Body, generic

B011F Fluid Reservoir Level Sensor D

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

B011F reports level sensor D. A recurring weakness of float switches in washer bottles is motion: fluid slopping around in corners or under braking lifts and drops the float and can set it spinning. Continental's patent US9003878B2 answers with a float guided in an angled carrier, ribs that stop it turning and an optional slosh guard, so one design suits side or bottom mounting. The other weak point is the wiring: FCA parts tip 68225064A tells technicians who face a false low-fluid message to check circuits W1 and W11 at a 48-way connector before condemning the float sensor. Which tank letter D refers to is left open by the makers, and nobody documents B011F publicly. Expect flickering or false level messages.

Likely causes

Loose or corroded pins at an intermediate harness connector
Float moving freely with sloshing fluid, guide or slosh guard broken
Level sensor D itself defective

Symptoms

  • Level warning switching on and off while driving, especially in bends
  • False low-level message with a full reservoir

Repair estimate

DifficultyMediumDIY possible
Parts and labour€20–200
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fluid reservoir level sensor dsensor wiring

Related codes

B011CB011DB011EB0120B0121

References: patents.google.com, static.nhtsa.gov.