P20E8

Reductant Pressure Too Low

DTC P20E8, sometimes indicated as P20E800 is an OBD diagnostic trouble code indicating a manufacturer-specific fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the air/fuel mixture causing reductant pressure too low.

  • P20E8: Reductant Pressure Too Low
  • P20E8: Reductant pressure – pressure too low
  • P20E8 00: Reductant pressure - pressure too low

DTC Trouble Code Search
Bulletins

Bulletins are notices put out by manufacturers in conjunction with the NHTSA to notify the public of manufacturing issues or changes.

  • S1925000008 - SERVICE BRAKES, HYDRAULIC
    JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P208B ? Reductant pump 1 control performance, and/or P20E8 ? Reductant pressure too low, set.
  • S1925000008 - FUEL SYSTEM, GASOLINE
    JEEP: (rev. B) malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • S1925000008RevA - SERVICE BRAKES, HYDRAULIC
    JEEP: (revision a) malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • S1925000008 - SERVICE BRAKES, HYDRAULIC
    JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P208B ? Reductant pump 1 control performance, and/or P20E8 ? Reductant pressure too low, set.
  • S1925000008 - ELECTRICAL SYSTEM
    JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P208B ? Reductant pump 1 control performance, and/or P20E8 ? Reductant pressure too low, set.
  • KC-771 - FUEL SYSTEM, DIESEL
    MACK: (back office only) mack chassis - diagnosing the aftertreatment control module dtcs P202D, P208E, P20E8 - obd13 (commonly model year 2014); newer chassis after reviewing other solutions
  • KC-4 - ENGINE AND ENGINE COOLING
    MACK: Diagnostic trouble code ( dtc ) P20BA, ( related dtc P20E8 ) : fault code reductant ( diesel exhaust fluid - def ) heater control performance diagnosis
  • KC-4 - ENGINE AND ENGINE COOLING
    VOLVO: Diagnostic trouble code ( dtc ) P20BA, ( related dtc P20E8 ) : fault code reductant ( diesel exhaust fluid - def ) heater control performance diagnosis
  • S1925000008 Rev. - BRAKES (PWS)
    JEEP: (rev. B) malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • S1925000008 Rev. - ENGINE (PWS)
    JEEP: (rev. B) malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • S1925000008 Rev. - FUEL SYSTEM, DIESEL:DELIVERY:FUEL PUMP
    JEEP: (revision a) malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • S1925000008 - EQUIPMENT
    JEEP: Malfunction indicator lamp (mil) illumination. Diagnostic trouble codes (dtcs) P20E8 ? Reductant pressure too low and/or P208B ? Reductant pump 1 control performance set.
  • A0119202044927_2 - ENGINE AND ENGINE COOLING
    AUDI: This technical service bulletin provides troubleshootiong and repair instructions for leaking adblue with dtcs P20E800, P249C00, and/or P218F00.
  • K16925952 - ELECTRICAL SYSTEM
    VOLVO: ** tech tip ** tt - 007 - 2015 - diagnosing the aftertreatment control module dtcs P202D, P208E, P20E8 - obd13 (commonly model year 2014); newer chassis after reviewing other solutions
  • K16925952 - EQUIPMENT:ELECTRICAL
    MACK: ** tech tip ** tt - 007 - 2015 - diagnosing the aftertreatment control module dtcs P202D, P208E, P20E8 - obd13 (commonly model year 2014); newer chassis after reviewing other solutions
  • K16925952 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
    MACK: ** tech tip ** tt - 007 - 2015 - diagnosing the aftertreatment control module dtcs P202D, P208E, P20E8 - obd13 (commonly model year 2014); newer chassis after reviewing other solutions
  • K16925952 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
    VOLVO: ** tech tip ** tt - 007 - 2015 - diagnosing the aftertreatment control module dtcs P202D, P208E, P20E8 - obd13 (commonly model year 2014); newer chassis after reviewing other solutions
  • A011689 2040962- - ELECTRICAL SYSTEM
    AUDI: This bulletin provides information for a hardware and software update for tdi clean diesel vehicles with dtc P20E800.
  • A0115322040962-2 - ELECTRICAL SYSTEM:SOFTWARE
    AUDI: Supersedes technical service bulletin group 01 number 15-25 dated june 19, 2015. The mil is on. Dtc P20E800 (reductant pressure too low) is stored in the engine control module. No relevant component or electrical problems are found when gui
  • TT261702_2046803 - ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL:CATALYTIC CONVERTOR
    VOLKSWAGEN: Assistance diagnosing selective catalitic reduction (scr) adblue pressure faults P20E8, P208B, P218F and P249C
  • A011525 2040962- - ELECTRICAL SYSTEM
    AUDI: The mil is on. Dtc P20E800 is stored in the ecm. No relevant component or electrical problems are found when guided fault finding (gff) is run on the stored fault codes. Software update is needed.
  • 167-B1528-12 - EQUIPMENT:ELECTRICAL
    HINO: Sb-15-031 foreign debris in the def (diesel exhaust fluid) tank may cause the scr (selective catalyst reduction) system to malfunction. This can result in dtc?S (diagnostic trouble codes) P20E8 or P20E9 - def pressure abnormality. An inlet
  • TSB 17-0020 - POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM, PCM)
    FORD: Some 2017 f-super duty, 2016-2017 f650/750 vehicles built on or before 20-dec-2016 and equipped with a 6.7l engine may exhibit an illuminated mil with diagnostic trouble code (dtc) P20E8 in the powertrain control module (pcm) memory. This m
  • ASI-44312 - FUEL SYSTEM, DIESEL
    FORD: Ford: the malfunction indicator light (mil) on and diagnostic trouble codes (dtc) P20E8, P202D, P204B are caused by the diesel exhaust fluid (def) maybe contaminated from petroleum based product such as diesel fuel. Model 2011-2014 f-supe
  • ASI-44125 - ENGINE AND ENGINE COOLING:ENGINE:DIESEL
    FORD: Ford: contamination of diesel exhaust fluid (def) from petroleum based product (such as diesel fuel), trucks may exhibit malfunction indicator light (mil) with dtc P20E8, P202D and/or P207F, causing rubber seals and o rings to swell and/or
Consumer Complaints for this DTC



