01 MIL on, DTC P20E900 or P20FE00 stored in ECM
01 18 80 2034359/4 July 30, 2018. Supersedes Technical Service Bulletin Group 01 number 18-66 dated April
19, 2018 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

Q7

2012 - 2015

All

TDI

Condition
REVISION HISTORY
Revision

Date

Purpose

4

-

Revised Service (Updated Step 4)
Revised Warranty (Updated Labor Operation)
Revised Additional Information (Added reference)

3

04/19/2018

Revised header data (Updated VIN breaks)
Revised Service (Updated Step 4)

2

04/17/2018

Revised title (Added DTC)
Revised Condition (Added DTC)
Revised Warranty (Added Claim Types)
Revised Service (Added Steps 3 and 4, added photos, and updated order)
Revised Required Parts and Tools (Updated Part Numbers)

Customer states:
 MIL on.
Workshop findings:
One of the following DTCs is stored in the engine control module (ECM), J623 (address word 0001):
 DTC P20E900 (Reductant pressure too high).
 DTC P20FE00 (Reductant metering unit performance).

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© 2018 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Technical Background
In vehicles produced during a certain period, the AdBlue filter seal within the level sensor module may have been
damaged during the assembly process or the AdBlue filter housing may come loose over time. This can allow
unfiltered AdBlue to be drawn into the delivery system, subsequently damaging the pressure sensor and reducing
agent pump V437.

Production Solution
Vehicle out of production. Service solution is an improved level sensor module.

Service
1. In cases with the above fault codes, remove the active tank according to instructions in the Elsa Repair
Manual.
2. Remove the G684 Reducing Agent Tank level sensor.
3. Inspect the reducing agent filter housing which should be
clipped to the G684 level sensor module. If the filter housing is
loose (see Figure 1 and Figure 2), then the G684 level sensor
AND the V437 reducing agent pump must be replaced.

Figure 1. Filter element housing loose
inside tank.

Page 2 of 5
© 2018 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Figure 2. Filter element housing loose
inside tank.
4. If the filter is properly secured and only the P20E900 fault is present, clear the DTC and perform an SCR
Metering Quantity Test to ensure the lines are purged of air. Do not replace any parts.
Note:
See Reduction agent injector testing – UDS video on the Audi Academy website for more information on how
to access the SCR Metering Quantity Test. It is found under Basic Settings.
Note:
If the vehicle returns with the P20FE fault after the DTC has been cleared and the lines have been purged
(assuming filter is secure), please contact the Technical Assistance Center (TAC) for further instructions.
5. Top off AdBlue level when repairs are complete.

Page 3 of 5
© 2018 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Warranty
Claim Type:

 110 up to 48 Months/50,000 Miles.
 G10 for CPO Covered Vehicles – Verify Owner.
 If vehicle is outside any warranty, this Technical Service Bulletin is informational
only.

Service Number:

2682

Damage Code:

0050

Labor Operations:

Reductive agent container remove + reinstall

2681 1900

120 TU

Level sensor module remove + reinstall

2682 1999

30 TU

SCR Metering Quantity Test (If applicable)

2685 1999

60 TU

Reductive agent inspect + add

2688 3500

20 TU

GFF

0150 0000

Time stated on
diagnostic
protocol (Max 20
TU)

Road test prior to service procedure

No allowance

0 TU

Road test after service procedure

No allowance

0 TU

Diagnostic Time:

Claim Comment:

As per TSB #2034359/4

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.

Required Parts and Tools
Always check with your Parts Department and/or ETKA for the latest information and parts bulletins.
Part Number

Part Description

Quantity

4L0131907D

Storage Unit (G684 level sensor module)

01 (If applicable)

4L0131899M

V437 Pump for reduction agent

01 (If applicable)

See ETKA

Fasteners, Bolts, Nuts and Screws as needed
per the Repair Manual

See ETKA/ELSA

Page 4 of 5
© 2018 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.

Additional Information
All parts and service references provided in this TSB (2034359) are subject to change and/or removal.
More information on this system can be found in the following resources:
 Audi Academy (see Basic Settings), Reduction agent injector testing – UDS
©2018 Audi of America, Inc. All rights reserved. Information contained in this document is based on the latest
information available at the time of printing and is subject to the copyright and other intellectual property rights of
Audi of America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any
time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted in
any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these
materials be modified or reposted to other sites without the prior expressed written permission of the publisher.

Page 5 of 5
© 2018 Audi of America, Inc.
All rights reserved. Information contained in this document is based on the latest information available at the time of printing and is subject to the copyright and other intellectual property rights of Audi of
America, Inc., its affiliated companies and its licensors. All rights are reserved to make changes at any time without notice. No part of this document may be reproduced, stored in a retrieval system, or transmitted
in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, nor may these materials be modified or reposted to other sites, without the prior expressed written permission of the
publisher.