Code
B0133
Generic
B — Body
A/V Sensor Washer Fluid E Control Circuit
Views:
UK: 21
EN: 35
RU: 23
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between control module and washer fluid sensor/pump
- Corroded, loose or damaged connector at the sensor/pump or module
- Failed washer fluid level sensor or pump motor
- Faulty body control module (BCM) or sensor interface module
- Blown fuse or poor ground connection
- Intermittent contact from wiring chafing or water intrusion
Symptoms
- Washer fluid pump not operating or operates intermittently
- Washer fluid level warning lamp or message on dash
- Windshield washer function fails for one or both systems (front/rear)
- DTC B0133 stored and possibly lamp or MIL illumination related to body systems
- Intermittent operation or reduced pump speed
What to check
- Retrieve freeze frame and live data with a scan tool; note any related body or washer system codes
- Perform a visual inspection of washer pump, sensor, wiring and connectors for damage or corrosion
- Check relevant fuses and relays for the washer pump/sensor circuit
- Backprobe the connector at the washer pump/sensor and check supply voltage and ground while operating the washer
- Wiggle harness while operating system to reproduce intermittent fault
- Measure resistance of sensor or pump motor (compare to specification if available)
Signal parameters
- Supply voltage to pump/sensor: ~11–13.5 V with ignition ON (12V systems)
- Control/output circuit: switched 0 V (ground) or 12 V depending on module design — may be PWM
- Expected pump motor resistance: typically low (a few ohms to tens of ohms); open circuit indicates a failed motor
- Sensor resistance or voltage: varies by design — consult service data for correct values
- Ground continuity: near 0 ohms between connector ground and chassis ground
Diagnostic algorithm
- Record code(s) and freeze-frame data with a scan tool. Note if code is current or historic.
- Visually inspect washer pump, level sensor, connectors and wiring for damage, corrosion or water intrusion. Repair obvious issues.
- Check fuses and relays for the washer circuit; replace any blown fuse and retest.
- Backprobe the sensor/pump connector. With ignition ON and/or washer command active, verify supply voltage and ground/command signal at the connector.
- If supply voltage is present but no pump operation, measure pump motor resistance. If open or very high, replace pump.
- If no supply voltage at pump, trace wiring back to the body control module: check continuity, inspect for shorts to ground or battery, and repair wiring as necessary.
- If wiring and pump/sensor test good, check the control output from the BCM. If module output is absent or out of spec and wiring is good, consider BCM diagnosis or replacement per manufacturer procedures.
- After any repair, clear codes, cycle ignition and operate the washer system to verify repair. Re-scan for return of the code and road-test if required.
Likely causes
- Connector corrosion at washer fluid sensor or pump
- Broken wire or pinched harness in the engine bay or fender area
- Failed washer pump motor or internal sensor element
- Blown fuse supplying the washer pump/sensor circuit
- Damaged ground or poor chassis ground near the washer pump
Fault status
Status
B0133 — A/V Sensor Washer Fluid E Control Circuit: electrical fault detected (open/short/high resistance/intermittent)
Repair difficulty: Medium
Diagnostic time: 0.5-1.5 hours
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