
**Created:** [July 7, 2024, 12:01pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774 "2024-07-07T12:01:08Z")
**Posts on this page:** 12
**Page:** 1
### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 7, 2024, 12:01pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/1 "2024-07-07T12:01:08Z")
Hi,
since moving to V3 (3.030) my ECU master oil temp sensor no longer works correctly. It shows -26 when connected (16c ambient temp) but does change to 100c once I unplug it. It’s connected to pin B17. Also I’ve noticed the cal isn’t the same as in the old V2 software (cal was inputted as per instructions that the sensor came with) I used the sensor wizard to do the cal in V3. Maybe I’m doing something wrong but I don’t understand why there is a difference between the 2 calibrations if ECU master themselves supplied the information and built the software.
[20240706\_2055\_28\_GEAR\_UPDATE.emub3](https://community.ecumaster.com/uploads/short-url/vbooQixNUAhAaF5sYvyVVWsxH0f.emub3) (57.2 KB)
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### Author:  [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)
#### Post date: [July 7, 2024, 11:18pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/2 "2024-07-07T23:18:03Z")
I’ve tested and everything works as expected.
Are you sure you enter proper data into wizard ?
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### Author:  [@yotam](https://community.ecumaster.com/u/yotam)
#### Post date: [July 8, 2024, 4:48pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/3 "2024-07-08T16:48:22Z")
Maybe you haven’t set the pull up correctly, make sure the pull up.value is the same that you are using.
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### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 10, 2024, 5:46pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/4 "2024-07-10T17:46:16Z")
Yes I agree the pull-up is possibly wrong but isn’t the idea of having sensor wizard is that it does everything for you? I shouldn’t have to change any settings.
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### Author:  [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)
#### Post date: [July 10, 2024, 7:51pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/5 "2024-07-10T19:51:13Z")
The pullup value depends on user. You should select 330R as advised in manual, but this value depends on your goal (the best precision range) the and the pullup can vary.
Also the default pullup value is the internal EMU pullup what is used form most temperature sensor.
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### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 10, 2024, 8:08pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/6 "2024-07-10T20:08:42Z")
So why does it still read -25 and 100 when disconnected?
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### Author:  [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)
#### Post date: [July 10, 2024, 8:11pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/7 "2024-07-10T20:11:38Z")
100 is fail safe value. When the sensor is broken or disconnected there must be predictable value to be able to continue driving.
> [@Wtd](#):
>
> So why does it still read -25 and 100 when disconnected?
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### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 10, 2024, 8:16pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/8 "2024-07-10T20:16:44Z")
Yes I understand that’s the default value but why does it read -25 when the sensor is at 15c after using the wizard
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### Author:  [@Jadzwin\_ECUMASTER](https://community.ecumaster.com/u/Jadzwin_ECUMASTER)
#### Post date: [July 10, 2024, 8:21pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/9 "2024-07-10T20:21:38Z")
You entered something wrong in the wizard.
I’ve checked it and everything works as expected.
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### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 10, 2024, 10:22pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/10 "2024-07-10T22:22:34Z")
So if the 330R pull-up is the default resistance for this sensor why does the software wizard not enter this automatically? Because the value I get each time is 2200.
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### Author:  [@Greg](https://community.ecumaster.com/u/Greg)
#### Post date: [July 11, 2024, 7:14am UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/11 "2024-07-11T07:14:56Z")
Look like you don’t understand pull-up role … pullup firstly is depending of the sensor and expected mor important temperature to have better resolution on given temperature area so in case of ecumaster sensor if used for oil I’m usin 330 pullup to have nice good resolution on higher temperatures - reason i don’t care if sensor reads less accurately on lower temperatures… but for example if I’m using the same sensor for coolant temp I’m using 1k pullup to have nicer reading on working temperature for clt or power steering like on the photo below
compare curves below the same sensor different pullup
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### Author:  [@Wtd](https://community.ecumaster.com/u/Wtd)
#### Post date: [July 11, 2024, 8:54pm UTC](https://community.ecumaster.com/t/oil-temp-not-working-correctly/1774/12 "2024-07-11T20:54:39Z")
After changing the wizard’s default 2200 ohm resistance setting for oil temp cal to 330 ohm the sensor now reads correctly. Personally I feel the wizard should input the default 330R for the oil temp sensor automatically. Anyway thanks for the help.