Technical Service Bulletin
80 Coolant loss from coolant valve, engine warning light on, "Limp Home" mode active, cabin heating is
insufficient
80 14 06 2033806/5 March 11, 2014. Supersedes Technical Service Bulletin Group 80 number 13-05 dated
September 11, 2013 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A6 / A7

2012

000001 - 999999

Not Applicable

A6 / A7

2013

000001 - 155596

Not Applicable

A8

2010 - 2012

000001 - 999999

Not Applicable

A8

2013

000001 - 034562

Not Applicable

Audi Q7

2011 - 2013

000001 - 999999

Not Applicable

Audi Q7

2014

000001 - 000973

Not Applicable

A5 Cabriolet

2012 - 2013

000001 - 999999

Not Applicable

A5 Cabriolet

2014

000001 - 999999

Not Applicable

A5 Cabriolet

2014

900000 - 900019

Not Applicable

TT

2012 - 2014

000001 - 999999

Not Applicable

A4

2012 - 2013

N000001 - N999999

Not Applicable

A4

2014

N000001 - N000184

Not Applicable

A4

2012

A000001 – A999999

Not Applicable

A4

2013

A000001 – A247958

Not Applicable

Q5

2012 - 2014

000001 - 999999

Not Applicable

A5

2012

000001 - 999999

Not Applicable

A5

2013

000001 - 077920

Not Applicable

A5

2013

900000 - 903086

Not Applicable

© 2014 Audi of America, Inc.

Page 1 of 6

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
Condition
REVISION HISTORY
Revision

Date

Purpose

5

-

Revised title

4

9/11/2013

Revised header data (Added model years)

3

8/9/2013

Revised header data (Updated customer codes)
Revised Required Parts and Tools (Updated part numbers)

2

5/13/2013

Revised Warranty (Updated labor operations)

1

5/9/2013

Initial publication

• The customer may have one or more of the following concerns:
• Malfunction Indicator Lamp is on.
• Climate system heating performance is insufficient.
• Coolant level warning is on.
• Engine temperature is elevated.
• “Limp Home” mode is active.
• The results of the diagnosis based on the customer complaint may reveal one or more of the following:
• One of the following faults is stored in the transmission control module (address word 02):
- DTC P275300 (Transmission Fluid Cooler Control Circuit Open)
- DTC P275500 (Transmission Fluid Cooler Control Circuit High)
• Coolant loss is found from one or more control valves: N82, N509, or N488. Coolant may have migrated into
the wiring harness through the connector and into various control units.
• Climate system heating performance is insufficient due to coolant loss, or due to a faulty N82 control valve.

© 2014 Audi of America, Inc.

Page 2 of 6

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
Technical Background
Inspection of the coolant control valves N82,
N509, or N488 reveals the presence of coolant
inside the electrical connector as shown in the
illustration (Figure 1).

Figure 1. Coolant residue in the connector housing of the
coolant regulating valve.
The connectors, wiring harness, and/or
connected control units may have been
damaged from exposure to coolant (Figure 2).

Figure 2. Corrosion formation on the connector pins.

© 2014 Audi of America, Inc.

Page 3 of 6

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
Production Solution
Improved coolant control valves are in development.

Service
1. Diagnose the defective coolant valve (N82, N509, or N488) using Guided Fault Finding where stored DTCs are
found.
2. Replace the defective coolant valve.
Tip: Check the connectors, wiring harness, and connected control units for coolant damage. Perform repairs
as necessary.

© 2014 Audi of America, Inc.

Page 4 of 6

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
Warranty
Claim Type:

Use applicable claim type. If vehicle is outside any warranty, this Technical
Service Bulletin is informational only.

Service Number:

8015

Damage Code:

0050

Labor Operations:

See Elsa for the specific model being serviced for this concern:
For solenoid valve N82:
See Elsa for applicable labor operations

XX TU

For solenoid valves N488 or N509:

Diagnostic Time:

See Elsa for applicable labor operations

XX TU

GFF

01 50 00 00

Time stated on diagnostic
protocol (Max 50 TU)

Road test prior to service
procedure

No allowance

0 TU

Road test after service
procedure

No allowance

0 TU

Technical diagnosis at dealer’s discretion
(Refer to Section 2.2.1.2 and Audi Warranty Online for DADP allowance details)
Claim Comment:

As per TSB #2033806/5

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
Please reference ETKA using the VIN of the subject vehicle to ensure that the correct valve is being
ordered.
Part Number

Part Description

Quantity

4H0121670A

Solenoid valve

1

4H0121671D

Solenoid valve

1

© 2014 Audi of America, Inc.

Page 5 of 6

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
Additional Information
All parts and service references provided in this TSB (2033806) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.

© 2014 Audi of America, Inc.

Page 6 of 6

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.