2020-2022 Audi e-tron AC Sensor Failure Service Action

Audi has launched Service Action 87H9 to address a potential issue with the air conditioning system in certain 2020-2022 Audi e-tron vehicles. This action targets the pressure and temperature sensors, which may fail and cause the air conditioning to stop functioning. This service action is part of Audi's commitment to customer satisfaction and ensures the continued performance of your vehicle's climate control system.

Symptoms

Owners of affected vehicles may experience their air conditioning system will no longer function. This indicates a potential failure of the Audi e-tron pressure temperature sensors within the AC system, preventing proper cooling or heating.

Diagnosis and Trigger Conditions

To determine if your vehicle is affected and requires this service, technicians will follow a specific diagnostic procedure:

1. VIN Qualification Check: The first step is to check the "Campaigns/Actions" screen in the Elsa system on the day of repair to verify that your vehicle's VIN qualifies for this action. Elsa is the only valid source for campaign inquiry and verification.
2. Campaign Status Confirmation: The campaign status must show "open." If Elsa indicates other open actions, the customer will be informed so that all necessary work can be completed during the same workshop visit.
3. Sensor Inspection: Technicians will locate the G395 and G826 pressure/temperature sensors in the under-hood compartment. They will visually inspect the connector housing of both sensors for a green dot. If a green dot is present on both sensors, no replacement is required.
4. Production Date Verification: If a green dot is absent on one or both sensors, the technician will check the sensor's production date. Sensors produced between calendar week 23 of 2020 and calendar week 30 of 2021 (inclusive) require replacement. Sensors outside this range, or those with a green dot, do not need to be replaced. A mirror may be used to inspect sensors in hard-to-reach positions.

Repair Procedure Summary

If the inspection confirms that one or both of the Audi e-tron pressure temperature sensors need replacement, the repair involves several detailed steps to ensure proper function and safety:

Section A – Check for Previous Repair

Technicians will enter the VIN into Elsa and navigate to the "Campaign/Action" screen. They will confirm the campaign status is "open." If a "Campaign Completion Stamp" is already present, no further work is required. If multiple software update campaigns are open, they must be performed in order of their start date, with the oldest performed first. All Safety Recalls must be completed prior to this campaign.

Section B – Sensor Inspection

This section details the initial inspection process. The front luggage compartment liner (component 1 in the diagram on page 10 of the TSB) is removed according to the ELSA repair manual path: "Repair manual > Body > Body Interior > Interior Trim > Luggage Compartment Trim Panels > Front Luggage Compartment Liner, Removing and Installing." The G395 (component 1 in the diagram on page 10) and G826 (component 2 in the diagram on page 10) pressure/temperature sensors are then located. Technicians will label the sensors and their connectors, ensure the ignition is turned off, and disconnect the sensors. A critical caution is noted: "The connectors for the G395 and G826 can be swapped! Ensure that the connectors are reinstalled in their correct locations if removed."

Section C – Sensor Replacement

If replacement is necessary, technicians must adhere to strict safety protocols due to the high-pressure refrigerant. This includes wearing safety gloves and protective eyewear. The refrigerant must be evacuated or drained, and the refrigerant circuit opened immediately. If more than 10 minutes pass after draining without opening the circuit, the refrigerant must be drained again due to pressure buildup. The power-activated valves in the refrigerant circuit must be opened through the ODIS diagnostic system prior to refrigerant recovery.

Specific ELSA repair manual instructions are followed for replacing the G395 sensor ("Repair manual > Heating, Ventilation & Air Conditioning > Heating Ventilation and Air conditioning > 87 Air Conditioning > Refrigerant Circuit > A/C Pressure/Temperature Sensor G395, Removing and Installing") and the G826 sensor ("Repair manual > Heating, Ventilation & Air Conditioning > Heating Ventilation and Air conditioning > 87 Air Conditioning > Refrigerant Circuit > A/C Pressure/Temperature Sensor 2 G826, Removing and Installing"). After sensor replacement, any additional basic settings recommended by the test plan in ODIS are completed.

Vehicle Reassembly

Reassembly is performed in the reverse order of removal. This includes recharging the A/C system with the amount of refrigerant that was recovered. The front luggage compartment liner and the foam insert for tool storage must be replaced with new parts (Part Numbers 4KE-012-113-A and 4KE-863-362-B) after removal.

