Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: PxMetro on 02 August 2008, 08:25:09
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Driving home yesterday in my 2.6 estate when the "Engine" Warning light came on and stayed on (The one that looks like the profile of an Engine)
My Handbook says this is a fault with the Engine electronics or emissions control.
Has anyone experienced this? I know not where to start looking for the problem. The engine still seems to run ok, and nothing appears to be hanging off.
I was planning on driving down to Heathrow Airport tomorrow, so now wondering if I should be looking for alternative transport. :o :o ::) ::)
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Driving home yesterday in my 2.6 estate when the "Engine" Warning light came on and stayed on (The one that looks like the profile of an Engine)
My Handbook says this is a fault with the Engine electronics or emissions control.
Has anyone experienced this? I know not where to start looking for the problem. The engine still seems to run ok, and nothing appears to be hanging off.
I was planning on driving down to Heathrow Airport tomorrow, so now wondering if I should be looking for alternative transport. :o :o ::) ::)
If light remains on you are mean't to seek urgent dealer advice and in the meantime not drive the car except (slowly) to a garage. :(
Could be just a fault of the system, but on the other hand could be more serious. :(
If competant at DIY mechanics then do a "paper clip test"
(See Forum Guide at http://www.omegaowners.com/forum/YaBB.pl?num=1189022687 ) if no Tech 2 available to ascertain fault code(s). Failing that you should seek advice. Other expert Omega members will no doubt advise further later :y.
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Paperclip test won't work on a 2.6, but there is a way to flash the codes up which I cant remember the sequence at the moment.
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Paperclip test won't work on a 2.6, but there is a way to flash the codes up which I cant remember the sequence at the moment.
Thanks Pete, I missed the point that it was a 2.6! ::) ::)
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
OK Guys, thanks for the response so far.
I have tried the above test; the results as follows:
10 Flashes
Pause
1 Flash
Pause
7 Flashes
Pause
3 Flashes
Does this make sense?
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
OK Guys, thanks for the response so far.
I have tried the above test; the results as follows:
10 Flashes
Pause
1 Flash
Pause
7 Flashes
Pause
3 Flashes
Does this make sense?
0173 = HEGO according to Entwoods code list.
Wtf is that? Anyone?
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
OK Guys, thanks for the response so far.
I have tried the above test; the results as follows:
10 Flashes
Pause
1 Flash
Pause
7 Flashes
Pause
3 Flashes
Does this make sense?
0173 = HEGO according to Entwoods code list.
Wtf is that? Anyone?
It is the HEATED EXHAUST GAS OXYGEN (HEGO) SENSOR ;)
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
OK Guys, thanks for the response so far.
I have tried the above test; the results as follows:
10 Flashes
Pause
1 Flash
Pause
7 Flashes
Pause
3 Flashes
Does this make sense?
It is the HEATED EXHAUST GAS OXYGEN (HEGO) SENSOR :y
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paper clip no good on that engine. Pedal trick, foot on
Brake gas to the floor, turn on ignition fully do NOT
fire the engine. When dash lights go out, car/spanner
Symbol should flash, 4 sets of flashes for 4 digit
Code. Pause and so on, 10 flashes is zero. Constant
Flashing no codes. Post results.
Hope helps.
Ps common prob is faulty pre cat giving emission code.
But dont worry if its that. No biggy.
OK Guys, thanks for the response so far.
I have tried the above test; the results as follows:
10 Flashes
Pause
1 Flash
Pause
7 Flashes
Pause
3 Flashes
Does this make sense?
0173 = HEGO according to Entwoods code list.
Wtf is that? Anyone?
It is the HEATED EXHAUST GAS OXYGEN (HEGO) SENSOR ;)
AHA, is that the sensor between the pre cat and big
Proper cat converter? If so it is the pre cat issue. Is
That correct?
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I have the same problem, has been reset several times over the past year, seems fine on motorway runs, then as soon as you hit town, it comes back on. If it is the pre-cats then don't change the lamda's like I done as it's a waste of money, you could try some cataclean, but I beleive Bob.dent tried some and never made any change.
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I have the same problem, has been reset several times over the past year, seems fine on motorway runs, then as soon as you hit town, it comes back on. If it is the pre-cats then don't change the lamda's like I done as it's a waste of money, you could try some cataclean, but I beleive Bob.dent tried some and never made any change.
