2021-2022 Audi e-tron A/C Not Cooling DTCs P053000 P251500

Audi has released Technical Service Bulletin (TSB) 2068460/7, issued on September 12, 2025, to address a common concern among owners of certain 2021-2022 Audi e-tron vehicles: the air conditioning system not providing adequate or any cooling output. This TSB specifically targets instances where diagnostic trouble codes (DTCs) P053000 and P251500 are stored in the vehicle's thermal management system.

The TSB, identified by transaction number 2068460/7, provides detailed information for diagnosing and resolving the underlying hardware issue with the A/C refrigerant pressure sensors. If you are experiencing an Audi e-tron A/C not cooling problem, this bulletin outlines the necessary steps for repair.

Symptoms of A/C Malfunction

Owners may notice various issues related to the climate control system. These symptoms often point to the underlying problem addressed by TSB 2068460/7:

• The air conditioner is not working at all, or the cooling output is strongly reduced.
• Climate control cooling functions related to the condenser are damaged.
• Parking heating or cooling cannot be switched on or activated.
• The A/C system switches on or off by itself (ECO, AC modes).
• The MMI A/C status display shows incorrect readings.
• Automatic climate control mode (AUTO) switches off by itself or cannot be activated.
• The climate control unit has no cooling output function.
• The display control head for the A/C system or climate control operating unit temperature button is damaged.
• Infotainment controls related to climate functions are not working.
• Engine coolant temperature regulation is irregular.
• Increased electrical leakage current or current draw related to climate control system adjustment memory.
• Manual climate control mode has no function.
• Ventilation with fresh air blower levels 1 or 2 have no function, or indicate too little automotive fluids.
• Parking heating/cooling auxiliary heater cannot be switched on or activated.
• Automatic climate control mode (AUTO) misfires.

Fault Codes / DTCs

When a workshop diagnoses the Audi e-tron A/C not cooling issue, they may find specific diagnostic trouble codes (DTCs) stored in the thermal management system (diagnostic address 00C5, Audi Q4 diagnostic address 0008). These codes indicate a problem with the A/C refrigerant pressure sensors.

Diagnostic Trouble Code	Description	Storage State
P251500	A/C Refrigerant Pressure Sensor "B" Circuit	Static, Intermittent
P053000	A/C Refrigerant Pressure Sensor "A" Circuit	Static, Intermittent

Diagnosis and Technical Background

The workshop will reproduce the fault and confirm the presence of either DTC P053000 or P251500. The technical background for these issues is identified as a hardware problem with the pressure sensor itself.

Important Sensor Information and Warnings

When replacing pressure sensors, it is crucial to verify if a sensor has been previously replaced. This can be determined by markings on the sensor, such as a green dot on the plastic part (not always present), laser marking on the aluminum part, a production date greater than week 31 of 2021 (>3121), or if the component already has an index E marking.

Critical Warning for Sensor Replacement: If an index E sensor can no longer be ordered from the replacement parts warehouse and index J sensors are available, note that index E and index J sensors are not compatible. If an index J version of a sensor is installed, all other pressure sensors in the affected vehicle must also be replaced with index J sensors. If index E sensors are still available in the replacement parts warehouse, they should be ordered.

Repair Procedure Summary

The primary repair for the Audi e-tron A/C not cooling issue, as outlined in TSB 2068460/7, involves replacing the faulty pressure sensors. The service procedure requires replacing all pressure sensors in the air conditioning circuit. This typically includes draining and refilling the refrigerant.

Warranty Information

For vehicles outside of warranty, this Technical Service Bulletin is for informational purposes only. For vehicles under warranty, claims should be submitted according to the Audi Warranty Policies and Procedures Manual. The Service Number associated with this repair is 8757, and the Damage Code is 0040. Specific labor operations are provided for different Audi models:

• A6/A7: Pressure switches (both) remove and reinstall (8709 2050), Refrigerant drain and fill (8703 1700).
• Q7/Q8: Pressure switches (both) remove and reinstall (8757 2093), Refrigerant drain and fill (8703 1700).
• A8: Pressure switch (G395) remove and reinstall (8757 1950), Pressure switch (G826) remove and reinstall (8764 1950), Refrigerant drain and fill (8703 1700).
• e-tron GT: Pressure switches (all 3) remove and reinstall (8709 2050), Refrigerant drain and fill (8703 1700).
• Q5: Pressure switches (both) remove and reinstall (8709 2050), Refrigerant drain and fill (8703 1700).
• e-tron: Pressure switch (G395) remove and reinstall (8757 1950), Pressure switch (G826) remove and reinstall (8764 1950), or Pressure switches (both) remove and reinstall (8709 2051).
• Q4: Pressure switch remove and reinstall (8709 19xx).

Additional operations include checking pressure switch (8709 0199), GFF (0150 0060), and charging battery (2706 8950).

Revision History

This TSB has undergone several revisions to ensure accuracy and completeness:

• Revision 7 (Date not specified): Updated text for the title, header (added PR criteria), condition, technical background, production solution, service, and warranty (corrected labor operations).
• Revision 6 (May 10, 2024): Revised the Service section to include a statement regarding sensor interchangeability and corrected labor operations in the Warranty section.
• Revision 5 (October 2, 2023): Revised the Technical Background and Service sections to correct component designations, and updated the Warranty section with corrected SRTs.

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Source: NHTSA ID: 11023751