23 MIL on, no start or rough running (DTCs P0087, P0088, P0191)
23 17 39 2040752/6 February 13, 2017. Supersedes Technical Service Bulletin Group 23 number 15-37 dated
November 20, 2015 for reasons listed below.
Model(s)

Year

VIN Range

Vehicle-Specific Equipment

A3

2010 - 2012

All

TDI clean diesel

Q7

2009 - 2012

All

TDI clean diesel

Condition
REVISION HISTORY
Revision

Date

Purpose

6

-

Revised Service (Added information on fuel sampling and analysis)
Revised Required Parts and Tools (Updated part numbers)

5

11/20/2015

Revised Service (Completely revised step 5 under High pressure fuel
pump replacement and fuel system repair)
Revised Warranty (Added labor operation 2050 1901 under Q7)
Revised Required Parts and Tools (Added Fuel delivery unit and fuel
gauge sender under A3; added suction pump and updated quantity of
seal rings under Q7)

4

07/17/2015

Revised Required Parts and Tools (Updated part numbers for Q7 fuel
supply module)

 MIL on.
 Vehicle either runs roughly or does not start.
One or more of the following DTCs is stored in the engine control module (ECM), J623 (address word 0001):
 DTC P0087 (Fuel rail/system pressure - too low)
 DTC P0088 (Fuel rail/system pressure - too high)
 DTC P0191 (Fuel rail pressure sensor “A” circuit range/performance)

Page 1 of 11
© 2017 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.

Technical Background
Metallic particles in the high pressure fuel pump may cause the condition.

Production Solution
Not applicable.

Service
Note:
Before proceeding, perform all GFF diagnostic procedures and check all components to determine a root cause of
the condition, including testing supply pressure to the high pressure fuel pump (low pressure side) and checking
for internal leakage from the injectors and N276 pressure regulating valve.
If no root cause can be found, use the following procedure to check for metallic particles in the high pressure fuel
pump.
Initial diagnosis of high pressure fuel pump:
1. Prepare to remove the N290 fuel metering valve
by first cleaning the area around the valve then
drying the area using compressed air (Figure 1).
All debris must be removed from the area to
ensure that no debris enters the fuel system and
causes damage.
More information is available in the Elsa Repair
Manual at Engine>>Fuel Supply
System>>General Repair Information>>Clean
Working Conditions.

Figure 1. Area surrounding N290 fuel metering
valve.

Page 2 of 11
© 2017 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.

2. Remove the N290 fuel metering valve, and inspect
both the valve and valve bore for metallic particles
(Figure 2).

Figure 2. N290 fuel metering valve and valve
bore shown with and without metallic particles.
3. If metallic particles are found:
 This bulletin applies.
 The high pressure fuel pump and major
components of the fuel system will need to be
replaced. Proceed to the next section for
instructions.
If metallic particles are not found:
 This bulletin does not apply.
 Reinstall the N290 fuel metering valve using
light pressure. Before reinstalling, ensure that
the valve is free of contaminates.
 Install and hand-tighten both M5 fasteners,
ensuring that the threads are clean and dry
(pre-tighten to 2 Nm, then to 6.5 - 7 Nm).

Figure 3. N290 fuel metering valve O-rings.

Note:
Before reinstalling the N290 fuel metering valve,
check the O-rings for damage (Figure 3). If any
damage is found, the high fuel pressure pump
must be replaced outside of this bulletin.

Page 3 of 11
© 2017 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.

To prevent damage to the O-rings during
reinstallation of the valve, lubricate the O-rings
with diesel fuel.

Fuel sampling and analysis:
Before any repairs are performed, a fuel sample must be taken and analyzed. Do not substitute results
from the VAS6774 fuel tester.
1. Order the fuel sample kit (part number
LQ1LKIT) from the Compliance Label
Ordering Portal under Service in AccessAudi
(Figure 4).
 A valid extension VIN must be used to
order the kit.
 The fuel sample kit will be sent to the
dealership within one business day (note
that dealerships in Alaska and Hawaii will
be contacted by Audi of America with
further instructions after the kit is ordered).
The fuel sample kit contains a prepaid
shipping label, all necessary packaging,
and instructions for sending the sample to
a designated test facility.
Note:
HAZMAT certification is required for packaging
the fuel sample, but NOT for shipping. The
fuel sample can be shipped to the laboratory
through ground shipment services, provided
that the dealer is using the Limited Quantity Kit
(PN# LQ1LKIT).
Figure 4. Compliance Label Ordering Portal.
Test results will be provided to the dealership
within three days of receipt of the sample.

