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6.7L Power Stroke Engine and Drivetrain Discussion of the 6.7L Power Stroke diesel engine and drivetrain in the 2011-Up Super Duty trucks. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.7L Power Stroke engine.

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Old 12-01-2012, 01:09 PM   #1 (permalink)
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P20E8 code

My 2011 F350 just started throwing a P20E8 code. "Reductant Pressure too Low". Can any body tell me what that means. Thanks for the help.
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Old 12-01-2012, 02:30 PM   #2 (permalink)
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Reductant = DEF
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Old 12-01-2012, 04:43 PM   #3 (permalink)
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It means you most likely need a new pump assembly. Either the sensor or the pump itself is bad, and they are an assembly.
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Old 12-05-2012, 03:25 PM   #4 (permalink)
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Reductant Pressure Too Low

Description: The powertrain control module (PCM) monitors reductant pressure as the system primes for injection. If the system pressure does not exceed 350 kPa (51 psi) within 45 seconds after the reductant pump starts, this DTC sets.

Possible Causes:
Damaged reductant pump
Damaged reductant purge valve
Damaged reductant pressure line
Damaged reductant injector
Damaged reductant pressure sensor

Diagnostic Aids The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power.
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Old 12-05-2012, 03:32 PM   #5 (permalink)
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I just got my truck back . I dropped it off Monday night and picked it up the following Monday. I
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Old 12-05-2012, 03:51 PM   #6 (permalink)
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Sorry about the incompleat post, my ham fingers hit the wrong button. My truck threw that code and they replaced the reductant tank assy and the reductant heater and sender assy. The code came up a few days after I had the NOX update done. I don't think it can be related but who knows. 20,400 miles still under warrenty
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2000,F250SD,SC,PSD,4X4,SB,6SPD.TRADED 2002 F250SD,CC,PSD,4X4,6SPD.TRADED Both bone stock,NO cackle!Rotella T,Stanadyne performance additive every tank.2 out of 2 an't bad. 2004 F350 CC 6.0 Torque shift,4X4,TRADED. 2008 F350 CC4X4 GAS!!!TRADED. 2011 F350 CC Lariat FX4 Back to DIESEL TRADED. 2013 F350 CC Lariat ultimate 4x4 Ruby Red.
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Old 12-07-2012, 10:37 AM   #7 (permalink)
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Quote:
Originally Posted by Desert John View Post
My 2011 F350 just started throwing a P20E8 code. "Reductant Pressure too Low". Can any body tell me what that means. Thanks for the help.
Quote:
Originally Posted by tomallen View Post
Sorry about the incompleat post, my ham fingers hit the wrong button. My truck threw that code and they replaced the reductant tank assy and the reductant heater and sender assy. The code came up a few days after I had the NOX update done. I don't think it can be related but who knows. 20,400 miles still under warrenty
Hi Desert John and tomallen,

I want to step in here and get both of you escalated to your regional customer service managers. They can assist by working directly with your dealership on a resolution for your concerns. To get started, send me a PM with your VIN, dealer, mileage, daytime phone number, and full name.

Quote:
Originally Posted by KJ Smith View Post
Reductant = DEF
Quote:
Originally Posted by YT90SC View Post
It means you most likely need a new pump assembly. Either the sensor or the pump itself is bad, and they are an assembly.
Quote:
Originally Posted by RyanP2317 View Post
Reductant Pressure Too Low

Description: The powertrain control module (PCM) monitors reductant pressure as the system primes for injection. If the system pressure does not exceed 350 kPa (51 psi) within 45 seconds after the reductant pump starts, this DTC sets.

Possible Causes:
Damaged reductant pump
Damaged reductant purge valve
Damaged reductant pressure line
Damaged reductant injector
Damaged reductant pressure sensor

Diagnostic Aids The presence of this DTC may indicate that the vehicle is operating in derate mode and may experience a loss of power.
Thanks for all the great info, gang! I'm sure Desert John appreciates it!

Crystal
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Old 10-08-2014, 08:24 AM   #8 (permalink)
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My 2011 F350 just threw this code yesterday. Went out of 3 year warranty 3 Sept 2014. Oh joy.
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Old 10-08-2014, 11:48 AM   #9 (permalink)
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My 2011 F350 just threw this code yesterday. Went out of 3 year warranty 3 Sept 2014. Oh joy.
Welcome to the forum, HillbillyGirl. What's the current mileage on your truck? Do you plan on having your dealership check it out?

Crystal
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Old 10-09-2014, 06:37 AM   #10 (permalink)
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Hi Crystal.
She has 31236 on her currently. Went out of warranty the first week of Sept. I have a appointment for this coming Tuesday.
Hopefully it isn't too painful.

Hillbilly
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Old 10-09-2014, 10:12 AM   #11 (permalink)
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Hi Crystal.
She has 31236 on her currently. Went out of warranty the first week of Sept. I have a appointment for this coming Tuesday.
Hopefully it isn't too painful.

Hillbilly
Come back and tell us how things go on Tuesday, Hillbilly. I'll be able to check out ways to help once this has been diagnosed by your dealer.

Crystal
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