Check Engine MY01 after changing exhaust system
19 June 2001, 12:50 AM
#1
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If the second Lambda sensor does not get the required information, it will throw up a check engine light warning.
If it see's this happening more than a few times, it drops into limp mode which will then require an ECU reset. (Far more complex than an earlier model ECU reset as it's a completley different ECU).
Mike.
If it see's this happening more than a few times, it drops into limp mode which will then require an ECU reset. (Far more complex than an earlier model ECU reset as it's a completley different ECU).
Mike.
19 June 2001, 08:20 AM
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Hi
I have changed the complete exhaust system on my MY01 fom the turboback to tail.
Now, after 300 km,the Check Engine flashed up and reports a "unsufficient cat function".
The original place of the sensor is in the middle of the cat, now it's placed after a 3" High Flow Cat.
Does anyone has an idea how to cure this problem?
I know that Pete Croney is working on a fix but that man seems to be very busy.
Has anyone tried this fix?
Any other ideas?
Frank :-)
PS: I am using only SUL+>98ROZ and have the newest version of the ECU-programm?
I have changed the complete exhaust system on my MY01 fom the turboback to tail.
Now, after 300 km,the Check Engine flashed up and reports a "unsufficient cat function".
The original place of the sensor is in the middle of the cat, now it's placed after a 3" High Flow Cat.
Does anyone has an idea how to cure this problem?
I know that Pete Croney is working on a fix but that man seems to be very busy.
Has anyone tried this fix?
Any other ideas?
Frank :-)
PS: I am using only SUL+>98ROZ and have the newest version of the ECU-programm?
19 June 2001, 01:26 PM
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The car <B>does not</B> go into limp home mode. In fact this error code makes no difference at all to the running of the car.
The OBD (On Board Diagnostic) system has to detect that the gas is outside its limits twice, before the error gets registered and the light comes up to advise the driver.
The error code is P0420 "Catalyst below optimum efficiency threshold".
An ECU reset is no more complicated than before however, for certain non performance affecting codes, you now have two options.
You can do a total reset, as before, or you can reset through OBD and preserve all learnt operating parameters. If you do a total reset, the cars runs like a dog for approx 25 miles, whilst it re learns everything. When reset in OBD, you don't even have to turn the engine off.
When my car was on PE's rolling road, (244bhp - 2900 miles) the light was on.
Unlike previous ECU's this one cannot be flash tested and will not reset by removing the battery. It can only be reset with a Select Monitor.
The OBD (On Board Diagnostic) system has to detect that the gas is outside its limits twice, before the error gets registered and the light comes up to advise the driver.
The error code is P0420 "Catalyst below optimum efficiency threshold".
An ECU reset is no more complicated than before however, for certain non performance affecting codes, you now have two options.
You can do a total reset, as before, or you can reset through OBD and preserve all learnt operating parameters. If you do a total reset, the cars runs like a dog for approx 25 miles, whilst it re learns everything. When reset in OBD, you don't even have to turn the engine off.
When my car was on PE's rolling road, (244bhp - 2900 miles) the light was on.
Unlike previous ECU's this one cannot be flash tested and will not reset by removing the battery. It can only be reset with a Select Monitor.
19 June 2001, 02:01 PM
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Hi
until now I could not sense any lost in power or any other strange engine behaviour.
The only problem that I see at the moment is the fact that if any other severe failure will happen, my CheckEngine light is already flashed.
How can it be - as PE and BPM recommend - that by replacing the downpipe and installing a High Flow cat only, the ECU sees the correct values?
Means this that one HF-cat is better than the two standard cats?
Thanks
Frank :-)
until now I could not sense any lost in power or any other strange engine behaviour.
The only problem that I see at the moment is the fact that if any other severe failure will happen, my CheckEngine light is already flashed.
How can it be - as PE and BPM recommend - that by replacing the downpipe and installing a High Flow cat only, the ECU sees the correct values?
Means this that one HF-cat is better than the two standard cats?
Thanks
Frank :-)
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