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Related Ford Questions
F-350 says needs blue def. Will not accept it from the pump
F-350 says needs blue def. Will not accept it from the pump or a jug … read more
HDGENE
HDGENE
8,312 satisfied customers
My check engine light came on in my 2015 f250. The code that
My check engine light came on in my 2015 f250. The code that comes up is P21BO. I have not experienced any power problems yet. Should I just delete the code to see if it occurs again or is it somethin… read more
Eric
Eric
Retired
N/A
39,924 satisfied customers
2012 F350, low def warning on panel, refilled tank and
2012 F350, low def warning on panel, refilled tank and warning won't clear. Disconnected batteries and CEL and low def still on … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
32,873 satisfied customers
I am looking at a 2012 F-250 6.7 Diesel truck for sale. It
I am looking at a 2012 F-250 6.7 Diesel truck for sale. It has codes P203D, P0473, P0402, P0471, P0198, P24A5, P1249, P20E8, P21B0. Does this seem like it has multiple issues or is this all seem to re… read more
Kurt Mulling
Kurt Mulling
Lead Technician/ now retired
High School or GED
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The dreaded exhaust fluid system fault 50 MPH. About 74k
about 74k milage really good just last weekend on a long trip 18-19 mpg … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
32,873 satisfied customers
I have a 2011 Ford F-350 6.7 powerstroke, boost gauge is
Hello i have a 2011 Ford F-350 6.7 powerstroke, boost gauge is maxed out at idle and keep getting the code P06A7, what are steps to test my vref connections? … read more
Andrew
Andrew
Master Diagnostic Technician
Associate of Occupational in Automotive Technology
470 satisfied customers
The DEF fill seems clogged. F350 2012 with powerstroke. I
I disconnected the breather line and tried to blow in it, but there is no flow. The fill line also seems to be blocked The truck is now derated due to low DEF level … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
32,873 satisfied customers
I have a 2012 f350 6.7 I had a code p21bo is this part of
I have a 2012 f350 6.7 I had a code p21bo is this part of the defense system … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
32,873 satisfied customers
2012 f350 6.7 cab chassis with 130k. I lose turbo boost
2012 f350 6.7 cab chassis with 130k. I lose turbo boost pressure often. Usually maxes out around 30psi but while driving it tends to suddenly max out at 20psi, a huge loss in power. No CEL but if I us… read more
Daniel Wilson
Daniel Wilson
Auto Mechanics 1&2/diesel mech
1,034 satisfied customers
I have a 2014 Ford F250 Super Duty 6.7 Diesel 4WD Crew Cab
I have a 2014 Ford F250 Super Duty 6.7 Diesel 4WD Crew Cab with an 8 ft bed with the tow package and 53,000 miles. I bought this truck last fall it has a 1 year 12,000 mile warranty from the dealer + … read more
JOHN aka Eauto
JOHN aka Eauto
self employed
High School or GED
20,924 satisfied customers
Reductant level sensor fault, reset several times with
Reductant level sensor fault, reset several times with refill of DEF, now will not reset, also now reading DEF pressure low. What would i replace … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
42,757 satisfied customers
I got a message on the dash this morning saying that the DEF
I got a message on the dash this morning saying that the DEF had 800 miles to empty and started to count down. Parked truck for 3-4 hours and then went to lunch. While driving to lunch the CEL came on… read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,725 satisfied customers
Getting a P21BO code on my F250 2012 truck. That is the
Yes, that is the exact code and I clear it only to have come right back. … read more
Scott
Scott
Diesel, Automatic trans, full line tech
Associate Degree
3,881 satisfied customers
I accidentally added 6 Oz of antigel to the Def fank, 2014
I accidentally added 6 Oz of antigel to the Def fank … read more
Chris
Chris
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Engine code P21b0, it just came up this morning P21B0. I
it just came up this morning P21B0. I have not tried to reset yet. wanted to know what it was first … read more
Dan
Dan
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Vocational, Technical or Trade Scho
24,751 satisfied customers
My 2011 f350, 6.7 diesel has the CEL on. Dealer says code is
My 2011 f350, 6.7 diesel has the CEL on. Dealer says code is p21bo reductank level sensor C circuit high with the circuit ok. Stating the sensor is devective or contaminated. I have read in other foru… read more
HDGENE
HDGENE
8,312 satisfied customers
Have a obd code p21b0 on f350 6.7 diesel. Is this the def
Have a obd code p21b0 on f350 6.7 diesel. Is this the def tank sender or resivoir issue? … read more
Jeremy
Jeremy
Senior Technician
Associate Degree
1,511 satisfied customers
F350 PSD: 04 F350 PSD/automatic 4x4 shortbed. Has 120k on it,
04 F350 PSD/automatic 4x4 shortbed. Has 120k on it, reman FICM, one new injector due to injector wiring screw failure, EGR delete, new oil cooler. Current ambient temp is under 40*f. 4days ago it star… read more
Expert
Expert
6,952 satisfied customers
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Meet the Experts:

Ron

Ron

ASE Certified Technician

42,757 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

32,873 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

12 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

2,274 satisfied customers

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

Richard

Richard

ASE Certified Technician

1,550 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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