2000 Check engine light
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Freshman User
Joined: Jun 2004
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2000 Check engine light
I have a 2000 F-150 4.6 4x4 and the check engine light has come on. I had it checked at a local parts store and the code they gave me is P0430. They thought it was the O2 sensor or a wiring issue. If anyone can give me a better idea on this I would really appreciate it. I would like to fix the problem the first time around. If it is the O2 sensor can anyone tell me which one it is or do I just have to go by trial and error? Thanks for the help.
Hotshot
Joined: Aug 2002
Posts: 12,679
Likes: 15
From: BC, Canada
A P0430 means that Bank 2 (driver's side) catalyst system efficiency is below the acceptable threshold.
Possible causes are Use of leaded fuel
Damaged HO2S (the one behind the catalytic convertor)
Malfunctioning ECT
High fuel pressure
Damaged exhaust manifold
Damaged catalytic converter
Oil contamination
Cylinder misfiring
Downstream HO2S wires improperly connected
Damaged exhaust system pipe
Damaged muffler/tailpipe assembly
Retarded spark timing
Possible causes are Use of leaded fuel
Damaged HO2S (the one behind the catalytic convertor)
Malfunctioning ECT
High fuel pressure
Damaged exhaust manifold
Damaged catalytic converter
Oil contamination
Cylinder misfiring
Downstream HO2S wires improperly connected
Damaged exhaust system pipe
Damaged muffler/tailpipe assembly
Retarded spark timing
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Freshman User
Joined: Jun 2004
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Thanks for the information. I have a new O2 sensor so I will try that first. Are the ones that are in the cat the same as the one before the cat? Hope that isn't confusing. I looked at this yesterday and saw that there was one in the top of the cat and it threw me off. Thanks for the help. This is a great site. It has alot of great information.
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Freshman User
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Thanks for the info. I hope to have this replaced by tomorrow. Time to get a tag and I have to face the sniffer.
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Freshman User
Joined: Jun 2004
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Replacing that sensor was a pain in the A_ _!!
I finally got it out though. So far the check engine light has not come back on. I'll give it a few days to see how it goes. Thanks for the help on this.
I finally got it out though. So far the check engine light has not come back on. I'll give it a few days to see how it goes. Thanks for the help on this.
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New User
Joined: Dec 2004
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I have the same problem and am having the rearmost O2 sensor replaced today. If it fixes the problem should I expect the Check Engine light to go out on its own, or do I have to reset it?
My usual technique for reset is removing the battery terminal but I understand that will lose the settings in the management system which then could cause other running problems. Is there a better way to reset the check engine light manually, i.e. removing a certain set of fuses?
Thanks all.
My usual technique for reset is removing the battery terminal but I understand that will lose the settings in the management system which then could cause other running problems. Is there a better way to reset the check engine light manually, i.e. removing a certain set of fuses?
Thanks all.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
Folks, Racerguy tried to explain the meaning of this code, but I think you all missed his point.
This code does NOT indicate a bad O2 sensor. The system monitors the inlet and outlet temperature of the catalytic converter via the O2 sensors. If the difference in these two temperatures is not great enough, that means that the cat is not doing its job. Replacing either one of these sensors is simply shooting the messenger.
What the code IS indicating is a bad catalytic converter. Of all the possible causes that Racerguy gave you, the common denominator is that for some reason the engine was probably running rich. It doesn't have to run rich for very long to cause this.
Good luck,
Doc
ASE Master
This code does NOT indicate a bad O2 sensor. The system monitors the inlet and outlet temperature of the catalytic converter via the O2 sensors. If the difference in these two temperatures is not great enough, that means that the cat is not doing its job. Replacing either one of these sensors is simply shooting the messenger.
What the code IS indicating is a bad catalytic converter. Of all the possible causes that Racerguy gave you, the common denominator is that for some reason the engine was probably running rich. It doesn't have to run rich for very long to cause this.
Good luck,
Doc
ASE Master
New User
Joined: Dec 2004
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You of course might be right, but perhaps you should read his post again.
Here you go:
A P0430 means that Bank 2 (driver's side) catalyst system efficiency is below the acceptable threshold.
Possible causes are Use of leaded fuel
Damaged HO2S (the one behind the catalytic convertor)
..
..
..
I'm going to try this before forking out thousands on a new Cat or Exhaust system.
Here you go:
A P0430 means that Bank 2 (driver's side) catalyst system efficiency is below the acceptable threshold.
Possible causes are Use of leaded fuel
Damaged HO2S (the one behind the catalytic convertor)
..
..
..
I'm going to try this before forking out thousands on a new Cat or Exhaust system.
Cargo Master
Joined: Dec 2004
Posts: 2,232
Likes: 3
From: NE Texas
Yes, the sensor is certainly on the list of possibilities, however, if it were the sensor itself or the associated circuit, you would get a P015X code. The diagnostics in the system aren't dumb, they know the difference.
Good luck,
Doc
ASE Master
Good luck,
Doc
ASE Master