Technical Service Bulletin

01-23-08 - Update Programming Various EVAP Fault Codes Stored
in Engine/Motor Control Module -J623-

Transaction No:

2070690/1

Release date:

8/17/2023

Condition
Applicable Vehicles
Model(s)

Year

Eng. Code

Trans. Code

VIN Range
From

VIN Range To

Taos

2023

1.5T

All

All

All

All

All

All

(DKNA)
Jetta

2023

1.5T
(DKNA)

Revision Table
Instance Number

Published Date

Version Number

2070690/1

08/17/2023

01-23-08

Reason For Update
Original publication.

Customer states MIL-ON with various fault codes found in the Updated Engine/Motor Control Module J623-.

Technical Background
One or more of the following fault codes may be stored in the Updated Engine/Motor Control Module J623- (ECM) Fault Memory:
DTC

Description

P2421

EVAP System Vent Valve Stuck Open

P2422

EVAP System Vent Valve Stuck Closed

P2025

EVAP Fuel Vapor Temperature Sensor Performance

P24D6

EVAP System Pressure Sensor/Switch "B" Circuit
Range/Performance

P2B7B

EVAP System Pressure Sensor/Switch "C" Circuit
Range/Performance

P0456

EVAP Emission Contr. Sys. (very small Leak) Leak
Detected
Page 1 of 7 Plus attachment

© 2023 Volkswagen Group 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 Volkswagen Group 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 Service Bulletin

01-23-08 - Update Programming Various EVAP Fault Codes Stored
in Engine/Motor Control Module -J623-

Transaction No:

2070690/1

Release date:

8/17/2023

P0169

Incorrect Fuel Composition active/static

P30C0

Fuel quality poor active/static

Note:
DO NOT diagnose or replace components due to P2421, P2422, P2025, P24D6, P2B7B, P0456, P0169
and/or P30C0 faults before performing the update function as explained in this bulletin.

Production Solution
Updated Engine/Motor Control Module -J623- software introduced in production.

Service
Update-Programming Procedure:
Critical Warning: : The Midtronics battery charger must be connected to the vehicle battery for the
duration of the programming, to ensure the battery state of charge remains above 12.5 volts during the
update process. If the battery drops below 12.5 volts, the programming could fail which may result in
damage to the control module. Control modules damaged by inadequate voltage will not be covered
under the warranty policy.The technician should verify the vehicle voltage prior to starting the update
process, and should monitor the voltage for the duration of the update.
The procedure may cancel itself if the hazard warning lights are not switched ON. The hazard warning
lights prevent the system from switching to bus sleep mode during the update.
ODIS-Service tester should be updated to the latest GFF technical version 11.0.0 or higher and SW
version 2.47.0 or higher.

WARNING:
Radiator Fan(s) may cycle ON high speed during the Update Process! There is a risk that personal
injury may result if contact is made with spinning fan blades.
Keep hands and all objects away from Radiator Fan(s) during Update Process!

Page 2 of 7 Plus attachment
© 2023 Volkswagen Group 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 Volkswagen Group 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 Service Bulletin

Transaction No:

2070690/1

Release date:

8/17/2023

01-23-08 - Update Programming Various EVAP Fault Codes Stored
in Engine/Motor Control Module -J623-

Note:
Prior to launching the ODIS Service diagnostic applications and starting control module update process,
confirm tester screen saver and power settings in accordance with Diagnostic Device Hardware &
Windows® - VHW-20-02 Change Power Options After Windows®10 Upgrade. Failure to do so may result
in the tester entering power save mode during data transfer, and subsequent control module failure.
When using a VAS 6150/X or 6160/X tester in conjunction with a VAS 6154 wireless transmitter head for
a flash procedure, connect a USB cable between the transmitter head and the tester. Failure to do so
may lead to errors during the flash procedure.
VAS tools must only be used with their power adapters plugged in. Under no circumstances should they
be used on battery power alone during the programming procedure.
Tip:
To Update-Programming using Software Version Management (SVM), review and follow instructions in
Technical Bulletin Instance 2014603 “Software Version Management”.
The SVM process must be completed in its entirety so the database receives the update confirmation
response. A warranty claim may not be reimbursed if there is no confirmation response to support the
claim or action is carried out that is not explicitly stated in the Technical Bulletin.

Update the Engine/Motor Control Module -J623- using the SVM Unit code as listed in the table below:

Model

Engine

Old Software
Part No.

Old
Software
Version

New Software
Part No.

New
Software
Version (or
higher)

SVM Unit
Code

Taos

1.5T

05E906013BC

3109

05E906013BC

3314

4C6D

05E906013BD

3315

DKNA

2645
2495
2251
1845
05E906013BD

3110
2646
2496
2252
1846

Page 3 of 7 Plus attachment
© 2023 Volkswagen Group 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 Volkswagen Group 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 Service Bulletin

Transaction No:

2070690/1

Release date:

8/17/2023

01-23-08 - Update Programming Various EVAP Fault Codes Stored
in Engine/Motor Control Module -J623-

05E906013BF

3113

05E906013BF

3317

05E906013BH

3319

05E906013BE

3316

05E906013BG

3318

05E906013BA

3322

05E906013BB

3321

2648
2515
2336
2136
05E906013BH

3114
2650
2516
2339
2137

05E906013BE

3112
2649