2022-2024 Audi Washer Solvent Level Warning TSB

Owners of 2022-2024 Audi vehicles may encounter a persistent Audi washer solvent warning in their driver information system (DIS), even when the windshield washer fluid reservoir is completely full. This technical service bulletin (TSB) from Audi, identified as 2038151/12, provides a detailed diagnostic and repair procedure for this specific condition, aiming to resolve the false warning without unnecessary part replacement.

Symptoms

The primary symptom is a false "washer solvent level warning is on" message displayed in the driver information system (DIS). This warning appears despite the washer solvent level being correct and the reservoir being full.

Technical Background

The sensitivity of the washer solvent level sensor, designated as G33, can be significantly impacted by the type, concentration, and presence of additives in the washer solvent currently in the tank. The sensor's operation relies on the precise composition of the solvent to accurately determine the fluid level. Incorrect concentration or the presence of certain additives can contaminate the sensor, reducing its sensitivity and leading to an inaccurate Audi washer solvent warning.

Important Warning for Owners

Audi explicitly states: "It is not necessary to replace the windshield washer solvent level sensor when the cause of failure is contaminated sensor probes or incorrect washer solvent solution. Warranty claims for replacement of washer solvent level sensors that are found to not be faulty will not be reimbursed." This highlights the importance of proper diagnosis and cleaning before considering sensor replacement.

Revision History

This Technical Service Bulletin (TSB) 2038151/12, issued on July 14, 2022, supersedes an earlier bulletin, Group 92 number 19-24, dated December 20, 2019. The bulletin has undergone several revisions to expand its applicability and refine its procedures:

• Revision 12 (July 14, 2022): Revised the header to include Model Years 2022-2024 and updated warranty information to include Q4 e-tron and Audi e-tron GT models.
• Revision 11 (December 20, 2019): Updated the quantity of required parts and tools.
• Revision 10 (November 12, 2019): Revised the header to include Model Year 2021, updated warranty information for Q3 and Audi e-tron quattro, and revised service instructions to include an alternative cleaning solution and suggested washer solvents.
• Revision 9 (February 7, 2019): Updated labor operations and added the A7 model to the warranty section.

Repair Procedure Summary

The repair procedure focuses on cleaning the washer solvent level sensor and ensuring the correct type and concentration of fluid is used. The steps vary slightly depending on whether the sensor is easily removable:

1. Empty Reservoir and Sensor Removal (Most Models): For most Audi vehicles, except the A3 Sedan, A3 Cabriolet, and Q4 e-tron, the first step involves emptying the washer fluid reservoir and removing the level sensor. The sensor probes are then cleaned using all-purpose cleaner D 009 401 04 or, as an alternative, isopropyl alcohol. The sensor is then reinstalled.
2. Sensor Cleaning (A3 Sedan, A3 Cabriolet, Q4 e-tron): For models where the washer solvent level sensor is not removable, technicians must remove the entire reservoir, detach the filler neck, and then gain access to the sensor probes through the tank opening. A specialized cleaning brush, such as a hummingbird feeder cleaning brush (as shown in Figure 3 of the TSB), with a rigid stem approximately 10 inches long, is saturated with D 009 401 04 or isopropyl alcohol and used to thoroughly clean the sensor probes.
3. Refilling with Correct Solvent: After cleaning, the reservoir must be refilled with the correct type and concentration of washer solvent. Audi recommends using windshield washer fluids from the Audi Top Service Supplies and Touch Up Paint eStore with a 35% pre-mix, suitable for temperatures down to -22°F (-30°C). For colder conditions, Windshield Washer Fluid Concentrate ZAW 096 311 B can be mixed according to specific ratios to achieve freeze protection down to -25°F (-32°C). This fluid also helps prevent washer jet contamination. For states with VOC restrictions, an alternative Audi Windshield Washer Fluid – 35% pre-mix (55-gallon drum) is available.
4. Checking Concentration: The concentration and freeze point of the refilled solvent can be checked using a T10007A refractometer. A drop of fluid is placed on the refractometer's glass, and the scale is used to adjust the solvent concentration to suit current weather conditions.

Required Tools and Parts

To perform this service, specific materials are required:

• All-purpose cleaner: D 009 401 04 (or isopropyl alcohol)
• Windshield Washer Fluid Concentrate: ZAW 096 311 B (item number 128429)
• Washer solvent alternative for states with VOC restrictions: Item # 121133 / WWFDRUM (55-gallon drum)
• Refractometer: T10007A
• Fasteners, Bolts, Nuts, and Screws: As needed per the Repair Manual (refer to ETKA/ELSA).

Warranty Information

Warranty claims for this Audi washer solvent warning repair are processed under specific guidelines:

• Claim Type: 110 (up to 48 Months/50,000 Miles) or G10 for CPO (Certified Pre-Owned) Covered Vehicles, requiring owner verification.
• Out of Warranty: If the vehicle is outside any applicable warranty, this Technical Service Bulletin is informational only.
• Service Number: 9258
• Damage Code: 0040
• Labor Operations: Various labor operations are specified depending on the model year and vehicle type. These operations include tasks such as "Lower Windshield washer reservoir remove + reinstall," "Cover (plenum) remove + reinstall," "Front wheel housing liner remove + reinstall," "Fluid level sensor remove + reinstall," and "Clean fluid level sensor and adjust solvent concentration." Diagnostic time for Q4 e-tron models is 0150 0000, and road tests before and after service are also accounted for. All warranty claims must adhere to the Audi Warranty Policies and Procedures Manual.

NHTSA ID: 10216047