CODE45
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Joined: Jun 2001
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From: KANAGAWA, JAPAN
CODE45
Hello!
My 1990 GTA had trouble code 45 about 2 hours ago.
He made a noise like Harley Davidson's motorcycles and vibrated like a V7 engine.
Do you think what's the cause?
Help me ,please!
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1990 FIreBird Trans-Am GTA
My 1990 GTA had trouble code 45 about 2 hours ago.
He made a noise like Harley Davidson's motorcycles and vibrated like a V7 engine.
Do you think what's the cause?
Help me ,please!
------------------
1990 FIreBird Trans-Am GTA
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Joined: Jan 2000
Posts: 19,679
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Billy,
Welcome aboard!
The '45' is caused by a rich fuel mixture indication at the oxygen sensor. Since you had rough operation and likely had some exhaust smoking, you probably had a truly rich condition.
It is not often that an oxygen sensor fails in that mode. Generally it will give a lean mixture reading as it begins to fail. I would suspect that the sensor is operating correctly and sensed a rich condition. The difficulty will be in determining the cause of the rich condition.
It's possible that the fuel pressure regulator is sticking or damaged. You may also have a sticking injector. Since your '90 should not have a cold start injector, that is not a possibility. I'm not certain if the exports changed at the same time as the domestic systems, so I only mentioned that in case there is a difference.
You could also have a highly restriced air filter element from debris or a large amount of dust. I would suspect that this would have also set a MAP error code (33 or 34) but it may not have.
Welcome aboard!
The '45' is caused by a rich fuel mixture indication at the oxygen sensor. Since you had rough operation and likely had some exhaust smoking, you probably had a truly rich condition.
It is not often that an oxygen sensor fails in that mode. Generally it will give a lean mixture reading as it begins to fail. I would suspect that the sensor is operating correctly and sensed a rich condition. The difficulty will be in determining the cause of the rich condition.
It's possible that the fuel pressure regulator is sticking or damaged. You may also have a sticking injector. Since your '90 should not have a cold start injector, that is not a possibility. I'm not certain if the exports changed at the same time as the domestic systems, so I only mentioned that in case there is a difference.
You could also have a highly restriced air filter element from debris or a large amount of dust. I would suspect that this would have also set a MAP error code (33 or 34) but it may not have.
Thread Starter
Junior Member
Joined: Jun 2001
Posts: 7
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From: KANAGAWA, JAPAN
Thank you for your help, Mr.Vader.
I changed air filter a week ago.
So it's not the cause, I think.
The cars for export to JAPN have same system as US domestic model in operating systems.
The differences between domestic and export model are only exteriors, probably.
Sorry for my improper ENGLISH.
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1990 FIreBird Trans-Am GTA
I changed air filter a week ago.
So it's not the cause, I think.
The cars for export to JAPN have same system as US domestic model in operating systems.
The differences between domestic and export model are only exteriors, probably.
Sorry for my improper ENGLISH.
------------------
1990 FIreBird Trans-Am GTA
Member
Joined: Jan 2008
Posts: 221
Likes: 0
From: Kansas City, KS
Car: 92 WS6 Trans am convertible
Engine: ls 6.2
Transmission: 4l80
Axle/Gears: 2.73's
Re: CODE45
[quote=billy the kid;166092]Thank you for your help, Mr.Vader.
I changed air filter a week ago.
So it's not the cause, I think.
The cars for export to JAPN have same system as US domestic model in operating systems.
The differences between domestic and export model are only exteriors, probably.
Sorry for my improper ENGLISH.
same code 45 what to do?
did you ever find out what the problem was?
any good ideas where to start at?
I changed air filter a week ago.
So it's not the cause, I think.
The cars for export to JAPN have same system as US domestic model in operating systems.
The differences between domestic and export model are only exteriors, probably.
Sorry for my improper ENGLISH.
same code 45 what to do?
did you ever find out what the problem was?
any good ideas where to start at?
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