Diagnostic article Generic OBD-II
P0DF6: Mazda ISG V-phase temperature input exceeds its upper boundary
Mazda P0DF6:00 monitors a high electrical input from the V-phase FET temperature sensor inside the ISG.
Read before applying this article
Documented application
Mazda3 01/2019 onward workshop edition d9n1-1a-22d_ver10, Mazda M Hybrid integrated starter generator internal FET temperature sensors; source procedure references SKYACTIV-G and SKYACTIV-X 2.0; verify vehicle equipment.
The code alone does not identify a failed part or establish that a vehicle is safe to drive. Confirm the vehicle, reporting module and applicable service procedure.
Mazda P0DF6:00 identifies high input from the integrated starter generator's internal V-phase FET temperature sensor. In generic terminology it is generator-inverter temperature sensor B circuit high. The documented condition is at least 2.95 V for a continuous half-second interval.
Preserve the channel and fault type
V-phase distinguishes the monitored channel from U- and W-phase. “High” distinguishes this entry from V-phase's low-input and internal-comparison faults. The manual uses the same service flow for those channels, so the phase designation does not imply a different external harness or repair method.
No temperature in degrees is supplied for the voltage boundary. Calling the code proof of inverter overheating would add a conclusion not established by the source.
The repeatability check controls the next decision
The procedure records the vehicle snapshot and classifies the fault as present or past. It rechecks a present fault after ignition cycling, while a historical entry is evaluated against captured speed and coolant-temperature conditions. CAN diagnosis precedes the eventual ISG replacement branch if the malfunction recurs.
This ordering matters because the source explicitly recognizes communication noise as a reason a DTC may appear without successful reproduction. A cleared entry or one normal displayed value is weaker evidence than the specified repeatability assessment.
The shared fail-safe removes hybrid electrical support and inhibits assistance, regeneration, and i-stop; continued use can drain the 12 V battery. Diagnosis and verification should remain with appropriately equipped technicians. The page provides no external connector test or internal sensor-service instruction for P0DF6.
Source and applicability
Mazda diagnostic chart, P0DF6. Mazda3 01/2019 onward workshop edition d9n1-1a-22d_ver10, Mazda M Hybrid integrated starter generator internal FET temperature sensors; source procedure references SKYACTIV-G and SKYACTIV-X 2.0; verify vehicle equipment. These values describe that documented monitor; they are not universal specifications for every vehicle displaying this code.
Article source documents
Source checks describe how the text was prepared; they do not certify a diagnosis or confirm compatibility with every vehicle using this code.
Original code reference
Dictionary definition
Generator Inverter Temperature Sensor B Circuit High
This definition retains its original catalog scope. The article above is limited to its explicitly documented application.
Reference scope
Generic OBD-II definition.
A manufacturer label does not establish the model, year, engine or module to which a diagnosis applies. Read the safety and diagnostic limits.
Definition source
- DTC Database: pinned community code definitions
Source checked · MIT