Ok, so to be clear for Mr Metro the issue is caused by
The pre cat collapsing or damage of some sort, possibly
Engine oil or some contamination from the engine,
Possibly from removing oil from a plug well or over
Filling the sump? Cats dont like oil and the breather
System is ment to burn excess oil through the engine
But excess can get through and bugger the cat. Or they
Just collapse with age, as i understand it.
What ever the cause they are not workin to a level
The sensor expects and causes a code. It is not a major
Problem as it is not said to cause an emissions issue
At mot, as the bigger cats still do the job.
The problem is with the light coming on and possiblly
Hiding other issues. How do you reset the light?
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I have the same problem, has been reset several times over the past year, seems fine on motorway runs, then as soon as you hit town, it comes back on. If it is the pre-cats then don't change the lamda's like I done as it's a waste of money, you could try some cataclean, but I beleive Bob.dent tried some and never made any change.
Ok, so to be clear for Mr Metro the issue is caused by
The pre cat collapsing or damage of some sort, possibly
Engine oil or some contamination from the engine,
Possibly from removing oil from a plug well or over
Filling the sump? Cats dont like oil and the breather
System is ment to burn excess oil through the engine
But excess can get through and bugger the cat. Or they
Just collapse with age, as i understand it.
What ever the cause they are not workin to a level
The sensor expects and causes a code. It is not a major
Problem as it is not said to cause an emissions issue
At mot, as the bigger cats still do the job.
The problem is with the light coming on and possiblly
Hiding other issues. How do you reset the light?
Interestingly, I topped up the engine oil yesterday in response to a display message saying "Engine oil low" (or something like that) And reading an artical posted by MDTM, suggesting that the oil level on the dipstick should be closer to 3/4 rather than 1/2, I duly added a small quantity.
This might be totally unrelated, but I did top up before the warning light appeared! :-?
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lets see what the others say about it. Its just my
thinking on it at the moment. My mrs polo has a bright
Yellow sticker on the engine bay saying do not over fill with
Oil as damage to the cat may result.
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lets see what the others say about it. Its just my
thinking on it at the moment. My mrs polo has a bright
Yellow sticker on the engine bay saying do not over fill with
Oil as damage to the cat may result.
Ideally all cars should be kept filled up to "Max", but never beyond that as oil can seep through the oil seals and in manual cars contaniminate the clutch plate amoung other things, as well as increasing the oil pressure beyond design criteria; i.e. things will start to leak and possibly blow including excessive oil being forced, unburnt, through the combustion chambers and into the exhaust /cat(s)! That has been the understanding and teachings for all the cars I have ever worked on! ;)
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Looks like early signs of precat failure, I would have expected P0420 / P0430 codes though so may be worth getting the lambda's checked / cleaned just in case.
Afraid it's nothing to do with oil etc, just that the precats aren't up to the job after a few years, don't worry though as the car will fly through an MOT as the main cats are well up to the job.
NB. that on 2.2 / 2.6 / 3.2 cars, the lamp with the picture of the engine is not engine management, it's emissions. If it's lit and stays lit the (the usual issue) then the ecu has just counted up to it's threshold level. Only worry if the lamp flashes.
The engine management lamp is the one with a picture of a car with the spanner through it.
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Looks like early signs of precat failure, I would have expected P0420 / P0430 codes though so may be worth getting the lambda's checked / cleaned just in case.
Afraid it's nothing to do with oil etc, just that the precats aren't up to the job after a few years, don't worry though as the car will fly through an MOT as the main cats are well up to the job.
NB. that on 2.2 / 2.6 / 3.2 cars, the lamp with the picture of the engine is not engine management, it's emissions. If it's lit and stays lit the (the usual issue) then the ecu has just counted up to it's threshold level. Only worry if the lamp flashes.
The engine management lamp is the one with a picture of a car with the spanner through it.
I had a good look under the car today, and there apear to be FOUR Lambda sensors. Two before the pre-cats, and two after. The two before the pre-cats look virtually impossible to get to, so in peoples opinion, and based on experience, which are most likely to be the culprits?
Thanks for all the feed back to this point by the way!
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Get the codes cleared and see if any come back :y
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The Lambda's pre the precat are for mixture control.
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:y Cheers :y