Diagnostic article Generic OBD-II
P0AEF: Inverter-A sensor circuit low produces a hot indicated temperature
Read the GM P0AEF PIM Temp 0 limit and distinguish it from a valid inverter-overtemperature diagnosis.
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Documented application
GM 2010 10OBDG10 Hybrid Diagnostics, only the cited controller and monitor. These are historical calibration examples; individual vehicle, engine and hardware applicability is not established.
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.
P0AEF monitors the low-voltage limit of inverter A's first temperature input, represented as PIM Temp 0 in this GM table. The listed failure is a reading above 125°C, near a zero-volt signal. The code name describes the electrical direction rather than a low physical temperature.
The row checks signal range
Wakeup must be on. The monitor uses 250 failing counts within a 350-count window at approximately 10.4ms intervals. This is a range-limit test; it does not by itself establish the true temperature of an inverter switching device.
P0AEE separately compares this channel with the inverter average after a long soak. That rationality check is inhibited by the circuit-limit faults, so an invalid PIM Temp 0 value should not be treated as a reliable participant in the comparison.
Preserve the raw interpretation
Save PIM Temp 0, its validity state and related inverter-temperature codes. If the scan tool presents only an averaged inverter temperature, it may conceal the single input that reached the fault limit.
The source does not prove a shorted sensor or specify a physical test point. Those details depend on the actual inverter and service procedure. A trained high-voltage technician must establish safe access and use the approved diagnostic method; do not probe energized power electronics or infer a failed inverter assembly from this code alone.
Source and applicability
GM 2010 10OBDG10 Hybrid Diagnostics, only the cited controller and monitor. These are historical calibration examples; individual vehicle, engine and hardware applicability is not established. GM PDF, page 289.
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
Drive Motor Inverter Temperature Sensor A Circuit Low
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