Technical Service Bulletin
01 MIL on due to lambda sensor malfunction
01 15 40 2014825/4 August 19, 2015. Supersedes Technical Service Bulletin Group 97 number 08-29 dated
December 22, 2008 for reasons listed below.

Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A8

2005 - 2007

All

W12 engine

Condition
REVISION HISTORY
Revision

Date

Purpose

4

-

Revised header data (Added customer code; added DTCs)
Revised Warranty (Updated Claim Type)

3

12/22/2008

Revised Title to add Repair Group

• MIL on.
• One of the following DTCs is stored in the engine control module, J623 (address word 01):
• DTC P2237 (O2 Sensor Positive Current Control Circuit Bank 1 Sensor 1 Open),
• DTC P2240 (O2 Sensor Positive Current Control Circuit Bank 2 Sensor 1 Open),
• DTC P2626 (Linear Lambda Probe, Exhaust Bank 1/ Balance Wire Pump Current, Open),
• DTC P2629 (Linear Lambda Probe, Exhaust Bank 2/ Balance Wire Pump Current, Open),
• DTC P3148 (Exhaust Bank 3, Sensor 1 Heater Control at Upper Limit),
• DTC P3150 (Exhaust Bank 4, Sensor 1 Heater Circuit Control at Lower Limit),
• DTC P3161 (Linear Lambda Probe, Exhaust Bank 1/ Balance Wire Pump Current, Open),
• DTC P3162 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 2, Sensor 1),
• DTC P3163 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 3, Sensor 1),
• DTC P3164 (O2 Sensor Pumping Current Trim Circuit/ Open Bank 4, Sensor 1),
• DTC P3255 (Bank 1, Oxygen Sensor Before Catalytic, Heater Circuit Regulation at Upper Impact),
• DTC P3257 (P3257, Bank 2, Oxygen Sensor Before Catalytic, Heater Circuit Regulation at Upper Stop),
• DTC P3278 (Linear Lambda Probe, Exhaust Bank 3/ Pump Current Open),
• DTC P3268 (Linear Lambda Probe, Exhaust Bank 2/ Pump Current Open),
• DTC P3288 (Linear Lambda Probe, Exhaust Bank 4/ Pump Current Open).

© 2015 Audi of America, Inc.

Page 1 of 4

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
Faulty lambda sensor and/or resistance on the electrical contacts for lambda sensor wiring.

Production Solution
Not applicable.

Service
1. Replace the lambda sensor that triggered the fault memory entry.
2. Solder the electrical contacts for all lambda sensors to their respective wires (engine harness side only) by
performing the procedure below:
a. Disconnect engine harness from sensor (Figure 1).

Figure 1. Lambda sensor connector.
b. Remove secondary lock from connector (Figure 2).

Figure 2. Secondary lock, shown
partially removed from the lambda
sensor connector.

© 2015 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
c. Remove contact from connector using VAS 1978/4A tool (Figure
3).

Figure 3. Contact, shown removed from
connector.
d. Solder crimp connection while making sure solder area is clean,
is heated thoroughly, and that an appropriate amount of solder is
used (Figure 4).

Figure 4. Location to solder.
e. Allow contact to cool. Reinstall contact with secondary lock and
reconnect to sensor (Figure 5)

Figure 5. Sensor, reconnected.
3. Perform the procedure one contact and one sensor at a time until all contacts for the lambda sensors are
soldered.

© 2015 Audi of America, Inc.

Page 3 of 4

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:

9713

Damage Code:

0021

Labor Operations:

Engine compartment wiring repair

9713 9999

200 TU

Diagnostic Time:

GFF

No allowance

0 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 #2014825/4

Required Parts and Tools
Part Number

Part Description

Quantity

See ETKA

Lambda sensor

As needed

VAS 1978/4A

Contact removal tool

1

Additional Information
All parts and service references provided in this TSB (2014825) are subject to change and/or removal. Always
check with your Parts Department and service manuals for the latest information.

© 2015 Audi of America, Inc.

Page 4 of 4

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.