Technical Service Bulletin

01-22-03 - Late Production - Update Programming Engine/Motor
Control Module -J623-

Transaction No:

2066602/2

Release date:

1/9/2025

Condition
Applicable Vehicles
Model(s)

Year

Eng. Code

Trans. Code

VIN Range
From

VIN Range To

Jetta

2020 - 2021

1.4T

All

All

All

DGXA

Revision Table
Instance Number

Published Date

Version Number

Reason For Update

2066602/2

1/9/2025

01-22-03

To remove original part
number and vendor in
warranty table.

2066602/1

3/29/2022

01-22-03

Original publication.

Customer states there is low or no heat output from the air vents under certain cold weather conditions.
This TB also proactively corrects faults listed below.

This software update also includes modification for: P0441, P04F0, P148D, P0496, P060C
(37682), P013E, P30DC and P2421 DTCs.
One or more of the following fault codes may be stored in the Engine Control Module (ECM) Fault
Memory:

DTC

Description

P0441

EVAP Emission Contr.Sys.Incorrect Purge Flow

P04F0

EVAP system high pressure purge line
performance

P148D

Evaporative Emission System Leak Detection
Pump implausible frequency

P0496

EVAP System High Purge Flow
Page 1 of 8 Plus attachment.

© 2025 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

01-22-03 - Late Production - Update Programming Engine/Motor
Control Module -J623-

Transaction No:

2066602/2

Release date:

1/9/2025

P060C (37682)

Internal Control Module Main Processor
Performance

P013E

O2 Sensor Bank 1 Sensor 2 Delayed Response Rich to Lean

P30DC

Pressure release for refueling gas tank not
possible

P2421 (MAY also require part replacement with
ECM flash - see below)

Evaporative Emission System Vent Valve Stuck
Open

DO NOT diagnose or replace components due to P0441, P04F0, P148D, P0496, P060C (37682),
P013E, P30DC and P2421 faults before performing the update function as explained in this
bulletin.

Technical Background
Current Engine/Motor Control Module -J623- software can cause low engine heat output or may lead to
various fault codes within the vehicle.

Production Solution
Improved Engine/Motor Control Module -J623- software.

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.
Page 2 of 8 Plus attachment.
© 2025 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

01-22-03 - Late Production - Update Programming Engine/Motor
Control Module -J623-

Transaction No:

2066602/2

Release date:

1/9/2025

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!

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.

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 Control Module using the SVM Unit code as listed in the table below:

Model

Engine

Old Software
Part No.

Old
Software
Version

Jetta

DGXA

04E 906 024
AB

Z842
6946

New
New
Software Part Software
No.
Version (or
higher)
04E 906 024
AB

9973

SVM Unit
Code

48A2

Page 3 of 8 Plus attachment.
© 2025 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

01-22-03 - Late Production - Update Programming Engine/Motor
Control Module -J623-

Transaction No:

2066602/2

Release date:

1/9/2025

9944
9970
9971
9972
Jetta

DGXA

04E 906 024
BC

946
9970

04E 906 024
BC

9973

48A2

04E 906 024
BB

9973

48A2

04E 906 024
BJ

2326

48A2

04E 906 024
BG

2324

48A2

04E 906 024
BH

2325

48A2

9971
9972
Jetta

DGXA

04E 906 024
BB

7401
9945
9970
9971
9972

Jetta

DGXA

04E 906 024
BJ

Z943
Z961
0907
1055
2049

Jetta