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I have a 2005 Ford Freestar van 3.9 L engine. The computer
I have a 2005 Ford Freestar van 3.9 L engine. The computer through a PO420 code I Cleared it and it hasn't come back yet.… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
2005 Ford F350 XL V.I.N. 5EC58354NO START...SPINS OVER...NO
2005 Ford F350 XL V.I.N. 5EC58354 NO START...SPINS OVER...NO START 8 Active Codes 1/8 P0171 BANK 1 SYSTEM TOO LEAN 2/8 P0340 CAMSHAFT POSITION SENSOR A CIRCUIT BANK 1 OR SIGNAL SENSOR 3/8 P0420 CATALY… read more
James
James
Bachelors degree automotive technology with minor in diesel
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ford escape: i have a 2005 ford escape with check engine light
i have a 2005 ford escape with check engine light on my code reader indicates its code p0420 catalyst efficiency below threshold i am looking for the cause of that so i can make repairs… read more
Ron
Ron
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Vocational, Technical or Trade Scho
25,182 satisfied customers
Check engine code..Catalyst..efficiency below threshold..Cost estimate
Check engine code gave me this message: Catalyst efficiency below threshold bank I. What does it mean? How fix? Cost estimate? Any other information?… read more
davehop
davehop
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Ford Master Technician. Hyundai Master Technician
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2004 Taurus: I have a po430 bank 2 cat efficiency code;below threshold
I have a po430 bank 2 cat efficiency code;below threshold on my 2004 Taurus.What would be wrong with it?… read more
Shawn
Shawn
Self Employed
Vocational, Technical or Trade Scho
360 satisfied customers
2006 F-150: 4x4..my check engine light was on and it read..Catalyst
I have a Ford 2006 F-150 4x4 with a 5.4 Triton engine. I took it to get it a diagnostic test because my check engine light was on and it read out, Catalyst efficiency below Threshold (Bank 2). I have … read more
Tim Mohr
Tim Mohr
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ford: im looking for information on some trouble codes..van..p0420
im looking for information on some trouble codes i found on an 08 ford e searies van, they are P0420 and P0705… read more
CTFordTech
CTFordTech
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2004 Ford Taurus: 6 cylinder..accelerate..When hooked up to the meter
I have a 2004 Ford Taurus, 6 cylinder, 12 valve. It won't accelerate over 20 mph. When hooked up to the meter it was giving this code: p0420 Catalyst System Efficiency Below Threshold (Bank 1). Do you… read more
JHoop
JHoop
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High School or GED
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99 contour: had code p0420 replaced bank 1 o2 sensors test drove
99 contour had code p0420 replaced bank 1 o2 sensors test drove and returned with pending code p1151 what do you think… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
1997 Aspire: runs fine..cool..check engine light comes on... any ideas
I have a 1997 Aspire, it runs fine at cool temps but once it heats up it begins to miss. These are the codes I get when the check engine light comes on... any ideas? Thanks! p0300 - random misfire p03… read more
Anthony
Anthony
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Vocational, Technical or Trade Scho
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2003 Ford Taurus: Autozone..Catalyst efficiency below threshold
My 2003 Ford Taurus engine light is on. I took it to Autozone and they said the code was "Catalyst efficiency below threshold". What is wrong with my car?… read more
Kevin
Kevin
High School or GED
42 satisfied customers
1997 ford: pickup..liter engine..Im getting a Diagnostic code..p0430
I Have a 1997 ford pickup. 4.2 liter engine. Im getting a Diagnostic code p0430.( catalst system efficiency below threshold bank 2). Do this error code refer to my oxygen sensors or catalyst converter… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
2004 Ford Ranger: code reader..Code p0420..Catalyst..Service Manual
We have a 2004 Ford Ranger. Our OBD II code reader is coming up with Code P0420, Generic description - Catalyst System Efficiency Below Threshold (Bank 1). The book then says to refer to the Vehicle''… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
1996 F-150: 2WD..5speed..my states emission test. 2 codes..P0420
1996 F-150 2WD 5.0 5speed rececently failed my states emission test. 2 codes were Ford codes ad the third was P0420 a Catalyst System Efficiency below Threshold Limit (bank 1). The ford codes were P13… read more
RIP
RIP
Lead Technician
Vocational, Technical or Trade School
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96 ford taurus: put an obd II code reader..po420..egr valve and i
I have a 96 ford taurus that does not start it will start some times. I have put an obd II code reader to it and have recieved the codes po401, po420, po430 i was told with these codes to replace the … read more
Matt Kesler
Matt Kesler
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Doctoral Degree
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98 Ford Explorer: 12/97..Check Eng Light..analyzer..slow..converters
98 Ford Explorer 5.0 purchased 12/97, 71K has Check Eng Light on. Ford advises error code PO430 in memory twice, analyzer reports #11 & #21 HEGOS slow, both left and right converters failed. Warrenty … read more
Chris (aka- Moose)
Chris (aka- Moose)
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Vocational, Technical or Trade School
29,223 satisfied customers
P0430 code keeps reoccuring . . . Bank 2 [is that the right ...
P0430 code keeps reoccuring . . . Bank 2 [is that the right passenger side] . . . "cat efficiency below limit" . . . is this an o2 on the passenger side problem [have already replaced the sensor 'behi… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
1996 Ford WIndstar: the possible problems are..P0420..Catalyst System
I need to know what the possible problems are with my 1996 Ford WIndstar GL. I brought it in and had the system read. It came up with this: P0420 Catalyst System Efficiency Below Threshold (Bank 1).… read more
Ford Expert
Ford Expert
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Meet the Experts:

Ron

Ron

ASE Certified Technician

25,182 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

29,223 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

1,591 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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