Technical Service Bulletin
19 Red coolant warning lamp on, DTCs P218100, P017B00, P017C00, and/or P017E00 are stored in the
ECM
19 24 73 2062951/4 December 3, 2024. Supersedes Technical Service Bulletin Group 19 number 23-41 dated
September 7, 2023 for reasons listed below.
Model(s)

A8

Year

VIN Range

2019 – 2020

All

2021

000001 – 007769

2020

All

2021

000001 – 007769

2020

All

2021

000001 – 015609

2020

All

2021

000001 – 010457

2020

All

2021

000001 - 011352

2021

900001 - 901935

S8

SQ7

SQ8

RS Q8
RS 6 Avant, and
RS 7

Vehicle-Specific Equipment

Not Applicable

REVISION HISTORY
Revision

Date

Purpose

4

-

Revised Condition (updated TSB reference)
Revised Warranty (Updated Claim Types, Labor Operations)

3

09/07/2024

Revised Condition (Updated workshop findings)

2

10/21/2022

Revised Warranty (Updated Labor Ops)

Customer states:
•

Red coolant warning lamp is illuminated in the instrument cluster.

Workshop findings:

© 2024 Audi of America, Inc.
Internal

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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 Service Bulletin
One or more of the following DTCs must be stored in the engine control module (ECM), J623 (address word
0001):
•

DTC P218100 (Malfunction in cooling system).

•

DTC P017B00 (Cylinder head temperature sensor implausible signal).

•

DTC P017C00 (Cylinder head temperature sensor short circuit to ground).

•

DTC P017E00 (Cylinder head temperature sensor open circuit/loose contact).

If DTCs P1BB400 or P218100 are also stored in the ECM, please also review TSB 2075878 to determine
the appropriate action.

Technical Background 1
Damage to the O-ring of the temperature sensor can cause water intrusion inside the plastic housing of the
coolant temperature sender G407 (cylinder head temperature sensor). The moisture can damage the sensor
element. The loss of function can be sporadic.

Production Solution
Improved part in production.
Vehicle type

Chassis number

Vehicle production date

A8

WAURSCF88MN007770

27/10/2020

S8

WAURSEF82MN005380

07/10/2020

SQ8

WA1CWBF17MD010458

30/09/2020

SQ7

WA1VWBF75MD015610

30/09/2020

RS 6/7

WUAPCBF25MN901936

14/10/2020

RS Q8

WUARRDF11MD011353

06/10/2020

Service
1. Work through Guided Fault Finding.

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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 Service Bulletin
2. It is very important to also check whether the oring located directly on the tip of the coolant
temperature sender G407 is visibly damaged
and/or pinched (Figure 1).

Figure 1. O-ring is pinched.
3. Replace the G407 if the o-ring is damaged and/or pinched.

Warranty
Claim Type:

•

Service Number:

1978

Damage Code:

0040

Labor Operations:

Remove and install temperature sender

1978 19XX

See SRT with
associated operations

GFF

0150 0000

Time stated on the
diagnostic protocol

Charge battery

2706 8950

See SRT with
associated operations

© 2024 Audi of America, Inc.
Internal

If the vehicle is outside any warranty, this Technical Service Bulletin is
informational only.

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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 Service Bulletin
Claim Comment:

As per TSB 2062951/4

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

See ETKA

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

See ETKA/ELSA

See ETKA

Coolant temperature sender G407 (if necessary)

01

Tool Number

Tool Description

VAS 6160/VAS 6150

VAS tester with the current version of ODIS (Windows 10)

Additional Information
All parts and service references provided in this TSB (2062951) are subject to change and/or removal.
©2023 Audi of America, Inc. All rights reserved. The 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.

© 2024 Audi of America, Inc.
Internal

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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.