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Home / DTC / B0131 — A/V Sensor Washer Fluid C Control Circuit

B0131 — A/V Sensor Washer Fluid C Control Circuit

Detailed page for trouble code B0131.

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Code

B0131

Generic B — Body

A/V Sensor Washer Fluid C Control Circuit

Brand: Generic
Type: B — Body
Views: UK: 21 EN: 22 RU: 17
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the washer fluid sensor C circuit
  • Corroded, loose or damaged connector at the sensor or module
  • Failed washer fluid level/pressure sensor C
  • Poor ground or power supply to the sensor
  • Water intrusion or contamination of connector or sensor
  • Faulty body control module (BCM) or related module

Symptoms

  • Washer fluid level warning lamp or message may illuminate
  • Washer fluid level reading incorrect or unavailable for the sensor labeled C
  • Possible inability of the system to operate associated functions that depend on fluid-level input
  • Related body system warnings or multiple body sensor DTCs if power/ground is shared

What to check

  • Read DTCs and freeze frame data with a scan tool; confirm B0131 is active or stored
  • Inspect sensor C connector and wiring harness for corrosion, pin damage, melting or signs of water entry
  • Check for aftermarket modifications near wiring harness that could have damaged wires
  • Verify related fuses and relays for the washer fluid circuit (if applicable)
  • Backprobe the sensor connector and check for proper reference voltage, ground and signal with key on (refer to service manual for expected values)
  • Wiggle test wiring while monitoring signal to reproduce intermittent faults

Signal parameters

  • Reference voltage present at sensor: typically a regulated 3–5 V reference or vehicle battery voltage depending on design (consult service manual)
  • Signal output: varies with sensor type — open/closed switch, resistance change, or voltage signal; should change when sensor or float is moved
  • Continuity: wiring between sensor and module should show continuity with ignition off (no open circuit)
  • Resistance to ground/power: no short to battery or ground; measured values depend on vehicle design

Diagnostic algorithm

  1. Retrieve and record DTCs and freeze frame data. Confirm code B0131 and whether other related DTCs are present.
  2. Visually inspect the washer fluid sensor C, harness and connector for corrosion, loose pins, damage or water intrusion. Repair or replace damaged connectors/wiring as needed.
  3. With connector disconnected, check sensor actuator/switch for proper mechanical operation (move float or actuator) and measure resistance/voltage change at the sensor terminals per service manual.
  4. Backprobe the sensor connector at the harness with the ignition on. Verify reference voltage, signal and ground are within expected ranges. Note any intermittent behavior while wiggling harness.
  5. If the sensor wiring shows open or short, trace and repair the affected wire(s). Use continuity and resistance checks from the sensor connector to the BCM connector.
  6. If wiring and connectors are good but sensor does not respond correctly when stimulated, replace the washer fluid sensor C and retest.
  7. If new sensor behaves the same and wiring is confirmed good, test or scan the body control module for faults. Repair or replace module per manufacturer procedures if module is faulty.
  8. Clear codes, operate the washer/vehicle through required test conditions, and verify the fault does not return.

Likely causes

  • Broken or chafed wire between sensor C and the BCM
  • Corroded connector pins at the washer fluid sensor or module
  • Failed washer fluid level sensor C element
  • Intermittent contact from water intrusion or debris

Fault status

⚠️ Status
Washer fluid sensor C control circuit malfunction detected. Check sensor, wiring and module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 1.5 hours

Similar codes

B0130 B0132 B0133 B0134 B0100
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Code

B0131

HUMMER B — Body

Right Heater Discharge Temperature Fault

Brand: HUMMER
Type: B — Body
Views: UK: 15 EN: 18 RU: 9
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Open or shorted wiring in the washer fluid sensor C circuit
  • Corroded, loose or damaged connector at the sensor or module
  • Failed washer fluid level/pressure sensor C
  • Poor ground or power supply to the sensor
  • Water intrusion or contamination of connector or sensor
  • Faulty body control module (BCM) or related module

Symptoms

  • Washer fluid level warning lamp or message may illuminate
  • Washer fluid level reading incorrect or unavailable for the sensor labeled C
  • Possible inability of the system to operate associated functions that depend on fluid-level input
  • Related body system warnings or multiple body sensor DTCs if power/ground is shared

What to check

  • Read DTCs and freeze frame data with a scan tool; confirm B0131 is active or stored
  • Inspect sensor C connector and wiring harness for corrosion, pin damage, melting or signs of water entry
  • Check for aftermarket modifications near wiring harness that could have damaged wires
  • Verify related fuses and relays for the washer fluid circuit (if applicable)
  • Backprobe the sensor connector and check for proper reference voltage, ground and signal with key on (refer to service manual for expected values)
  • Wiggle test wiring while monitoring signal to reproduce intermittent faults

Signal parameters

  • Reference voltage present at sensor: typically a regulated 3–5 V reference or vehicle battery voltage depending on design (consult service manual)
  • Signal output: varies with sensor type — open/closed switch, resistance change, or voltage signal; should change when sensor or float is moved
  • Continuity: wiring between sensor and module should show continuity with ignition off (no open circuit)
  • Resistance to ground/power: no short to battery or ground; measured values depend on vehicle design

Diagnostic algorithm

  1. Retrieve and record DTCs and freeze frame data. Confirm code B0131 and whether other related DTCs are present.
  2. Visually inspect the washer fluid sensor C, harness and connector for corrosion, loose pins, damage or water intrusion. Repair or replace damaged connectors/wiring as needed.
  3. With connector disconnected, check sensor actuator/switch for proper mechanical operation (move float or actuator) and measure resistance/voltage change at the sensor terminals per service manual.
  4. Backprobe the sensor connector at the harness with the ignition on. Verify reference voltage, signal and ground are within expected ranges. Note any intermittent behavior while wiggling harness.
  5. If the sensor wiring shows open or short, trace and repair the affected wire(s). Use continuity and resistance checks from the sensor connector to the BCM connector.
  6. If wiring and connectors are good but sensor does not respond correctly when stimulated, replace the washer fluid sensor C and retest.
  7. If new sensor behaves the same and wiring is confirmed good, test or scan the body control module for faults. Repair or replace module per manufacturer procedures if module is faulty.
  8. Clear codes, operate the washer/vehicle through required test conditions, and verify the fault does not return.

Likely causes

  • Broken or chafed wire between sensor C and the BCM
  • Corroded connector pins at the washer fluid sensor or module
  • Failed washer fluid level sensor C element
  • Intermittent contact from water intrusion or debris

Fault status

⚠️ Status
Washer fluid sensor C control circuit malfunction detected. Check sensor, wiring and module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 1.5 hours

Similar codes

B0130 B0132 B0133 B0134 B0100
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