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Technical Service Bulletin
Topic 19 Engine: Radiator blind - fault. Maximum speed limited to 10 mph A3 DTCs POSAFOO,
PI P05B200, POSA000, PO5A300
United States 444 Volkswagen of America, Inc. (6444)
Transaction
[Status | Released for publishing
Release date |Aug 1, 2025
Diagnostic trouble codes
Diagnostic address | Diagnostic trouble code Fault Storage
symptom state
0001 - Engine P05A300: Active Grille Air Shutter "A" Control Circuit
7 Intermittent
electronics Range/Performance
0001 - Engine POSAFOO: Active Grille Air Shutter "B" Stuck On static
electronics .
0001 - Engine » Rati . nae
POS5A000: Active Grille Air Shutter "A" Stuck On | Intermittent
0001 - Engine P05A300: Active Grille Air Shutter "A" Control Circuit
7 static
electronics Range/Performance
0001 - Engine PO5A000: Active Grille Air Shutter "A" Stuck On static
electronics
0001 - Engine P05B200: Active Grille Air Shutter "B" Control Circuit Intermittent
electronics Range/Performance
0001 - Engine POSAFO0: Active Grille Air Shutter "B" Stuck On | | Intermittent
electronics
0001 - Engine P05B200: Active Grille Air Shutter "B" Control Circuit static
electronics Range/Performance
New customer code
Object of complaint Complaint type [Position _|
information, navigation, communication, entertainment -> driver
information system (DIS, MFI, MMI) -> text display -> message: _| functionality -> activates
engine fault
engine -> engine operation -> engine running functionality -> irregular |
engine -> cooling, lubrication -> coolant fan control functionality ~> operation |
sequence incorrect
information, navigation, communication, entertainment ->
malfunction display symbols -> emissions control system functionality -> activates
malfunction display
. - , 5 a functionality -> operation
engine -> engine operation -> engine output characteristic [funetonaty = operation | |

Object of complaint Complaint type [Position _|
information, navigation, communication, entertainment -> warning
display symbols -> low coolant\coolant temperature warning functionality -> activates
display
engine -> cooling system -> engine radiator component, automotive fluids -> |> no
9 9 sy g damaged instruction <
information, navigation, communication, entertainment ->
malfunction display symbols -> engine management malfunction | functionality -> activates
display (diesel)
information, navigation, communication, entertainment -> warning functionality -> activates
display symbols -> active warning warning display
vehicle service -> vehicle diagnosis -> Guided Fault Finding control modules, services -> with
(GFF) fault stored in the DTC memory
New workshop code
Object of complaint Complaint type [Position]
engine -> cooling system -> radiator shutter adjustment functionality -> operation sequence
motor incorrect
engine -> cooling system -> radiator shutter component, automotive fluids -> jammed [|
Vehicle data
A3
Sales types
Documents
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Technical Service Bulletin Transaction No.: 2078829/1
19 Engine: Radiator blind - fault. Maximum speed limited to 10 mph A3 DTCs .
PO5AFO0, POSB200, PO5A000, POSA300 Release date: Aug 1, 2025
Condition
Customer states:

+ Message in instrument cluster: “Radiator blind: fault. Maximum speed limited to 10 mph. Please contact

workshop.”

Workshop findings:
One or more of the following DTCs and symptom codes are logged in the engine contro! module -J623-, (address
word 0001):

+ | DTC PO5AF00: active radiator blind 2 sticks open - symptom 28397.

+ DTC P05B200: active radiator blind 2 lost communication - symptom 28405.

+ DTC P05A000: active radiator blind 1 sticks open - symptom 28396.

+ DTC P05A300: active radiator blind 1 lost communication - symptom 28408.
Technical Background

Engine control unit issue.

Production Solution

Not appliacable.
Service
This TSB closes PSS 2073088: 19 PSS Engine: Radiator blind - fault. Maximum speed limit to 10 mph A3 DTC's
POSAFOO, P05B200, POSA000, PO5A300.

Update the engine control unit software.
‘Mode: —_| Software part number: Target data version: SVM code:
8Y0 907 115E 0002
A3, 2.0 Itr. TFSI 01A332
8Y0 907 115A 0004
+ In rare cases the following message is shown to the customer in the instrument cluster: “Radiator blind: fault.
Maximum speed limited to 10 mph. Please contact workshop.”
Note:
- The maximum speed is not limited to 10 mph, as shown in the attached image.

— The message should specify 100 mph, rather than 10 mph.
Please observe TSB 2074984: 90 Warning in cluster “Radiator blind - fault. Maximum speed limit to 10 mph" DTC's
POS5AFO00, P05B200, PO5A000, PO5A300 regarding the 100 / 10 mph display.
+ The complaint can usually be remedied by switching the ignition off and on again.
+ If no fault with the components can be found using Guided Fault Finding, the event memory entry can be
deleted.
Warranty
Claim Type: + Ifthe vehicle is outside of any warranty, this Technical Service Bulletin is
informational only.
Damage Code: 0016
Labor Operations: GFF / Guided Functions 01500010 |See SRT with
associated operations
GFF / Guided Functions 0150 0060 | Time stated on the
diagnostic protocol
Claim Comment: As per TSB 2078829/1
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 (2078829) 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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