2021 Audi Q5 e High-Voltage Battery Deterioration TSB

Symptoms of High-Voltage Battery Deterioration

Owners of the 2021 Audi Q5 e may notice specific indicators related to high-voltage battery performance. The primary symptoms include the illumination of "The yellow engine warning lamp appears in the instrument cluster." This warning light signals a potential issue with the vehicle's powertrain or hybrid system.

Another common symptom reported is that "The remaining electric range displayed is too low." This indicates a reduction in the vehicle's ability to operate on electric power, suggesting a problem with the high-voltage battery's capacity or efficiency. These symptoms point towards potential Audi Q5 e high-voltage battery deterioration.

Diagnostic Trouble Codes (DTCs)

When diagnosing issues related to Audi Q5 e high-voltage battery deterioration, technicians may find several diagnostic trouble codes (DTCs) logged in the hybrid battery management control unit (diagnostic address 008C). These codes can be stored as either static (active) or intermittent (passive) entries.

Diagnostic Trouble Code	Description	Storage State
P0BBD00	Hybrid Battery Pack Voltage Variation Exceeded Limit	static, intermittent
P0A7F00	Hybrid/EV Battery Pack "A" Deterioration	intermittent, static
P0EDD00	Hybrid/EV Battery Pack "B" Deterioration	intermittent, static
P0EDE00	Hybrid/EV Battery Pack "C" Deterioration	intermittent, static
P0EDF00	Hybrid/EV Battery Pack "D" Deterioration	intermittent, static
P0EE000	Hybrid/EV Battery Pack "E" Deterioration	intermittent, static
P0EE100	Hybrid/EV Battery Pack "F" Deterioration	intermittent, static
P2CCC00	Hybrid/EV Battery Pack "G" Deterioration	intermittent, static
P2CCD00	Hybrid/EV Battery Pack "H" Deterioration	intermittent, static

These DTCs are critical for identifying specific battery module deterioration or voltage imbalances within the high-voltage battery system.

Diagnosis and Technical Assistance

Audi has issued Transaction 2076982/1 as a "Reporting obligation pre repair" bulletin, released on February 20, 2025. This means the manufacturer is actively gathering information on these specific high-voltage battery issues before a final repair procedure is fully developed and released. For vehicles exhibiting symptoms of Audi Q5 e high-voltage battery deterioration and logging the associated DTCs, technicians are instructed to contact the Audi Technical Assistance Center (TAC) before attempting any part replacements.

This step is crucial for accurate diagnosis and to prevent unnecessary repairs. If your 2021 Audi Q5 e is still under the New Vehicle Limited Warranty, the dealer must contact a TAC consultant. They will need to attach the DTCs and a diagnostic log to a TAC Web Ticket for review.

Important Warnings for Owners

Owners should be aware that this Technical Service Bulletin (TSB), Transaction 2076982/1, is currently informational. It serves as a directive for dealers to collect data and consult with Audi's technical experts.

Audi has stated that "No changes to production have been made, as no issue has been identified" in terms of a production solution. Furthermore, this TSB "is informational only and not applicable to any Audi Warranty." This means that while Audi is investigating the issue, any repairs related to this condition may not be covered under standard warranty terms if a specific recall or extended warranty program is not later established.

What Owners Should Do

If you own a 2021 Audi Q5 e and are experiencing a "yellow engine warning lamp" or "remaining electric range displayed is too low," it is advisable to contact your authorized Audi dealer. Inform them of the symptoms and mention the possibility of Audi Q5 e high-voltage battery deterioration.

While this bulletin is for data collection, your dealer will follow the manufacturer's instructions to verify the condition and consult with the Audi Technical Assistance Center. This process helps Audi gather the necessary information to potentially develop a definitive solution for these high-voltage battery issues.

Source: NHTSA ID 11015765