Overheating of the Catalyst

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Spainal
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Overheating of the Catalyst

Post by Spainal » Sun Jul 04, 2021 4:45 pm

Hello everyone!
I ask for help, I have a Bulb with the name EXT on the Dashboard.
What is this indicator?
Overheating of the catalyst?
where does he get his data from?
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

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jamescarruthers
480 Is my middle name
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Joined: Mon Jul 07, 2003 3:19 pm
Location: Cambridge

Re: Overheating of the Catalyst

Post by jamescarruthers » Sun Jul 04, 2021 6:37 pm

Image
If you mean “EXT” as shown on the picture above of the Info Centre, you can relax, this is just the external temperature display. Green for selected to display on the Info Centre; red for the temperature being close to freezing (lower than 3 deg. C I seem to remember.


Image

On the above image, the top two circled items denote an overheated catalytic converter. I think the lower circled item illuminates if the emissions are out of the expected range
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

Spainal
Started learning about 480
Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
Location: Russia, Siberia, Krasnoyarsk
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Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 3:45 am

Hey!
Revised, there is an "EXH Temp" light above the info center
The location of the lamp from left to right of the speedometer.
Right turn, burnt out bulb, little fluid in the washer barrel, EXH Temp.
What does it mean ?!
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

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jamescarruthers
480 Is my middle name
Posts: 2501
Joined: Mon Jul 07, 2003 3:19 pm
Location: Cambridge

Re: Overheating of the Catalyst

Post by jamescarruthers » Mon Jul 05, 2021 5:39 am

Sounds like that is indeed the overheated exhaust or catalytic converter light by its position matching the symbol in the parts catalogue.
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

Spainal
Started learning about 480
Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
Location: Russia, Siberia, Krasnoyarsk
Contact:

Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 5:47 am

what sensor is responsible for the readings? didn't find it in the directory. Could you tell me the number of this part.
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

User avatar
jamescarruthers
480 Is my middle name
Posts: 2501
Joined: Mon Jul 07, 2003 3:19 pm
Location: Cambridge

Re: Overheating of the Catalyst

Post by jamescarruthers » Mon Jul 05, 2021 6:15 am

Do you actually have a Catalytic Converter on a 1989 car? I thought they weren’t fitted until later, however your car could have gotten it early if it was meant for a market with tighter emissions regulations (e.g. Japan or USA).

Can you post some pics of the car up?
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

Spainal
Started learning about 480
Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
Location: Russia, Siberia, Krasnoyarsk
Contact:

Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 8:00 am

Probably I can, since I reached 10 messages!
There is definitely a catalyst, but it was already knocked out by the old owner.
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

Spainal
Started learning about 480
Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
Location: Russia, Siberia, Krasnoyarsk
Contact:

Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 8:02 am

Right now, I’ll figure out how to insert pictures on the form, as I understand them, you need to upload them to a third-party resource and only insert links here, or are they uploaded to the forum?
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

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dragonflyjewels
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Re: Overheating of the Catalyst

Post by dragonflyjewels » Mon Jul 05, 2021 8:34 am

You need to host pictures elsewhere and post the link.
Sylvia

Snazzy - 1993 Paris Blue ES red dipstick 2.0i bought 2001
Lethal Lily - 1991 White Turbo
Paris the Unicorn - 1991 Paris Edition
hubby has
Sven - 1994 Racing Green GT
Evil Eva - 1992 Paris Blue Turbo

no previous 480s - can't bear to sell any

Spainal
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Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
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Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 8:40 am

jamescarruthers wrote:
Mon Jul 05, 2021 6:15 am
Do you actually have a Catalytic Converter on a 1989 car? I thought they weren’t fitted until later, however your car could have gotten it early if it was meant for a market with tighter emissions regulations (e.g. Japan or USA).

Can you post some pics of the car up?
Image
Here is the sensor that stood after the catalyst, well, it is folded, as we see the wires go to it in the zovodskie in the thermo-casing.

