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16955/P0571/001393 - Brake Light Switch (F): Implausible Signal

Possible Symptoms

  • Malfunction Indicator Lamp (MIL) active
  • Glow Plug Indicator Light active
  • Brake Light(s) not working

Possible Causes

  • Wiring and/or Connectors faulty
  • Fuse(s) faulty
  • Wrong Brake Light Bulb installed (21W instead of 5/21W)
  • Brake Light Bulb(s) faulty
  • Brake Light Switch (F) faulty

Possible Solutions

  • Check Wiring or Connectors
  • Check/Replace Fuse(s)
  • Check/Replace Brake Light Bulb(s)
  • Check/Replace Brake Switch (F)

Special Notes

  • Brake Light Switches (F) have the reputation of breaking quite often.
  • When found in the NAR market 2011+ (16/AJ) Jetta Sedan using PR code AW0 Version Low in addition to a BCM25/PQ25 BCM check the wiring to/from the brake light switch. Internal Ref: ST?ID=66540