2025-2026 Audi A5/Q5 Coolant Pump V188 Blocked P2BC100 TSB

The 2025-2026 Audi A5 and Q5 models may experience a specific cooling system issue related to the additional coolant pump V188. Owners might notice a check engine light illuminating on the dashboard, accompanied by a critical message in the instrument cluster: "Drive system: fault. Limited performance. Please contact workshop." This condition is often linked to Diagnostic Trouble Code (DTC) P2BC100, which specifically points to the "Coolant pump for charge air cooler, blocked." This technical service bulletin, identified as TSB 2080825/2, provides guidance for diagnosing and resolving this particular problem.

Symptoms You Might Experience

Owners of affected 2025-2026 Audi A5 and Q5 vehicles will typically observe clear warning signs. The primary indicators include the illumination of the check engine light. More critically, the instrument cluster will display the verbatim message: "Drive system: fault. Limited performance. Please contact workshop." This message suggests that the vehicle's performance may be limited due to a detected fault within the drive system, prompting the driver to seek professional assistance.

Fault Codes and Diagnosis

When these symptoms appear, a diagnostic scan will likely reveal DTC P2BC100. This code specifically identifies the "Coolant pump for charge air cooler, blocked" within the Engine Control Module (-J623-, address word 0001). The additional coolant pump V188 plays a crucial role in managing the temperature of the charge air cooler, which is vital for engine performance and efficiency. A blockage in this pump can lead to the "Audi A5/Q5 coolant pump P2BC100" condition, triggering the warnings.

Audi's technical background for TSB 2080825/2 indicates that this issue primarily arises after extended periods where the vehicle remains stationary, specifically for more than two months. During such prolonged inactivity, the additional coolant pump V188 may sometimes become blocked, though this is considered a rare occurrence.

Important Warnings for Owners

It is crucial for owners to understand the specific conditions under which this TSB applies. This Technical Service Bulletin (TSB) 2080825/2 is only relevant if your vehicle has previously remained stationary for an extended period, exceeding two months. Furthermore, the diagnostic process outlined in the TSB includes a key instruction: if the additional coolant pump V188 is found to be running and the fault is logged as intermittent in the event memory after diagnostic testing, it is not necessary to replace the pump. In such cases, the fault entry should simply be deleted. The pump should only be replaced if it is confirmed to be malfunctioning.

Repair Procedure Summary

For the "Audi A5/Q5 coolant pump P2BC100" issue, technicians will follow a specific diagnostic and repair procedure. First, an output diagnostic test must be performed to assess the pump's status. As part of this test, the technician will attempt to activate the pump. During this activation, they will listen for an audible running noise. To facilitate hearing the pump, it may be necessary to temporarily loosen the front left wheel housing liner.

If the pump is heard running and the fault code P2BC100 is only recorded as an intermittent entry in the vehicle's event memory, the technician will clear the fault code. In this scenario, replacement of the additional coolant pump V188 is not required, saving owners from unnecessary part costs. However, if the pump is confirmed to be malfunctioning and not operating correctly, then replacement is the necessary course of action. This targeted approach ensures that parts are only replaced when genuinely faulty.

Warranty Information

For vehicles still under warranty, claims related to this issue must adhere to the Audi Warranty Policies and Procedures Manual. The Service Number associated with this repair is 1947, and the Damage Code is 0040. The claim comment will refer to "As per TSB 2080825/2." If your vehicle is outside of its warranty period, this Technical Service Bulletin is informational only, meaning that the cost of diagnosis and repair would typically be the owner's responsibility.

What Owners Should Do

If your 2025-2026 Audi A5 or Q5 displays the check engine light and the "Drive system: fault. Limited performance. Please contact workshop" message, especially if the vehicle has been stationary for an extended period, it is recommended to contact an authorized Audi service center. Inform them about the symptoms and mention the potential relevance of Audi TSB 2080825/2 and DTC P2BC100. The technicians will perform the necessary diagnostic steps to determine if the additional coolant pump V188 is indeed blocked or malfunctioning and proceed with the appropriate repair as outlined in the bulletin.

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Source: NHTSA ID: 11031031