Oil level/pressure BX1.9TRS

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Gordon
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Oil level/pressure BX1.9TRS

Post by Gordon » Tue Nov 19, 2019 11:01 pm

Hi, the oil level and pressure is a combination gauge. On turning on ignition the level is shown, but on starting the car the backlight stays on. I've fitted a replacement pressure sensor but same thing happens. On driving the oil pressure warning red light doesn't come on. Any suggestions please.
Thanks.
Gordon
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1966 ID19
1991 BX 1.9GTi 4x4
1994 Xantia 2.0SX

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Jaba
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Re: Oil level/pressure BX1.9TRS

Post by Jaba » Wed Nov 20, 2019 10:38 am

There is a timer control unit plugged onto the rear of the gauge on the dash panel. Sounds like this has failed or has become unplugged or is not getting voltage or a signal from the pressure sensor. Try replugging all of the connectors to the dash first.

As BX problems go this is a minor one...........
The Joy of BX with just one Citroën to my name now. Will I sing Bye Bye to my GTI or will it be Till death us do part.

Gordon
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Re: Oil level/pressure BX1.9TRS

Post by Gordon » Thu Nov 21, 2019 8:19 pm

Thanks Jaba, I'll give it a try and let you know how I get on.
Gordon
1948 Light15
1966 ID19
1991 BX 1.9GTi 4x4
1994 Xantia 2.0SX

Gordon
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Joined: Fri Apr 13, 2007 10:40 am
Location: Whangarei, New Zeakand

Re: Oil level/pressure BX1.9TRS

Post by Gordon » Fri Nov 22, 2019 4:55 am

Took out the dash facia, no obvious problem and changing to a replacement instrument facia still didn't fix the issue. Changed the oil level measurement gauge without any impact. Oil level back light staying on presumably not switching over to pressure measurement.
Gordon
1948 Light15
1966 ID19
1991 BX 1.9GTi 4x4
1994 Xantia 2.0SX

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David
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Re: Oil level/pressure BX1.9TRS

Post by David » Sat Nov 23, 2019 11:04 pm

From my understanding, you have a problem with the circuit board behind the instrument panel. The rest of the circuit is fairly straight forward and in general there is nothing to go wrong. There is just the two sensors on the engine (the level sensor & the actual pressure sensor) & the 3 connecting wires; which all go to the instrument panel. The Pressure sensor wire goes to the 2nd pin of plug 4 (if I remember correctly) that goes into the back of the actual instrument panel, & the other 2 from the level sensor go to the 2 pins inside the 3 pin connector into the back of the suspected circuit board (the 3rd being ignition live).

I had a fault with mine, and in the end I removed the level part of the gauge as it tends to be unreliable anyway & just wired it to just show the pressure, using a basic BX PCB & another fuel gauge clock in the place of the oil clock instead of the oil gauge clock itself.

I also removed the sensor from the engine & just put a blanking plug in the level sensor hole as per the basic BX's

Hope that helps.
1992 Citroën BX 1.9 Diesel Meteor 4x4 - The Project.

1992 Citroën BX 1.9 TXD (with GTI engine; Mulleys old car) - Parts car.

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Tim Leech
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Re: Oil level/pressure BX1.9TRS

Post by Tim Leech » Sun Dec 01, 2019 10:55 am

I’m sure that no TRS has a pressure gauge fitted, only GTi etc, when you start the car the gauge should give a level readying for a few seconds then go off again.
1963 VW BEETLE 1200
1985 BX 19GT Mk1
1985 BX 19 DTR Mk1
1991 BX 19TZI Auto A/C
1994 Xantia 1.8i SX
1972 Morris Marina 1.8 SDL
1979 Rover SD1 V8-S
1980 Morris Marina 1.7 HL
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bowei001
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Re: Oil level/pressure BX1.9TRS

Post by bowei001 » Sun Dec 01, 2019 11:21 am

Our TRS (1986 Mk1) works the way that Tim said, no pressure gauge, only a level gauge.