Oil level/pressure BX1.9TRS

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Gordon
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Oil level/pressure BX1.9TRS

Post by Gordon »

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
1948 Light15
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 »

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 »

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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Posts: 38
Joined: Fri Apr 13, 2007 10:40 am
Location: Whangarei, New Zeakand

Re: Oil level/pressure BX1.9TRS

Post by Gordon »

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 »

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.

2004 Citroën Xsara Desire. (Now gone).

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

Post by Tim Leech »

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
2003 Rover 25 1.6i XL 5 DR

bowei001
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Re: Oil level/pressure BX1.9TRS

Post by bowei001 »

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

Gordon
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Re: Oil level/pressure BX1.9TRS

Post by Gordon »

Thanks Tim and David for your comments. Previously the oil gauge gave the level reading, then the backlight went out, and I understood that the indicator position then gave a relative indication of pressure - not a graduated scale as for GTI but the indicator position never cut out and went to the "zero" position ( certainly possible that I'm mistaken, but as the indicator was to the right of the dial and didn't fall to "zero" on the left I assumed it gave a relative pressure although no scale present ) with a low pressure red light warning. Admittedly after the oil level backlight went out I've seen the indicator position sometimes in different positions on the scale but it didn't cut out after ignition started or after 30 seconds. Now the backlight to the level measurement doesn't go out at all.
Gordon
1948 Light15
1966 ID19
1991 BX 1.9GTi 4x4
1994 Xantia 2.0SX

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Tim Leech
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Posts: 15309
Joined: Tue Apr 15, 2008 11:12 am
Location: Burton on Trent
My Cars: 1963 VW BEETLE 1200 KGJ413A
1979 Rover SD1 3.5 V8-S TSL 982
1980 Morris Marina 1.7HL DBV468W
1985 CITROEN BX 19DTR C943DYA (again)
1985 CITROEN BX 19GT C1TBX
1991 CITROEN BX 19TZI AUTO A/C BXi 19
1994 CITROEN XANTIA 1.8 SXi M908HRY
x 99

Re: Oil level/pressure BX1.9TRS

Post by Tim Leech »

Hi Gordon

The only measurement it gave then is just level, it sounds like maybe the sender unit is now faulty (not uncommon), I had a BX 16 Athena which never worked, it lit up but the gauge never moved.
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
2003 Rover 25 1.6i XL 5 DR