2021-2023 Audi Q3 Boost Pressure Sensor DTCs

Audi has released an on-car analysis list for various models, highlighting several common issues reported by owners and technicians. Among these, a specific concern for the 2022 Audi Q3 involves the Audi Q3 boost pressure sensor, which can trigger the check engine light and specific diagnostic trouble codes.

This communication serves as an internal guide for Audi technicians, outlining initial diagnostic steps and documentation requirements for these issues. Owners of affected 2021-2023 Audi Q3 vehicles experiencing related symptoms should be aware of these potential problems.

Symptoms

Owners of affected Audi Q3 vehicles may notice the following primary symptom related to the boost pressure sensor:

• "Check engine lamp is on"

Fault Codes / DTCs

When the "Check engine lamp is on" symptom appears due to a boost pressure sensor issue, technicians may find one or more of the following Diagnostic Trouble Codes (DTCs) stored in the vehicle's computer:

Code	Description
P010600	Manifold Absolute Pressure/Barometric Pressure Sensor Range/Performance
P023600	Turbocharger/Supercharger Boost Sensor 'A' Circuit Range/Performance
P023700	Turbocharger/Supercharger Boost Sensor 'A' Circuit Low
P023800	Turbocharger/Supercharger Boost Sensor 'A' Circuit High

Diagnosis and Troubleshooting Steps

Audi's communication emphasizes thorough documentation and specific diagnostic procedures to accurately identify the root cause of the Audi Q3 boost pressure sensor issue. Technicians are advised to perform the following steps:

• Wiggle test harness: This procedure involves gently manipulating the wiring harness connected to the boost pressure sensor to check for intermittent electrical connections or loose wires that could cause the fault codes.
• Check pin fitment and pin drag: Inspecting the electrical pins for proper fitment and tension ensures a solid connection. Poor pin fitment or insufficient drag can lead to high resistance or intermittent contact, triggering DTCs.
• Check circuit resistance (if needed): Measuring the electrical resistance of the boost pressure sensor circuit helps identify open circuits, short circuits, or excessive resistance that might be preventing the sensor from functioning correctly.
• Photos of findings: Documenting all diagnostic findings with photographs is crucial for supporting the repair process and for communication with Audi technical support.
• Q3 Boost pressure sensor worksheet: Utilizing a dedicated worksheet ensures a structured and comprehensive diagnostic process, guiding technicians through all necessary checks specific to the Audi Q3 boost pressure sensor.

What Owners Should Do

If your 2021-2023 Audi Q3 displays a "Check engine lamp is on" warning, especially if accompanied by performance issues, it is advisable to have your vehicle inspected by an authorized Audi service center. Mentioning the potential Audi Q3 boost pressure sensor issue and the associated DTCs (P010600, P023600, P023700, P023800) can help technicians quickly narrow down the diagnosis. Ensure any repairs are documented and that your service center follows Audi's recommended diagnostic procedures.

Other Issues Covered by This Communication

This particular Audi manufacturer communication (NHTSA ID 10238198) is a broader analysis list that also addresses several other distinct issues across various Audi models and model years. These include:

• Coolant warning lamp issues in 2020-2021 Q3 models, where the coolant level appears full.
• Abnormal or no sound from the 3.0L engine sound generator in 2021-2023 models with the EA839 engine.
• Oil pan leaks identified in 2020-2023 Q3 vehicles.
• Belt noise originating from the starter generator in 2023 Q5 models.
• Detached USB trim panels in 2023 models.
• Noise from the front door trim panel in 2021-2022 e-tron Quattro / e-tron SB models.
• Noise from the front door speaker grill in 2021-2022 A5 models.

These additional topics highlight the comprehensive nature of Audi's internal communications regarding common vehicle concerns.

---

Source: NHTSA ID 10238198