Image

Here is the catalyst itself with a lambda probe
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

User avatar
jamescarruthers
480 Is my middle name
Posts: 2501
Joined: Mon Jul 07, 2003 3:19 pm
Location: Cambridge

Re: Overheating of the Catalyst

Post by jamescarruthers » Mon Jul 05, 2021 9:09 am

Thanks. I thought 480s only had a Lambda sensor before the catalytic converter bit your car has two does it not? One after the cat also?

If your Cat is empty, it’s unlikely it is blocked and heating up so maybe you just have an indication problem? I’m sorry but I don’t know if the exhaust temperature is monitored by the Lambda sensor or a separate probe. However, looking at the parts catalogue it seems like the only sensor in the exhaust line is the Lambda sensor.

This is the Lambda sensor you should have:
https://www.rendcarparts.com/volvo/part ... RD3462685A

For B18FT engine:
- up to Chassis Number 590023: 3462685 or 3436465
- after Chassis Number 590024: 3474425

Looking at the link above, it is a 3 wire sensor probably one wire for signal (fluctuating voltage) and two wires for the built in heater. If your car has been starved of proper parts for many years, it may have a universal Lambda sensor installed, which is putting this light on the dashboard.

Can a proper car mechanic please tell us if the Exhaust Temperature light on a 480 dashboard indicates:
-1. Failed Lambda heating element
- 2. The exhaust is too hot
1987 Volvo 480 ES, 507274, 217 - Red (Ness)
2006 Citroen C6 Exclusive 3.0 petrol/LPG
2008 Mini Cooper convertible (Mau)

Previous 480's:
J123 CFU -- ES
J449 MNL -- ES auto
D864 CPV -- ES
L691 JFC -- Turbo
F70 MNR -- ES
H858 FGV -- Turbo auto
E981 KHM -- ES (509849)

Spainal
Started learning about 480
Posts: 90
Joined: Mon Mar 16, 2015 7:38 pm
Location: Russia, Siberia, Krasnoyarsk
Contact:

Re: Overheating of the Catalyst

Post by Spainal » Mon Jul 05, 2021 11:32 am

jamescarruthers wrote:
Mon Jul 05, 2021 9:09 am
Thanks. I thought 480s only had a Lambda sensor before the catalytic converter bit your car has two does it not? One after the cat also?

If your Cat is empty, it’s unlikely it is blocked and heating up so maybe you just have an indication problem? I’m sorry but I don’t know if the exhaust temperature is monitored by the Lambda sensor or a separate probe. However, looking at the parts catalogue it seems like the only sensor in the exhaust line is the Lambda sensor.

This is the Lambda sensor you should have:
https://www.rendcarparts.com/volvo/part ... RD3462685A

For B18FT engine:
- up to Chassis Number 590023: 3462685 or 3436465
- after Chassis Number 590024: 3474425

Looking at the link above, it is a 3 wire sensor probably one wire for signal (fluctuating voltage) and two wires for the built in heater. If your car has been starved of proper parts for many years, it may have a universal Lambda sensor installed, which is putting this light on the dashboard.

Can a proper car mechanic please tell us if the Exhaust Temperature light on a 480 dashboard indicates:
-1. Failed Lambda heating element
- 2. The exhaust is too hot
according to the diagrams, I should have a catalyst, behind it, as I understand it, there is some kind of temperature sensor according to the principles of a lambda probe or glow plug working on the principle of resistance, right now it is torn off and destroyed, only part of the case is screwed in, and the wires are hanging from it (2 pcs) ... if you close them, the lamp is on, and if you open them, it doesn’t light up, well, this is not exactly what I have forgotten, it was a long time ago.
Well, I'll soon assemble the engine, start it and look there, but the sensor is worth it for sure!
Volvo 480 Turbo!
I was born and live in Siberia! :hopping:

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