Explanation of error codes for Apple Service Diagnostics (ASD) or Apple Hardware Test (AHT) - system sensor descriptions. For error codes starting with 4SNS, like 4SNS / 1 / 40000001 : VeAS-0.000. More explanation on AHT error codes here.
Mac Pro (Mid 2010)
Mac Pro (Mid 2010)
| ICAC | Current | CPU A, Core Low Side (Vcore) Current |
| ICBC | Current | CPU B, Core Low Side (Vcore) Current |
| Ie1S | Current | PCIe Slot 1, 12V Current |
| Ie2S | Current | PCIe Slot 2, 12V Current |
| Ie3S | Current | PCIe Slot 3, 12V Current |
| Ie4S | Current | PCIe Slot 4, 12V Current |
| IeAS | Current | PCIe BoostA, 12V Current |
| IeBS | Current | PCIe BoostB, 12V Current |
| IH1Z | Current | HDD1, 12V Current |
| IH2Z | Current | HDD2, 12V Current |
| IH3Z | Current | HDD3, 12V Current |
| IH4Z | Current | HDD4, 12V Current |
| IO0Z | Current | ODD, 12V Current |
| IH5Z | Current | HDD+ODD, 5V Current |
| IMAS | Current | DIMM, PP1V5_S3_MEMA Current |
| IMBS | Current | DIMM, PP1V5_S3_MEMB Current |
| IN0C | Current | IOH Core, PP1V1_S0_IOH Northbridge Current |
| Ip0C | Current | PSU, 12V Current (PSMI) |
| ICAB | Current | PVTT, CPUA Current |
| ICBB | Current | PVTT, CPUB Current |
| IS1C | Current | PP1V05_S0_SB Current |
| IS2C | Current | PP1V5_S0_SB Current |
| Ip1M | Current | PP12V_S0 CPUA 240V A Main Current |
| Ip2M | Current | PP12V_S0 CPUB 240V A Main Current |
| Ip3M | Current | PP12V_S0 MEMA 240V A Main Current |
| Ip4M | Current | PP12V_S0 MEMB 240V A Main Current |
| Ip5M | Current | PP12V_S0 MLB1 240V A Main Current |
| Ip6M | Current | PP12V_S0 MLB2 240V A Main Current |
| Ip7M | Current | PP12V_S0 PCIE1 240V A Main Current |
| Ip8M | Current | PP12V_S0 PCIE2 240V A Main Current |
| TA0P | Temperature | System Ambient Temperature |
| TCAC | Temperature | CPU A, Core 0 Relative Temperature to ProcHot (PECI) |
| TCAD | Temperature | Temperature, CPU A Tdiode |
| TCBC | Temperature | CPU B, Core 0 Relative Temperature to ProcHot (PECI) |
| TCBD | Temperature | CPU B Tdiode |
| TCAH | Temperature | CPU A, HeatSink |
| TCBH | Temperature | CPU B, HeatSink |
| Te1S | Temperature | PCIE slot 1 |
| Te2S | Temperature | PCIE slot 2 |
| Te3S | Temperature | PCIE slot 3 |
| Te4S | Temperature | PCIE slot 4 |
| Te5S | Temperature | PCIE RAID card |
| TH1P | Temperature | Drive Bay 1, HDD (On Drive Carrier) |
| TH2P | Temperature | Drive Bay 2, HDD (On Drive Carrier) |
| TH3P | Temperature | Drive Bay 3, HDD (On Drive Carrier) |
| TH4P | Temperature | Drive Bay 4, HDD (On Drive Carrier) |
| TM1P | Temperature | DIMM Proximity 1 (On Riser) |
| TM2P | Temperature | DIMM Proximity 2 (On Riser) |
| TM3P | Temperature | DIMM Proximity 3 (On Riser) |
| TM4P | Temperature | DIMM Proximity 4 (On Riser) |
| TM5P | Temperature | DIMM Proximity 5 (On Riser) |
| TM6P | Temperature | DIMM Proximity 6 (On Riser) |
| TM7P | Temperature | DIMM Proximity 7 (On Riser) |
| TM8P | Temperature | DIMM Proximity 8 (On Riser) |
| TMA1 | Temperature | DIMM, CPUA, SLOT1, CHA - SPD Temperature |
| TMA2 | Temperature | DIMM, CPUA, SLOT2, CHB - SPD Temperature |
| TMA3 | Temperature | DIMM, CPUA, SLOT3, CHC - SPD Temperature |
| TMA4 | Temperature | DIMM, CPUA, SLOT4, CHC - SPD Temperature |
| TMB1 | Temperature | DIMM, CPUB, SLOT5, CHA - SPD Temperature |
| TMB2 | Temperature | DIMM, CPUB, SLOT6, CHB - SPD Temperature |
| TMB3 | Temperature | DIMM, CPUB, SLOT7, CHC - SPD Temperature |
| TMB4 | Temperature | DIMM, CPUB, SLOT8, CHC - SPD Temperature |
| TN0D | Temperature | IOH Tdiode |
| TN0H | Temperature | IOH, HeatSink |
| Tp0C | Temperature | PS, AC/DC Supply 1 |
| Tp1C | Temperature | PS, AC/DC Supply 2 |
| VCAC | Voltage | CPU A, Core Voltage |
| VCBC | Voltage | CPU B, Core Voltage |
| Ve1S | Voltage | PCIe Slot 1, 12V Voltage |
| Ve2S | Voltage | PCIe Slot 2, 12V Voltage |
| Ve3S | Voltage | PCIe Slot 3, 12V Voltage |
| Ve4S | Voltage | PCIe Slot 4, 12V Voltage |
| VeAS | Voltage | PCIe BoostA, 12V Voltage |
| VeBS | Voltage | PCIe BoostB, 12V Voltage |
| VH1Z | Voltage | HDD1, 12V Voltage |
| VH2Z | Voltage | HDD2, 12V Voltage |
| VH3Z | Voltage | HDD3, 12V Voltage |
| VH4Z | Voltage | HDD4, 12V Voltage |
| VO0Z | Voltage | ODD, 12V Voltage |
| VH5Z | Voltage | HDD+ODD, 5V Voltage |
| VM1S | Voltage | PP1V5_S3_MEMA Voltage |
| VM2S | Voltage | PP1V5_S3_MEMB Voltage |
| VN0C | Voltage | PP1V1_S0_IOH Northbridge Voltage |
| Vp0C | Voltage | PSU, 12V Voltage |
| VCAB | Voltage | PPVTT_S0_CPUA Voltage |
| VCBB | Voltage | PPVTT_S0_CPUB Voltage |
| VS1C | Voltage | PP1V05_S0_SB Voltage |
| VS2C | Voltage | PP1V5_S0_SB Voltage |
| VS8C | Voltage | PP3V3_S5 Voltage |
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