Disable one thermal sensor from laptop

Dell Latitude E5550 sometimes reboots without no reason. I made a script that run sensors once per second, and it contained lines like Ambient: +39.0°C Ambient: +38.0°C Ambient: +44.0°C Ambient: +38.0°C Ambient: N/A Ambient: +127.0°C Ambient: +127.0°C Ambient: +38.0°C so quite clearly one thermal sensor is failing. (CPU temp sensor seems to work.) First, why sensors show for example dell_smm-virtual-0 Adapter: Virtual device Processor Fan: 0 RPM CPU: +46.0°C Ambient: +47.0°C SODIMM: +34.0°C Other: +30.0°C coretemp-isa-0000 Adapter: ISA adapter Package id 0: +52.0°C (high = +105.0°C, crit = +105.0°C) Core 0: +51.0°C (high = +105.0°C, crit = +105.0°C) Core 1: +52.0°C (high = +105.0°C, crit = +105.0°C) acpitz-acpi-0 Adapter: ACPI interface temp1: +25.0°C (crit = +107.0°C) temp2: +27.8°C (crit = +105.0°C) temp3: +29.8°C (crit = +105.0°C) i.e. what are all those temperatures? Second, can I disable shutdown from the ambient thermal sensor?