Section D – Campaign Completion Stamp

Once the campaign work is completed, the technician will stamp the repair order to confirm completion. Stamps are available for ordering through the Compliance Label Ordering Portal.

Required Tools or Parts

To perform this service action, specific parts and specialized tools are necessary:

Parts:

• SENSOR: Part Numbers 4M0-959-603-E (up to 2 required), 4M0959603E
• BIN: Part Numbers 4KE-012-113-A (1 required), 4KE-863-362-B (1 required)
• OIL REFRIG: Part Number G-052-535-1M-DSP (up to 1.2 ml required), G 052535M2
• R1234yf Refrigerant (up to 74g required)
• RIVET: Part Number N 90558401 (up to 4.00 required)

Specialized Tools:

• R1234yf Air Conditioning Service Unit (ROB1234YFX- or VAS581005-)
• Socket - 24mm (T40284- or equivalent)
• Engine Bung Set (VAS6122- or equivalent)
• Diagnostic Tester (VAS6150X/6160X- or equivalent)
• Battery Tester/Charger (capable of minimum 90 Amp continuous supply)
• Safety Gloves
• Safety Goggles

Warranty Information and Claim Entry

This service action is covered under warranty. Dealers will use the following codes for claim entry:

• Service Number: 87H9
• Damage Code: 0099
• Parts Vendor Code: 002
• Claim Type: Sold vehicle: 7 10; Unsold vehicle: 7 90
• Causal Indicator: Mark labor as causal if SENSOR is OK; Mark SENSOR* as causal if a sensor(s) is NOT OK
• Vehicle Wash/Loaner: Do not claim wash/loaner under this action
• Criteria I.D.: GE

Labor Operations and Time Units:

Labor Op	Time Units	Description
8711 01 99	10	Check sensor production dates
7007 19 00	SEE ELSA	Storage compartment remove+reinstall
8709 20 51	SEE ELSA	2 Pressure switch remove+reinstall (if both sensors replaced)
8757 19 50	SEE ELSA	High pressure switch remove+reinstall (Only if G395 sensor replaced)
8764 19 50	SEE ELSA	Low pressure switch remove+reinstall (Only if G826 sensor replaced)
8703 17 00	SEE ELSA	Refrigerant drain+fill
2706 89 50	SEE ELSA	Connect battery charge
0150 00 00	Time stated on diagnostic protocol	GFF/Guided functions

Important Warnings and Owner Information

• High-Voltage System Danger: Working near the high-voltage system carries extreme danger of severe or fatal injuries from electric shock. Technicians must perform visual checks of high-voltage components and wiring, avoid cutting/forming tools, and refrain from welding, brazing, thermal bonding, or hot air in the vicinity of high-voltage components and cables.
• Frostbite Caution: There is a danger of frostbite due to refrigerant coming out under pressure. Safety gloves and protective eyewear must be worn during refrigerant handling.
• Sensor Connector Swap: The connectors for the G395 and G826 sensors can be swapped. It is crucial to ensure they are reinstalled in their correct locations if removed.
• Safety Recalls First: All open Safety Recalls must be completed prior to completing this service action.
• Campaign Expiration: This service action is available free of charge only until September 01, 2028. "If you wish to have this service performed after that date, your dealer's normal costs associated with this repair will apply."
• Dealer Inventory: Audi requires dealers to "ensure that every affected inventory vehicle has this campaign completed before delivery to consumers."
• Owner Notification: "Owner notification will take place in February 2024." Owners will receive letters explaining the issue and next steps.
• Reimbursement: If you have previously paid for repairs relating to the condition described in this letter, you may be eligible for reimbursement. Contact your Audi dealer or Audi Customer Experience for details.

Owner Action

Audi will begin notifying owners in February 2024. If you own a 2020-2022 Audi e-tron and experience issues with your air conditioning system, or simply wish to ensure your Audi e-tron pressure temperature sensors are functioning correctly, you should contact an authorized Audi dealer as soon as possible to schedule an appointment. The inspection and necessary repairs will be performed free of charge until the campaign expiration date of September 01, 2028.