It is recommended that after cleaning, all single ports
are checked with snap-on boroscope BK6000 (or
similar, with 90-degree lens), to make sure all ports
are clean (Figure 17).

Figure 17. Clean single port.
7.

When all carbon is removed, install a new main port plug using an 8mm socket with a short extension,
paying special attention to install it squarely. The outer edge of the plug should be recessed ~0.5mm – 1mm
behind the outer cylinder head edge.

8.

Reinstall all components (except spark plugs) and fill the system with coolant according to ELSA.

9.

Using a vacuum extractor, remove all water from all combustion chambers.

10. Make sure all water is removed from the combustion chambers by using the self-start function twice
while the spark plugs are still removed (cover spark plug openings with a towel). Install spark plugs and
coils.

Page 9 of 14
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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.

Make sure water is completely drained out of the exhaust (make sure the exhaust is lowered enough).
Tip: There is no need to replace the engine oil; almost no water drains into the oil pan.
11. Allow the car to run at idle for 15 minutes to ensure that any remaining water in the exhaust system
evaporates.
Section 5: After Power Washing
1.

Delete all DTCs. Bring engine to operating temperature.

2.

Go to Control Modules >> 01 Engine Control Module >> Control module OBD >> Basic Settings >>
Checking Secondary Air System.

3.

Select MVB: MASS_SA_REL[0] or SAF_DIF[1] and MASS_SA_REL[1] or SAF_DIF[2].

4.

Perform test (Press brake and gas pedal at the same time, start test on ODIS tester).

5.

Immediately after the test is complete, read MASS_SA_REL[0] or SAF_DIF[1] and MASS_SA_REL[1] or
SAF_DIF[2].
 For the old software version:
If the value is between 0.9 and 1.0, the cleaning was successful.
 For the new software version:
If the value is between 0 and 5, the cleaning was successful.

Warranty
Claim Type:

 1EB – Verify Vehicle Warranty Coverage.
 If the vehicle is outside any warranty, this Technical Service Bulletin is informational
only.

Service Number:

2644

Damage Code:

0010

Labor Operations:

Coolant pipe remove + reinstall

1961 1906 (Q5 CALB, A6 See SRT with
associated
CALA, and A5 CALA)
operations
Or
1961 1941 (A6 CCAA,
A6/A7 CGXB, A6/A7
CTUA, S4, S5, S5 Cab
CCBA & CGXC, A8

Page 10 of 14
© 2021 Audi 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 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.

CTUB, and Q5 CTUC &
CTUD)
Or
1961 2039 (Q7 CJWE,
CJWC, CJWB, and
CTWB)
Power steering pump remove + reinstall
(overlap reduced includes time for exhaust
and spark plugs)

4898 1999 (Q5 CALB,
60 TU
CTUC, CTUD, A6 CCAA
& CALA, A6/A7 CGXB,
A5 CALA, A8 CTUB, S4,
S5, S5 Cab CCBA &
CGXC, Q7 CJWE,
CJWC, CJWB, and
CTWB)
Or
2870 2099 (A6/A7 CTUA)

Loosen/fasten lock carrier (Except Q7
CJWE, CJWC, CJWB, and CTWB)

5038 0999 (A6/A7
220 TU
CGXB, Q5 CALB, CTUC, Or
& CTUD, A6 CCAA &
CALA, A5 CALA, S4, S5, 290 TU
S5 Cab CCBA, and A8
CTUB)
Or
5038 0999 (A6/A7 CTUA)

Pressure wash

2644 1999 (All)

ACC Calibration

75 TU
See SRT with
associated
operations

Note:
The following labor operations only apply if
the vehicle is equipped with ACC. Only
claim these labor operations if applicable
and if necessary.
Radar sensor adjust (if equipped)

See Elsa

9163 1550 (Q5 CALB,
See SRT with
CTUC, & CTUD, S4, S5, associated
S5 Cab CCBA & CGXC, operations
A6 CCAA & CALA, A5
CALA and Q7 CJWE,
CJWC, CJWB, & CTWB)

Page 11 of 14
© 2021 Audi 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 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.

Or
9163 1650 (A6/A7
CGXB, A6/A7 CTUA,
and A8 CTUB)
Preparation Driver Assist Calibration

9092 0051 (All)

See SRT with
associated
operations

Vehicle front + rear measure

4495 0350 (All)

See SRT with
associated
operations

Front wheel track adjust

4488 1550 (All)

See SRT with
associated
operations

Rear wheel track adjust

4493 1550 (All)

See SRT with
associated
operations

Front wheel camber adjust

4489 1550 (Q5 CALB,
See SRT with
associated
CTUC, & CTUD, Q7
CJWE, CJWC, CJWB, & operations
CTWB, A6/A7 CTUA, A6
CALA & CCAA, A5
CALA, A6/A7 CGXB, A8
CTUB, and S4/S5 CCBA
& CGXC)

Rear wheel camber adjust

4494 1550 (Q5 CALB,
See SRT with
associated
CTUC, & CTUD, A6
operations
CALA & CCAA, A6/A7
CTUA, A5 CALA, A6/A7
CGXB, A8 CTUB, Q7
CJWE, CJWC, CJWB, &
CTWB and S4/S5 CCBA
& CGXC)

Camera f night vision sys adjusted (if
equipped)

9080 1550
Or
See Elsa

Diagnostic Time:

GFF – Checking and clearing fault codes
included in existing labor operations

0150 0000

See SRT with
associated
operations
Time stated
on the

Page 12 of 14
© 2021 Audi 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 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.

diagnostic
protocol (Max
40 TU)

Claim Comment:

Road test prior to the service procedure

0121 0002

10 TU

Road test after the service procedure

0121 0004

10 TU

As per TSB #2033001/25

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

06E121119A or 06E121119E

O-ring cross pipe (3.2L and 3.0L respectively)

02

See ETKA

O-ring cross pipe (3.0L A8)

02

N 0119078

Freeze plug

02

06E121139E or 06E121139H

Seal coolant flange (3.2L and 3.0L respectively)

01

See ETKA

Seal coolant flange (3.0L A8)

01

See Parts Catalogue

Coolant

01

06E121119C

O-ring cross pipe to therm (3.0L only)

01

See ETKA

Steering Power Fluid

See ELSA

See ETKA

Fasteners, Bolts, Nuts, and Screws as needed per See ETKA/ELSA
the Repair Manual

Tool Number

Tool Description

VAS6825

Tool set

VAS6825/1

Adaptor set

CAM20005MX or equivalent Pressure washer

Page 13 of 14
© 2021 Audi 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 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.

Additional Information
All parts and service references provided in this TSB (2033001) are subject to change and/or removal.
©2021 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.

Page 14 of 14
© 2021 Audi 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 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.