TT 26 18 01

Technical Tips
Technical Tip
Topic
26-18-01TT – DTCs P20EE, P204Fand or P207F Stored in ECM Fault Memory
Market area
United States 444 Volkswagen of America, Inc. (6444)
Brand
Volkswagen
Date
August 3, 2018
Condition
ATTENTION:
THIS IS A TECH TIP, NOT A TECHNICAL BULLETIN.
TECH TIPS ARE NOT ASSOCIATED WITH WARRANTY CLAIMING.
DTCs P20EE, P204F and or P207F Stored in ECM Fault Memory
Model(s)
Year
Touareg
2011-2016
Eng. Code
3.0L TDI
(CNRB)
Trans. Code
VIN Range From
VIN Range To
All
All
All
Technical Background
Poor Adblue quality may result in DTCs.
DTC
Description
P20EE
SCR NOx Catalyst Efficiency Below Threshold Bank 1
Catalyst 1
P204F
Reductant System Performance Bank 1
P207F
Reductant Quality Performance
Service
Check AdBlue® quality using Special tool T100007 refractometer. The mixture should be 32% (+/- 1.5%).
If the refractometer reading for the mixture is less than 30% or greater than 35%, replace the AdBlue®. Refer to ETKA
for the latest part numbers.
If AdBlue® concentration is within specifications, address any other faults stored in the ECM first.
After all SCR faults have been addressed, Go to ECM control module OBD, select resetting learning values for the
reduction agent metering system; Checking reduction medium quality and check of SCR efficiency.
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Technical Tips
Additional Information
Revision History
Revision Number
Released Date
Reason For Update
2052089/1
8/3/18
Original publication.
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