Page 4 of 11
© 2017 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.

2. Review the test results. The results will be
marked “PASS” or “FAIL” in the comments
section of the certificate of analysis (Figure 5
and Figure 6).

Figure 5. Example of a clean fuel sample analysis.

Figure 6. Example of a contaminated fuel sample
analysis.
3. See Warranty Extension Bulletin AWA-15-05 for details regarding high pressure fuel pump
coverage eligibility.
Tip: Remember to include the fuel sample kit number in the repair order comments.

High pressure fuel pump replacement and fuel system repair:

Page 5 of 11
© 2017 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.

Before proceeding, check ElsaPro for the latest information and detailed instructions for removal and
replacement of the components listed in this TSB.
1.

Use suction pump VAS5226 to clean the fuel delivery unit and fuel tank.

2.

Fill the fuel tank with five liters of fresh diesel fuel.

3.

Use suction pump VAS5226 to completely drain the fuel tank.

4.

Replace the in-tank fuel pump.

5.

Replace the suction jet pump.

6.

Following the instructions in the Elsa repair manual, replace the following components:
 High pressure fuel pump (note that the supply and return line orientation for the HPFP may be
reversed on updated pumps installed on vehicles manufactured before 05/25/2010)
 High pressure fuel lines
 Fuel rail (with both sensors included)
 All fuel injectors
 Fuel return lines (overflow oil lines)
 Fuel filter
 Fuel filter housing
 Auxiliary fuel pump

7.

After replacements are complete, fuel the vehicle.

8.

Ensure that the fuel injector return line is properly seated and sealed.

9.

Using the VAS tester, perform the “Vent Fuel System” Guided Function. See the Elsa repair manual
at Engine>>Fuel Supply System>>20 Fuel Supply>>Fuel System, Bleeding for additional
information.
Tip: If the test plan is unavailable through Guided Functions, switch to Self Diagnosis>>Engine
Electronics>>Basic Settings>>35, and perform the basic settings three times consecutively. For
UDS vehicles, perform basic settings for initial fueling.

10. Once the repairs are complete, test drive the vehicle.
11. Inspect for fuel seepage at the fuel injector return line connector. If seepage is found, the condition
must be corrected.

Page 6 of 11
© 2017 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.

Warranty
Claim Type:

 110 – Verify Vehicle Warranty Coverage.
 G10 for CPO Covered Vehicles – Verify Owner.
 If vehicle is outside any warranty, this Technical Service Bulletin is
informational only.

Service Number:

2374

Damage Code:

0010

Labor Operations:

For Q7:
Fuel bleed

2003 0750

10 TU

Fuel tank cleaned

2010 2999

50 TU

Diesel fuel filter remove
+ reinstall

2034 1900

40 TU

Supply line cleaned

2038 2999

10 TU

Return line cleaned

2039 2999

10 TU

2 electric fuel pump
remove + reinstall

2066 2000

190 TU

Suction jet pump remove 2050 1901
+ reinstall

190 TU

2 distribution rail remove
+ reinstall

2373 2047

130 TU

6 injector remove +
reinstall

2340 2047

340 TU

High-pressure pump
remove + reinstall

2374 1947

220 TU

Online fuel analysis

2374 0199

20 TU

For A3:

Page 7 of 11
© 2017 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 Time:

Fuel bleed

2003 0750

10 TU

Fuel tank cleaned

2010 2999

50 TU

Diesel fuel filter remove
+ reinstall

2034 1951

20 TU

Supply line cleaned

2038 2999

10 TU

Return line cleaned

2039 2999

10 TU

Electric fuel pump
remove + reinstall

2066 1900

110 TU