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Error code reference

Bosch Range Error Code E201

Cavity 2 (warming drawer) temperature sensor open

Bosch codesBosch range codes

Cavity 2 (warming drawer) temperature sensor open — temperature sensor disconnected or has a faulty connection; cooling fan will operate at high speed and heating will stop.

First step from the service manual

Check all connections and wires to temperature sensor. Check resistance of temperature sensor; if sensor tests OK, could be control module problem; if sensor fails, replace sensor.

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

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What E201 means on a Bosch range

The E201 error code on a Bosch range indicates that the temperature sensor for Cavity 2, which is the warming drawer, has an open circuit condition. An open circuit in this context means the control module is receiving no signal from the sensor, typically because the sensor circuit is broken, disconnected, or has failed internally. The warming drawer relies on this sensor to regulate heat accurately, and when the signal is lost, the appliance cannot safely continue normal heating operation.

When E201 is triggered, the control module responds with two protective actions: the cooling fan is forced to run at high speed, and all heating to the warming drawer is suspended. These are intentional safety behaviors designed to prevent overheating in the absence of reliable temperature feedback. The range will not resume normal warming drawer operation until the fault is resolved and the control module receives a valid sensor signal.

Diagnosing E201 begins with a physical inspection of all wiring and connectors leading to the warming drawer temperature sensor. Loose connectors, pinched wires, or corroded terminals are frequent culprits. If the wiring looks intact, the next step is to measure the resistance of the temperature sensor directly. A sensor reading outside the expected resistance range indicates a failed sensor that needs replacement. If the sensor tests within spec and connections are secure, the fault may originate in the control module itself, which would require further evaluation or replacement.

Source: manufacturer service documentation.

Common causes of E201

  1. 01

    Disconnected or loose sensor connector

    Wiring / connection

    The wiring connector at the temperature sensor may have come loose due to vibration or handling during cleaning or maintenance. Inspect the connector at both the sensor and the control harness end for secure seating.

  2. 02

    Failed temperature sensor

    Part replacement

    The temperature sensor itself may have developed an internal open circuit, meaning it no longer conducts electricity through its circuit. Testing the sensor's resistance directly will confirm failure; a sensor with an open circuit reads infinite or out-of-range resistance.

  3. 03

    Damaged or broken wiring

    Part replacement

    Wires running to the warming drawer sensor can become pinched, frayed, or broken, especially near bends or attachment points. A visual inspection followed by continuity testing of the wiring harness can identify any breaks.

  4. 04

    Corroded or burnt connector terminals

    Part replacement

    Heat exposure over time can cause corrosion or carbon buildup on the sensor connector terminals, increasing resistance to the point of an open circuit. Terminals should be inspected closely and cleaned or replaced if damaged.

  5. 05

    Faulty control module

    Part replacement

    If the sensor and all wiring test correctly, the control module may be failing to read the sensor signal properly. This is the least common cause and should only be considered after all other components have been ruled out.

See the test procedure for each cause

Frequently asked questions about E201

What does E201 mean on a Bosch range?
E201 indicates that the temperature sensor for Cavity 2, the warming drawer, has an open circuit and is not communicating with the control module. In response, the range shuts off heat to the warming drawer and runs the cooling fan at high speed. The code points to a disconnected sensor, broken wiring, or a failed sensor component. Resolving the fault requires inspecting the sensor connections and testing the sensor's resistance.
Can I fix E201 on my Bosch range myself?
A knowledgeable DIYer can often resolve E201 by checking and reseating the sensor's wiring connector, which requires no special tools and no parts. If the sensor itself has failed, replacing it is a straightforward repair, though you will need to identify the correct replacement part for your model. If the wiring and sensor both test fine, a control module fault is likely, and that repair is best handled by a qualified technician.
Is it safe to use my Bosch range while E201 is active?
The warming drawer will not heat while E201 is active, so that cavity cannot be used safely for its intended purpose. The rest of the range may continue to function depending on the model, but it is advisable to resolve the fault promptly. Operating appliances with active sensor faults for extended periods is not recommended, as the root cause could worsen over time.
Will resetting my Bosch range clear the E201 error?
A power reset may temporarily clear the error display, but if the underlying fault, such as a disconnected sensor or failed sensor component, is still present, E201 will return when the range powers back up and attempts to read the sensor. A reset alone is not a repair. The fault must be corrected at the component level before the error will stay cleared.
How much does it cost to repair a Bosch range E201 error?
If the fix is simply reseating a loose connector, the cost is minimal, covering only your time. Replacing a warming drawer temperature sensor typically costs between $30 and $80 for the part, plus labor if a technician performs the work. If the control module is the cause, parts alone can range from $150 to $400 or more depending on the model, making professional diagnosis before committing to that repair a worthwhile step.

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