2019-2026 Audi Parking Aid Malfunction TSB 2058769/8

Symptoms of a Parking Aid Malfunction

Owners of affected 2019-2026 Audi models may experience an intermittent or static warning message related to the parking aid or maneuver assistant system. This Audi e-tron parking aid malfunction can manifest differently depending on the software level of the Driver assist system module J1121 (address word 00A5).

Common warning messages you might see in your instrument cluster include:

• For software versions SW 0257/0259: "Front/rear parking aid fault. Obstacles cannot be detected."
• For software versions SW 0290 or higher: "Front/rear parking aid: Sensor view restricted due to surroundings: Obstacles not detectable."
• Another potential message is: "Maneuver assist fault: Please contact workshop."

Fault Codes (DTCs)

When the parking aid system malfunctions, one of the following Diagnostic Trouble Codes (DTCs) may be stored in the driver assist system control module J1121:

• DTC B107BF0: Rear parking aid sender, malfunction because of environment influences. This DTC may be accompanied by symptom codes 233479 or 233473.
• DTC B10FCF0: Front parking aid sender, malfunction because of environment influences. This DTC may be accompanied by symptom codes 233523 or 233472.

These codes indicate that the system is detecting issues likely caused by external environmental factors.

Diagnosis and Trigger Conditions

The parking aid system uses 6th generation ultrasound sensors. These sensors can detect problems due to external influences such as dirt, ice, or other external ultrasound signals. To prevent false warnings, the system temporarily becomes unavailable when such conditions are detected, and a message is displayed to the driver.

For example, symptom codes 233479/233523 indicate "Temporary partial availability of the system because of environmental influences (e.g., external ultrasound signal, street sweeper, construction equipment, etc.)". Similarly, symptom codes 233473/233472 point to "Temporary partial availability of the system because of environmental influences (e.g., dirt/ice)".

Important Warnings for Owners

Audi Technical Service Bulletin 91 24 79 2058769/8 highlights crucial information regarding this issue:

• Do not replace the J1121 control unit unnecessarily: "In this case, replacement of the driver assistance systems J1121 without clear findings is not effective. Part replacement of the J1121 does not solve this issue. Claims for replaced parts will be subject to review." This means that if environmental factors are the cause, replacing the control unit will not resolve the problem and may lead to unnecessary costs.
• Warranty Coverage: "This TSB is informational only and not applicable to any Audi Warranty." Owners should be aware that repairs related to this TSB may not be covered under standard warranty.

Repair Procedure Summary

Technicians are advised to perform several checks on the ultrasound sensors, depending on the stored DTC. The primary goal is to identify if the issue is due to environmental factors or a faulty component.

1. Visual Inspection:
   • Check for dirt, ice, foreign objects, stickers, or an improperly fitted license plate on the sensors.
   • Inspect the bumper, air intake grille, and underbody for damage from impacts during parking.
   • Look for mechanical damage like stone chips or scratches.
   • Verify the proper fit of the sensors, bumpers, and surrounding trim.
2. Diagnostic Check:
   • Check the measured value block "Vibration time of parking aid sender" in the J1121 control module. This helps identify cyclic or dynamic changes when approaching an obstacle.

Scenario 1: Sporadic Occurrence If the parking aid malfunction occurs sporadically, it is likely caused by environmental influences. In this case, no further measures are necessary beyond the initial checks and cleaning. Replacing the J1121 driver assistance system control unit is not effective if the issue is environmental.

Scenario 2: Reproducible or Static Malfunction If the concern is reproducible or static, it suggests a potential fault with one of the ultrasound sensors, their mounts, or associated circuits. For this scenario, technicians should proceed with standard diagnosis to pinpoint the faulty component. A significantly increased frequency counter within standard ambient conditions for the respective fault code can indicate a malfunction.

Owner Action

If you are experiencing an Audi e-tron parking aid malfunction or seeing related warning messages in your 2019-2026 Audi, it is recommended to first check your vehicle's sensors for any obstructions like dirt, ice, or foreign objects. If the issue persists, contact your authorized Audi service center. Be aware that this Technical Service Bulletin 91 24 79 2058769/8 is informational, and repairs may not be covered under warranty if the cause is environmental.

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Source: NHTSA ID: 11011277