Check engine light symbol why?
Check engine light symbol why?
Author
Discussion

LivLL

Original Poster:

12,086 posts

219 months

Tuesday 20th May 2025
quotequote all


How in the heck is this a useful symbol for the average driver to warn them of an engine issue?

It’s difficult to describe, hard to search for if you don’t know what it is and doesn’t convey anything to a driver that might be useful.

I know what it means although I really can’t recall when it came into common use. My current car has a digital dash that gives clear pictorial and image warnings for most faults yet it still has a led backlight check engine light.

Has the time come to retire this stupid symbol and just give drivers a more clear warning?

EV drivers - FRO by the way.

Any cars out there that have better symbology?

Rant comes from a family friend phoning this morning to describe a “teapot shaped orange light” on her dash asking what to do. Thank god for smartphones as a photo made it clear to me.

Every day a journey

2,650 posts

60 months

Tuesday 20th May 2025
quotequote all
I think they’re useful.

My old man’s car also has a warning light for when he needs a poo.



14

2,292 posts

183 months

Tuesday 20th May 2025
quotequote all
LivLL said:


How in the heck is this a useful symbol for the average driver to warn them of an engine issue?

It’s difficult to describe, hard to search for if you don’t know what it is and doesn’t convey anything to a driver that might be useful.

I know what it means although I really can’t recall when it came into common use. My current car has a digital dash that gives clear pictorial and image warnings for most faults yet it still has a led backlight check engine light.

Has the time come to retire this stupid symbol and just give drivers a more clear warning?

EV drivers - FRO by the way.

Any cars out there that have better symbology?

Rant comes from a family friend phoning this morning to describe a “teapot shaped orange light” on her dash asking what to do. Thank god for smartphones as a photo made it clear to me.
Well since there could be a huge list of things that could be the problem when the engine management light comes on, it’s cheaper for manufacturers to use a symbol and also most drivers still wouldn’t know what’s wrong if the dash displayed a code and a description of what that code is. For an example my car recently had its engine management light come on for low pressure fuel system circuit high. How would the average driver know what that meant?

Dapster

8,699 posts

202 months

Tuesday 20th May 2025
quotequote all
LivLL said:


How in the heck is this a useful symbol for the average driver to warn them of an engine issue?

It’s difficult to describe, hard to search for if you don’t know what it is and doesn’t convey anything to a driver that might be useful.

I know what it means although I really can’t recall when it came into common use. My current car has a digital dash that gives clear pictorial and image warnings for most faults yet it still has a led backlight check engine light.

Has the time come to retire this stupid symbol and just give drivers a more clear warning?

EV drivers - FRO by the way.

Any cars out there that have better symbology?

Rant comes from a family friend phoning this morning to describe a “teapot shaped orange light” on her dash asking what to do. Thank god for smartphones as a photo made it clear to me.
Same here

My wife called me once saying a strange light was showing on the dash, and asked what to do. There then followed a 5 minute game of telephone charades as she described the check engine light variously as a trumpet, box with a line on it, funny shaped house.... etc....etc.

Citroen had it right 40 years ago - if there is a problem, "STOP". Typical French nuttiness though, the other symbols are unfathomable gibberish!!


Dracoro

8,969 posts

267 months

Tuesday 20th May 2025
quotequote all
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.

Studio263

94 posts

26 months

Tuesday 20th May 2025
quotequote all
Dapster said:
Citroen had it right 40 years ago - if there is a problem, "STOP". Typical French nuttiness though, the other symbols are unfathomable gibberish!!

When I had a GS I had to ask what the 3rd light on the left in your picture meant (the picture is of a CX dash but the GS has the same symbol). Its the oil in the torque converter overheating - C-Matic transmission only. Fine, but they could have blanked it off in manual cars...

murphyaj

1,254 posts

97 months

Tuesday 20th May 2025
quotequote all
Dracoro said:
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.
So the average driver needs to take it to the dealer and pay them to plug in their diagnostic kit.

Monkeylegend

28,327 posts

253 months

Tuesday 20th May 2025
quotequote all
Dracoro said:
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.
My BMW has this accessed via the iDrive menu.

Riley Blue

22,863 posts

248 months

Tuesday 20th May 2025
quotequote all


Ford 'Service due' light isn't it?


ARHarh

4,892 posts

129 months

Tuesday 20th May 2025
quotequote all
If its anything like the car that was in for an MOT before mine telling the owner what it meant would be pointless. The car in before mine had "brake light malfunction" or similar on the dash, the tester when explaining why the car had failed its MOT, the owner said "oh I wondered what that meant, its been showing that for months" A new bulb, 3 new tyres and some windscreen wipers and he will be able to get a pass.

