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96 Lincoln Towncar oxygen sensor
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Anonymous Poster
snoe2006@yahoo.com
Dec 24, 2008, 9:35 AM
Post #1 of 9
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96 Lincoln Towncar oxygen sensor
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Hello all, my friend has a 96 Lincoln Towncar and 3 codes came up on my scanner- PO420, PO171 and PO174 The PO420 has to do with Mass airflow sensor, and I believe I can remove it and clean it, but the other 2 I was wondering how many oxyen sensors are there and where are they located? Any help would be appreciated Thanks
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Loren Champlain Sr
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Dec 24, 2008, 1:47 PM
Post #2 of 9
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Re: 96 Lincoln Towncar oxygen sensor
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Yes, cleaning the MAF on Fords will usually bring them back to life. I'm not at work now, so can't advise you on the 171 and 174 codes. Just because you come up with O2 codes doesn't neccessarily mean they are bad. There may be other concerns causing the O2s to set a code. The Lincoln will have two upstream O2s and at least one downstream. Now, if the codes are for heater circuits, 9 times out of 10, the O2 will need to be replaced, but...it could be a circuit problem (no voltage to the heater circuit). Good luck.
Loren
SW Washington
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way2old
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Dec 24, 2008, 3:14 PM
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Re: 96 Lincoln Towncar oxygen sensor
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The P0420 does not have anything to do with the MAF. That code is for the converter operating below efficiency. The P0171 and P014 are for both banks of the engine running lean. Neither of those codes indicate MAF or O2 sensor. The MAF may or may not have anything to do with the 171 and 174. If you cure the reason for running lean and erase the codes, you may not have the 420 any more either. Lean conditions can be vacuum leak, low fuel pressure, plugged fuel filter, air leak after MAF in the air inlet tube. Plus a few more items.
Being way2old is why I need help from younger minds
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Guest
Anonymous Poster
snoe2006@yahoo.com
Dec 26, 2008, 4:26 AM
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Re: 96 Lincoln Towncar oxygen sensor
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Thanks for your quick responses, I guess I will have to investigate further as to what's going on.
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Anonymous Poster
snoe2006@yahoo.com
Dec 29, 2008, 3:53 PM
Post #5 of 9
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Re: 96 Lincoln Towncar oxygen sensor
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I cleaned the mass airflow sensor reinstalled it and am waiting to hear back from my friend on which of any codes show up. Thanks for the information. As for the PO420, I'ii wait to see
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way2old
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Dec 29, 2008, 4:13 PM
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Re: 96 Lincoln Towncar oxygen sensor
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Keep us informed. And thanks for the update.
Being way2old is why I need help from younger minds
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Guest
Anonymous Poster
snoe2006@yahoo.com
Dec 31, 2008, 1:56 PM
Post #7 of 9
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Re: 96 Lincoln Towncar oxygen sensor
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He told me the check engine light came back on, so I scanned it and the only code was PO420. I guess I solved the PO171&PO174 code, because I cleaned the mass airflow sensor. Now I'm unsure of what to do about the PO420.Any suggestions on this? could it be catalytic converter or oxygen sensors? Thanks
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way2old
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Dec 31, 2008, 4:29 PM
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Re: 96 Lincoln Towncar oxygen sensor
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95% of the time the converter is the cause of the P0420 code. Something caused the converter to fail. As our resident emission specialist says "Converters do not die, they are murdered."
Being way2old is why I need help from younger minds
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Guest
Anonymous Poster
snoe2006@yahoo.com
Jan 1, 2009, 4:14 PM
Post #9 of 9
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Re: 96 Lincoln Towncar oxygen sensor
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Thanks so much for the info, I will keep you informed on the progress!
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