A801304 2033806-

Technical Service Bulletin
80 Coolant loss from coolant valve, engine warning light on, "Limp Home" mode active
80 13 04 2033806/3 August 9, 2013. Supersedes Technical Service Bulletin Group 80 number 13-03 dated May
13, 2013 for reasons listed below.
Model(s)
Year
A6 \ A7
2012 - 2013
A8
2010 - 2013
Audi Q7
2011 - 2013
A5 Cabriolet
2012 - 2013
TT
2012 - 2013
A4
2012 - 2013
Q5
2012 - 2013
A5
2012 - 2013
VIN Range
Vehicle-Specific Equipment
All
Not Applicable
Condition
REVISION HISTORY
Revision
Date
Purpose
3
-
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.
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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
• 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.
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.
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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
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.
Production Solution
Improved coolant control valves are in development.
© 2013 Audi of America, Inc.
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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
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.
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 ElsaWeb for the specific model being serviced for this concern:
For solenoid valve N82:
See ElsaWeb for applicable labor operations
XX TU
For solenoid valves N488 or N509:
Diagnostic Time:
See ElsaWeb 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 #2033806/3
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.
© 2013 Audi of America, Inc.
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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
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
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.
© 2013 Audi of America, Inc.
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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.