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2013 AUDI A3
2.0L TDI I4•FWD•AUTOMATIC•diesel•CJAA•turbo
3 active safety recalls on this vehicle — view recalls
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Repairs0Labor506Torque4360Fluid7DTC999Battery1Maintenance0Recalls3
B2AAAlow severityBody

Rain/Light Sensor Circuit Malfunction

on 2013 Audi A3 2.0L TDI I4 · FWD

What this code means

Malfunction in the rain and light sensor mounted on the windshield behind the rearview mirror. The sensor controls automatic wipers and headlights.

Symptoms

  • Auto wipers not working
  • Wipers activating in dry conditions
  • Auto headlights not responding
  • Rain sensor indicator flashing

Common causes

  • Faulty rain/light sensor
  • Windshield replacement with incorrect glass
  • Sensor lens contaminated
  • Wiring to sensor damaged
  • Sensor mounting gel pad deteriorated

Diagnostic steps

  1. Clean sensor lens area on windshield
  2. Check sensor mounting and gel pad
  3. Verify windshield is compatible with sensor
  4. Test sensor output with scan tool
  5. Inspect wiring at rearview mirror base

Repair notes

Replace rain/light sensor or reinstall with new gel pad. Ensure windshield has sensor-compatible coating.

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