2018 JEEP GRAND CHEROKEE with 1692.0 miles

After having my Jeep brand new from the dealer roughly about two weeks after purchasing the check engine light turned on. We bought our Jeep from autonation in spring, tx. We live in galveston county so when it turned on we took it to autozone for the free code check - the code read was P20E8 and it just said emissions code. No specific readout was available for the code detected. The exact Jeep we own is a 2018 Jeep Grand Cherokee serling edition ecodiesel. We did notice that the def fluid was not properly filled to the full level upon the purchase so figured it could in relation to that. We drove back up to spring to the dealer and told them the issue and they said ok got us in a rental and then would call us as soon as it was ready. Once we picked it up it we asked what was the cause for the code and the technician said 'oh well it was nothing - just something that we forgot to turn off'. On the way home the check engine light again comes back on the dash. We stop by another Jeep dealer in the way home and inquired with them what they thought it might be and they said 'that whatever the dealership told you cannot be true'. Then bill or service or receipt said check engine light P20E8 was found def pump low pressure fault is stored, found tank low with less than 2 inches of fluid in take, found vehicle was not topped off when purchased, added def to tank and cleared codes and verified proper def fluid pressures at injector. The light remains on two days later and now a message pops on my dash and said 'def system problems see dealer'. Normally i would not be so upset but this a brand new car the dealer (not mentioned) was not exactly helpful dropping off or receiving the vehicle back with any kind of helpful information. I love my car and just want to make sure it can be properly fixed so i hopefully do not have to worry about my safety or the integrity of my car.
FUEL/PROPULSION SYSTEM, POWER TRAIN ENGINE

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