DKS

1,838 posts

206 months

Tuesday 20th May 2025
quotequote all
I think there's an international standard of symbols that almost all manufacturers adhere to. I pondered the same thing when I noticed power symbols are are very similar, and why does a circle with a vertical line mean power?

kambites

70,616 posts

243 months

Tuesday 20th May 2025
quotequote all
Never really thought about it before but it's an odd one isn't it. I'm not sure you could make a simplistic outline shape which "looks like an engine", and even if you could I suspect the huge majority of car drivers don't actually know what an engine looks like anyway so it wouldn't be very helpful... but that symbol seems to be about the worst of all worlds.

Without the funny line across the top you could argue it looks a bit like an old longitudinal engine with a mechanical fan (with the gearbox removed and the flywheel showing), but if that's the intention I can't imagine what the bar across the top is meant to represent.

Doofus

32,824 posts

195 months

Tuesday 20th May 2025
quotequote all
Dapster said:
Citroen had it right 40 years ago - if there is a problem, "STOP". Typical French nuttiness though, the other symbols are unfathomable gibberish!!

Hydropneumatic steering and brakes meant that an engine problem could be very serious. "Check engine" is a suggestion, "STOP" isn't. smile

jeremyc

26,976 posts

306 months

Tuesday 20th May 2025
quotequote all
kambites said:
Without the funny line across the top you could argue it looks a bit like an old longitudinal engine with a mechanical fan (with the gearbox removed and the flywheel showing), but if that's the intention I can't imagine what the bar across the top is meant to represent.
'Pancake' air filter housing presumably.


kambites

70,616 posts

243 months

Tuesday 20th May 2025
quotequote all
jeremyc said:
Pancake' air filter housing presumably.
Ahh, maybe, yes.

Jader1973

4,806 posts

222 months

Tuesday 20th May 2025
quotequote all
DKS said:
I think there's an international standard of symbols that almost all manufacturers adhere to. I pondered the same thing when I noticed power symbols are are very similar, and why does a circle with a vertical line mean power?
ISO 2575

Gad-Westy

16,139 posts

235 months

Tuesday 20th May 2025
quotequote all
Monkeylegend said:
Dracoro said:
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.
My BMW has this accessed via the iDrive menu.
To get actual fault codes or just generic messages like 'drivetrain error' etc? I have to plug in my F11 to read actual codes. Don't think I've seen a car that doesn't.

Monkeylegend

28,327 posts

253 months

Tuesday 20th May 2025
quotequote all
Gad-Westy said:
Monkeylegend said:
Dracoro said:
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.
My BMW has this accessed via the iDrive menu.
To get actual fault codes or just generic messages like 'drivetrain error' etc? I have to plug in my F11 to read actual codes. Don't think I've seen a car that doesn't.
It has an abridged version of the user manual although I haven't actually checked to see if that engine warning sign is in it. I will have a look next time I go out.

J4CKO

45,737 posts

222 months

Tuesday 20th May 2025
quotequote all
LivLL said:


How in the heck is this a useful symbol for the average driver to warn them of an engine issue?

It’s difficult to describe, hard to search for if you don’t know what it is and doesn’t convey anything to a driver that might be useful.

I know what it means although I really can’t recall when it came into common use. My current car has a digital dash that gives clear pictorial and image warnings for most faults yet it still has a led backlight check engine light.

Has the time come to retire this stupid symbol and just give drivers a more clear warning?

EV drivers - FRO by the way.

Any cars out there that have better symbology?

Rant comes from a family friend phoning this morning to describe a “teapot shaped orange light” on her dash asking what to do. Thank god for smartphones as a photo made it clear to me.
If only cars came with some documentation that details every feature, control, warning signal and operation ?

Folk can pay 50 grand for a car, a thing that weighs a ton and half and more, at speed without being arsed to learn about it how it works by having a scan through the manual ?

Thats on them, manufacturers shouldnt have to dumb it down any further, which is usually pretty idiot proof, if you cant get your head round this then maybe those people shouldnt have the privilege to drive a car ?

I did hear of an oil light being described as the "Gravy boat light", that one was an expensive lesson as the car was not short of gravy, it was short of oil and engines are a bit fussy about that.

Its like that Ruffords Ford, make a detour, dont ruin your car by drivng through metre deep water, this means you are too stupid to be trusted with a motor vehicle, here are some crayons, dont eat them !



Gad-Westy

16,139 posts

235 months

Tuesday 20th May 2025
quotequote all
Monkeylegend said:
Gad-Westy said:
Monkeylegend said:
Dracoro said:
Can anyone answer why car manufacturers (esp with all the screens etc.) don’t have a menu option so owners (and mechanics etc for that matter) to read the code details?
I.e. no real need to plug in an OBD reader.
My BMW has this accessed via the iDrive menu.
To get actual fault codes or just generic messages like 'drivetrain error' etc? I have to plug in my F11 to read actual codes. Don't think I've seen a car that doesn't.
It has an abridged version of the user manual although I haven't actually checked to see if that engine warning sign is in it. I will have a look next time I go out.
I think it will be the same idrive system as mine and just give very generic message and not the actual fault codes that can help diagnose issues.