2025-2026 Audi A5/Q5 P2D8F00 Engine Oil Pressure Sensor TSB

Owners of 2025-2026 Audi A5, Q5, and Q5 Sportback vehicles equipped with the EA888evo5 2.0 TFSI engine may encounter a "Warning display in instrument cluster" related to engine oil pressure. This condition is specifically addressed by Audi Technical Service Bulletin (TSB) 2079097/2, which details the diagnostic and resolution steps for the diagnostic trouble code (DTC) P2D8F00.

This TSB, identified as 2079097/2, provides critical information for technicians to accurately diagnose and resolve the underlying cause of the warning without unnecessary parts replacement. The bulletin was initially published on August 29, 2025, and revised on December 16, 2025, to include updated model years, condition details, and service information.

Symptoms

The primary symptom reported by owners is a clear "Warning display in instrument cluster." This visual alert indicates a potential issue with the engine's oil pressure system, prompting concern and requiring attention. Drivers should not ignore such warnings, as they can signify critical engine health issues.

Fault Codes / DTCs

When a vehicle exhibits the symptom described, technicians will typically find a specific diagnostic trouble code (DTC) stored in the -J623- control unit (address word 0001). This code points directly to the nature of the fault.

Code	Symptom Code	Description	Module
P2D8F00	17004	Engine Oil Pressure Sensor/Switch "C" Circuit Low	J623

This P2D8F00 code specifically indicates an "Engine Oil Pressure Sensor/Switch 'C' Circuit Low" condition, guiding the diagnostic process.

Diagnosis / Trigger Conditions

The technical background for this issue, leading to the Audi A5 P2D8F00 engine oil pressure warning, suggests that a voltage spike can occur. This spike may be measured in certain cases if a powerful charger is connected in the workshop to boost the vehicle's voltage, and this charger is activated while the vehicle is switched on (terminal 15). This specific scenario can lead to the erroneous logging of the P2D8F00 fault code.

Repair Procedure Summary

The repair procedure outlined in TSB 2079097/2 is straightforward and focuses on proper diagnostic practices rather than immediate component replacement. For vehicles exhibiting the Audi A5 P2D8F00 engine oil pressure warning, technicians should follow these steps:

1. Connect Charger: Before switching on the vehicle (terminal 15), ensure a charger is properly connected. This helps stabilize the electrical system during diagnostic work.
2. Erase Event Memory: The next step involves erasing the event memory in the diagnostic log. This clears any stored fault codes, including the P2D8F00 code, allowing for a fresh assessment.
3. Reassess Complaint: After clearing the memory, the technician should reassess the complaint to see if the warning reappears. This helps determine if the voltage spike was a transient issue or if a more persistent problem exists.
4. Guided Fault Finding: If the event memory is logged again, indicating the fault has returned, technicians are instructed to work through the event memory according to the Guided Fault Finding process. This ensures a thorough and systematic approach to identify any underlying issues.

Important Warnings

This Technical Service Bulletin includes a crucial piece of information for both owners and technicians: "It is not necessary to replace parts." This means that for the P2D8F00 fault code, the initial appearance of the warning does not automatically warrant the replacement of the engine oil pressure sensor or any other components. The issue is often a transient electrical anomaly related to charging procedures.

Warranty Information

Warranty claims related to this TSB must adhere to the Audi Warranty Policies and Procedures Manual. The service number for this procedure is 1705, with a damage code of 0010. The labor operations involved include "GFF— Checking and clearing fault codes included in existing labor operations" (0150 0010) and general "GFF" (0150 0060), with time stated on the diagnostic protocol. Claims should be submitted "As per TSB 2079097/2."

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Source: NHTSA ID: 11027443, TSB 2079097/2