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Technical Service Bulletin
Topic 27 Valeo 48V starter generator (BSG) DTC POA1A00 P19F800 POA1E00 U014600 U300100
PI P10F300 P056200 P056100 P065200 P069800
United States 444 Volkswagen of America, Inc. (6444)
Transaction
[Status | Released for publishing
Release date | Jul 31, 2025
Diagnostic trouble codes
Diagnostic address | Diagnostic trouble code Fault Storage
symptom state
O0CC - Starter P056200: System Voltage Low Voltage | Intermittent
generator
OOCC - Starter . . . 5 :
P19F800: 48-volt vehicle electrical system not available | Intermittent
OOCC - Starter . "BY Ciroui i
P065200: Sensor Reference Voltage "B" Circuit Low | Intermittent
90CC - Starter POA1E00: Starter/Generator Control Module | Intermittent
generator
90CC - Starter U300100: Control Module Improper Shutdown Performance | | Intermittent
generator
O0CC - Starter P10F300: Starter generator Release status implausible | | Intermittent
generator
00CC - Starter POA1A00: Generator Control Module | | Intermittent
generator
OOCC - Starter . .
P056100: System Voltage Unstable | Intermittent
0001 - Engine U046900: Invalid Data Received From Starter / Generator static
electronics Control Module
90CC - Starter POA1E00: Starter/Generator Control Module static |
generator
OOCC - Starter U014600: Lost Communication With Serial Data Gateway Intermittent
generator Module "A’
O0CC - Starter P19F800: 48-volt vehicle electrical system not available tate |
generator
O0CC - Starter P069800: Sensor Reference Voltage "C" Circuit Low | | Intermittent
generator
New customer code

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Technical Service Bulletin Transaction No.: 2076994/4

27 Valeo 48V starter generator (BSG) DTC POA1A00 P19F800 POA1E00 U014600 .

U300100 P10F300 P056200 P056100 P065200 PO69800 Release date: Jul 31, 2025

Condition

REVISION HISTORY

revision [pate purpose

ee ee Revised Service (Updated fault table)

3 05/07/2025 Revised header (Added fault codes / Customer Codes / and workshop codes)
Revised Condition (Added customer concerns)
Revised Service (Added fault table)
Revised Warranty (Added replacement part note)

2 03/06/2025 Revised header (Added additional engine codes.)
Revised Service (Updated wording)

Customer states:

+ The engine warning lamp (MIL) is on (Figure 1).

Pee = ONT ae

5 6c}
/ 40

Figure 1. MIL is illuminated.

Workshop findings:

The following DTCs are stored paired in their respective modules:

Engine Electronics, J623 (address word 0001):

+ POA1A00: Control module for alternator — Symptom 45888.

and/or

+ U046900: Alternator control module, implausible signal

AND

Starter Generator, C29 (address word 00CC):

+ P19F800: 48-volt vehicle electrical system not available - Symptom 38806.

+ P0A1A00: Generator control module — Symptom 45888.

(or higher)
4M0.903.028 4M0.903.028 0606 0608 CCA005
The software for the starter-alternator control unit must be updated on this vehicle. Please observe the
information and instructions under “Additional Information” regarding this.
Warranty
There is no reason to replace parts. Unjustified work/replacement parts will be charged back. Invoicing under
warranty is not permitted.
Claim Type: + If the vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Damage Code: 0039
Labor Operations: Software Update 0151 0010 See SRT with
associated operations
Software Update 0151 0060 Time stated on the
diagnostic protocol
Claim Comment: As per TSB 2076994/4
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
The software must be updated on a control unit in this vehicle, or the software must be updated on several control
units in this vehicle to ensure they function correctly in conjunction with the other control units in the vehicle. Please
inform the customer about the software update in question and ask whether they or other third parties have modified
the software (e.g. tuning or retrofitting involving modifications to the vehicle’s software). Please refer the customer to
the Warranty and Maintenance booklet to learn more about how chip tuning can impact warranty coverage. Please
inform the customer that this software update may neutralize previous modifications to the vehicle’s software
performed either by the customer or other third parties.
If the customer declines the software update, please inform them that this could lead to issues or restrictions with
the use of the vehicle or individual components.
Make a note to this effect on the order before it is signed by the customer. Include this information in the customer
file.
All part and service references provided in this TSB (2076994) 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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