For Instant Pot, Pressure Sensor is faulty if ALL LEDS flash with a C6 error code. For Power Cooker XL, Pressure Sensor is faulty if ALL LEDS flash with a E4 error code
Caution: This pressure sensor is a generic part. After installation, it needs to be calibrated to reach safe and appropriate cooking pressure. It is the buyer's responsibility to ensure that both the installation and the calibration need to be done by experienced professionals such as licensed electricians to avoid bodily harm and property damages.