U0104 on Audi Q5
Factory diagnostic protocol and troubleshooting wire for fault code U0104 specifically for the Audi Q5 (2020–2026, 2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV).
1. Symptoms of U0104 on Audi Q5
When the Engine Control Module (ECM/PCM) on your Audi Q5 (2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV) logs fault code U0104, drivers commonly observe:
2. Most Likely Causes on Audi Q5
Historical warranty claims and technical repair bulletins for Audi Q5 point to the following failure distribution:
3. Step-by-Step DIY Repair Guide for Audi Q5
Clean snow, ice, mud, or dead bugs off front radar emblem. on the Audi Q5 equipped with 2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV.
Verify power feed to radar sensor. on the Audi Q5 equipped with 2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV.
Execute optical/radar alignment procedure if bumper was removed. on the Audi Q5 equipped with 2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV.
Clear DTCs and test cruise on highway. on the Audi Q5 equipped with 2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV.
Equipment for Diagnosing Audi Q5 (U0104)
Audi Q5 OEM Replacement Sensor
Direct-fit replacement assembly engineered to OEM tolerances for Audi Q5.
AstroAI Auto-Ranging Digital Multimeter
Essential for testing 0.1V–5.0V sensor reference signals, ground continuity (<0.20Ω), and harness resistance.
BlueDriver Bluetooth Pro OBDII Scan Tool
Reads and clears enhanced codes (ABS, Airbag, Transmission, Engine) & live freeze-frame telemetry on phone.
Other Common Fault Codes on Audi Q5
Frequently diagnosed powertrain, emissions, and sensor trouble codes logged on the Audi Q5:
4. Audi Q5 U0104 FAQs
What causes code U0104 to trigger on a Audi Q5?
On the Audi Q5 (2.0L TFSI Turbo / 3.0L Turbo V6 (SQ5 349HP) / 55 TFSI e PHEV), U0104 is most frequently caused by Blocked or dirty front radar sensor in grille/bumper or Blown radar module fuse.
Where is the OBD-II port located on my Audi Q5?
On the Audi Q5, the 16-pin DLC diagnostic connector is located Left side under driver steering column. Plug in any standard OBD-II scanner with the ignition in the ON position to read freeze-frame parameters.
Can I safely drive my Audi Q5 with code U0104?
Yes. Normal driving is unaffected, but Adaptive Cruise Control will not engage. Given that U0104 carries a Low severity rating, we advise avoiding heavy towing or aggressive throttle inputs until sensor readings are verified.