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Technical Service Bulletin
20 Fuel System DTC P014800 or P008700 stored in ECM

Transaction No.: 2079461/3
Release date: Dec 11, 2025

Condition
Model{s) Year(s) VIN Range Vehicle Specific Equipment
Q5, and SQ5 2018 — 2025
A4, A4 allroad, $4,
Ad Sportback, S5
Sportback, A6, A6
allroad, S6, A7, S7, 2020 — 2025
Q5 e quattro, Q7,
$Q7, Q8, SQ8, and
RS Q8
A5 Coupe, A5 .
Cabriolet, $5 Coupe,| 2020-2024 All Not applicable
and $5 Cabriolet
RS 5 Sportback, RS
6 Avant, RS 7, Q5
Sportback, and SQ5 2021 — 2025
Sportback
RS 5 Coupe 2021 — 2024
A7 e quattro 2021 - 2022
REVISION HISTORY
Revision | Date Purpose
3 - Revised header (Added Q5)
Revised Condition (Updated model table)
Revised Warranty (Updated Service Number)
2 11/19/2025 | Revised Condition (Added model table)
Revised Warranty (Revised Service Number)
1 10/14/2025 | Initial publication
Customer states:

* — MIL light is on or the limp-home function activates.

Workshop findings:

The following DTCs are logged in the Engine Control Unit -J623-, (address word 0001):
* P014800: Fuel Delivery Error
or

* 008700: Fuel Rail/System Pressure - Too Low

Technical Background
Not applicable.

Production Solution
Not applicable.

Service

Clear the DTCs P014800 and P008700 from the Engine control unit. If the DTC(s) are set again, perform the tests
connected to testing the low-pressure pump per the repair manual ELSA, please note if fault does not reset and
vehicle is in for the first time no further diagnosis is required:

* “Checking fuel delivery rate”

and

* “Pressure test in the fuel supply line’.

Follow the following procedure if concern reproducible or static:

* — Install the VAS 6550 pressure gauge on the low-pressure side just before the high-pressure fuel pump, so that
the in-line fuel pressure on the low-pressure side can be monitored while the engine is running. Please select
the self-diagnosis function in ODIS-S and set up a graph of measured high-pressure measured values (Actual
VS. Specified), so that the in-line fuel pressure on the high-pressure side can be monitored while the engine is
running.

* While the engine is running, monitor the in-line fuel pressures on the high and low side. If the pressure on the
low side does not drop below 3 bar and the pressure on the high side does not exceed 20 bar, the high-
pressure fuel pump should be replaced.

Follow the following procedure for repeat repairs in cases where the concern is not reproducible:

* Check the expanded ambient conditions for DTCs P014800 and P008700. If the fuel rail pressure (i.e. on the
high-pressure side) is approximately 10 bar, please proceed with replacing with replacing the High-pressure
fuel pump before replacing any other parts connected to the fuel system.

The example below can be used as a reference, the actual fuel pressure at the rail is 880 kPa (8.8bar) highlight in
the blue box. The Specified value is 243.5 bar highlighted in yellow. In this case the high-pressure fuel pump would
need to be replaced.
DTC memory entry
Number:

Error type 2:
Symptom:

Status:

[ - |Standard ambient conditions:
Date:
Time:
Mileage (DTC):
Priority:
Frequency counter:
Elimination counter / driving cycle:

[-] Expanded ambient conditions:
Engine speed
Normed load value
Vehicle speed
Coolant temperature
Intake air temperature
Ambient air pressure
Voltage terminal 30

Dynamic environmental data

P008700: Fuel Rail/System Pressure - Too Low

active/static

15059
11101101
6/10/25
9:42:42 AM
34128
2
4
40
1926.75 rpm
99.60784498 %
43 km/h
74 *C
24 °C
980 mbar
12.968 V

20 96 28 11 DB 00 58 29 3B 09 83 14 1C
F7 A8 20 70 03 13 3F FC 38 04 0C 79 20

28 13 88
Unlearning counter according OBD
Param_OBDAgingCount 40
[FUR ASAE
Param_FUPHSAE 880.0 kPa
Fuel high-pressure, specified value
Param_Press16Usign10 243.5 bar
FAC_LAM_LIM[1]
Param_FACLAMLIM1 -3.2592773 %

Rail pressure regulation, status
Param_FuelPressRegulStatuBs
FTL_SAE

Control operation

Param_FTLSAE 98.82353 %
Accelerator pedal position
Param_AccelPedalPosit 31.93 %
Activation of fuel pump electronics
Param_Perce16Usign100 50.0 %
Warranty
Claim Type: * If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Service Number: 2463
Damage Code: 0010
Labor Operations: Remove and install high-pressure pump 2463 19XX See SRT with
associated operations
Remove and install 2 high-pressure pumps 2463 20XX See SRT with
associated operations
Check fuel pump 2066 0199 50 TU
Remove and install cover 1083 1900 See SRT with

associated operations

Claim Comment:

Remove and install air filter housing (gasoline 2425 19XX See SRT with
engines) associated operations
GFF/ Guided Functions 0150 0060 Time stated on the

diagnostic protocol

As per TSB 2079461/3

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.

Additional Information

All part and service references provided in this TSB (2079461) are subject to change and/or removal. Always check
with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair

Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

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