mypros+
Error code reference

Bosch Washer Error Code R00

Interruption in the cable harness (supply line to water level sensor / flow sensor).

Bosch codesBosch washer codes

Interruption in the cable harness (supply line to water level sensor / flow sensor).

First step from the service manual

Replace cable harness.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

MyPros+ Max

Get the full diagnostic procedure for R00.

  • Step-by-step tests with expected resistance, voltage, and continuity values
  • Wiring diagram references and connector pinouts from the OEM service manual
  • Verified part numbers when replacement is required
Get the full procedure

$29/month · Cancel anytime · Or $9.95 3-day pass

What R00 means on a Bosch washer

Error code R00 on a Bosch washer signals an interruption in the cable harness that supplies the water level sensor (also called a pressure sensor) or the flow sensor. These sensors are critical for monitoring water intake: the water level sensor measures how much water is in the drum using air pressure through a small hose, while the flow sensor tracks the volume of water entering the machine. When the control board loses electrical continuity to either sensor through the supply wiring, it throws R00 to indicate the circuit is open or broken.

The most common root cause is physical damage to the wiring harness itself. Wires in this harness can fray, break internally, or pull loose from their connectors due to vibration over years of use, pinching during installation, or rodent damage. Corroded connector pins can also create enough resistance to interrupt the signal. Because the cable harness is a passive wiring component rather than an active electronic part, a fault in it will prevent the control board from receiving any valid sensor data, which stops the wash cycle entirely as a protective measure.

Diagnosis should begin with a visual inspection of the wiring harness running from the control board to the water level sensor and flow sensor. Look for pinched, burnt, or broken wires and check that all connectors are fully seated and free of corrosion. If the harness shows physical damage or continuity testing with a multimeter reveals an open circuit in any wire, replacement of the harness is the recommended corrective action.

Source: manufacturer service documentation.

Common causes of R00

  1. 01

    Broken or frayed wire in the harness

    Part replacement

    Vibration over time or physical pinching during installation can cause internal wire breaks even when the outer insulation looks intact. Use a multimeter to check continuity along each wire in the harness to identify a break.

  2. 02

    Loose or disconnected connector

    Wiring / connection

    The harness connectors at either the sensor end or the control board end may have worked loose from vibration or improper handling during past service. Inspect all connectors along the harness and press each firmly until it clicks into place.

  3. 03

    Corroded connector pins

    Wiring / connection

    Moisture exposure inside the cabinet can cause pin corrosion at the harness connectors, increasing resistance enough to interrupt the signal. Look for green or white oxidation on the metal pins and clean or replace the connector if corrosion is present.

  4. 04

    Harness damaged during a previous repair

    Part replacement

    If the washer was serviced recently, the harness may have been pinched, cut, or improperly routed during reassembly. Trace the full length of the harness visually for any signs of damage near panel edges or mounting brackets.

  5. 05

    Faulty water level sensor or flow sensor

    Part replacement

    In some cases the sensor itself has failed internally in a way that presents as an open circuit on the supply line. If the harness tests good for continuity and all connections are secure, test or replace the sensor before replacing the full harness.

See the test procedure for each cause

Frequently asked questions about R00

What does R00 mean on a Bosch washer?
R00 indicates an interruption in the cable harness that supplies power and signal to the water level sensor or flow sensor. The control board cannot detect a valid reading from those sensors because the wiring circuit is open or broken. This causes the washer to stop operation as a safety precaution. The fix typically involves inspecting and replacing the affected wiring harness.
Can I fix error code R00 on my Bosch washer myself?
A knowledgeable DIYer can attempt this repair by first unplugging the machine, then tracing and inspecting the wiring harness from the control board to the water level and flow sensors. Reconnecting a loose connector or cleaning corroded pins may resolve the issue without parts. If a wire is broken or the harness is physically damaged, replacing the harness requires basic electrical skills and sourcing the correct replacement part for your model.
Is it safe to keep using my Bosch washer when error code R00 is showing?
It is not recommended to continue running the washer while R00 is active. The water level sensor is what prevents the machine from overfilling, and without reliable sensor communication the washer cannot control water intake safely. Continued use risks water overflow or flooding inside the cabinet.
How much does it cost to repair a Bosch washer showing error code R00?
If only a connector needs reseating or cleaning, there may be little to no parts cost, though a service call fee typically runs in the range of $75 to $150. If the cable harness requires replacement, parts and labor combined generally fall in the range of $100 to $300 depending on the specific model and local labor rates. Sensor replacement, if required, adds to that estimate.
Will resetting my Bosch washer clear the R00 error code?
A reset may temporarily clear the error display, but the code will return as soon as the control board attempts to communicate with the sensor and finds the circuit still open. Because R00 is caused by a physical wiring fault rather than a software glitch, the underlying harness issue must be corrected before the error will stay cleared.

Related Bosch washer codes

All Bosch washer codes
View all 123 Bosch washer codes

78,000+ service manuals · 160,000+ error codes · 55+ brands

Get Started

$29/month · Cancel anytime · Or $9.95 3-day pass