E101 Serious Moderate DIY
Bosch Oven E101 — Cavity Temperature Sensor (PT500) Fault
Bosch Oven · Error code E101
What E101 Means
The main control is reading the oven cavity temperature probe (a PT500 RTD on most Bosch wall ovens) as out-of-range — open, shorted, or wildly off. The oven disables heat for safety.
Symptoms
- Oven heats then shuts off mid-bake
- Temperature appears wrong (very low or very high)
- Self-clean refuses to start
- E101 displayed during preheat
Common Causes
1
Failed PT500 sensor
Element open or out of resistance spec.
2
Broken or pinched sensor wire
Lead damaged where it exits the cavity wall.
3
Loose connector at control board
Sensor plug backed out from vibration or service.
4
Control board input fault
Bad A/D channel on the main control.
How to Fix It
- Power the oven off at the breaker for safety.
- Pull the oven enough to access the rear, or remove the back panel.
- Unplug the temperature sensor lead and measure resistance — a PT500 should read ~500 Ω at room temp, climbing with heat.
- Inspect the sensor wire from probe to plug for chafing or melt damage.
- Reseat the sensor connector at the main control board.
- Replace the sensor if resistance is open/shorted; replace the control board only if a known-good sensor still throws E101.
Parts You May Need
If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.
More Bosch Oven Codes
Verified against manufacturer documentation: genuinereplacementparts.com
Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician.