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DTC codes / B09xx · Airbags, seats, doors, lights and comfort systems / B0920

B0920Washer Pump Circuit

B0920 indicates that the body control module (BCM) has detected a fault in the windshield washer pump circuit, which typically means the pump motor is not drawing the expected current when activated. The BCM monitors the circuit for open, short-to-ground, or short-to-battery conditions and sets this code when the feedback voltage falls outside the normal range during a wash command.

SystemBody
Code typeGeneric (all makes)
SeverityLow
Fix difficultyIntermediate
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • The windshield washer spray does not work when the stalk or button is pressed
  • The washer pump runs continuously even with the switch off
  • A warning light or message on the dash indicating a washer system fault
  • Often no symptoms besides the warning light, especially if the pump is only intermittently failing
  • Blown fuse for the washer circuit
  • No sound from the washer pump when activated

Common causes, most likely first

  1. Failed washer pump motor (open winding or seized)
  2. Blown fuse in the washer pump circuit
  3. Corroded or disconnected electrical connector at the pump
  4. Damaged wiring harness (open, short to ground, or short to power)
  5. Faulty washer switch on the steering column or dash
  6. Internal BCM driver failure (less common)

How to diagnose and fix it

  1. Check the fuse for the washer pump circuit and replace if blown
  2. Inspect the pump connector for corrosion, tightness, and clean terminals
  3. Test the pump motor directly with 12 volts to confirm it operates
  4. Measure resistance across the pump motor terminals to check for an open winding
  5. Check for voltage at the pump connector when the washer switch is activated
  6. Test the washer switch for continuity and proper signal to the BCM
  7. Inspect the wiring harness for damage and repair as needed

Washer Pump Circuit Quirks You Should Know

  • A seized washer pump can blow the fuse repeatedly, so always check the pump for mechanical binding before replacing fuses.
  • Corrosion at the pump connector is a common cause on vehicles exposed to road salt, often mimicking a failed pump.
  • The BCM may set B0920 if the washer switch is stuck closed, causing the pump to run continuously and overheat.
  • Aftermarket replacement pumps with incorrect resistance can trigger the code even when they function, so verify specifications.
  • The code can be set by a short to ground in the wiring that only occurs when the harness is wet, leading to intermittent failures.

Can I keep driving with B0920?

The vehicle remains safe to drive because the washer pump does not affect engine, steering, or braking, but visibility can be reduced in wet or dirty conditions if the washers are needed. Avoid driving in conditions that require frequent windshield cleaning until the fault is repaired.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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