Diagnostic article Generic OBD-II
P0AEA: Battery input four circuit low requires a contrasting temperature pattern
Interpret the GM P0AEA hot-indication criterion using input four and at least one of its cooler peers.
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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.
P0AEA is the battery temperature input-four circuit-low monitor. The source represents its failure as input four above 95°C while at least one of inputs one, two or three is below 70°C. The electrical label therefore should not be rewritten as a low-temperature complaint.
The full pattern is more useful than the peak
The cooler-reference conditions are alternatives. One qualifying peer is sufficient for that part of the monitor, but the input-four peak alone is not the entire listed failure condition. The battery controller must also be in run mode with suitable low-voltage supply and no controller-performance fault.
Thirty failing samples within forty, at 100ms intervals, make up the documented decision. Preserve duration and simultaneous values rather than only a single maximum-temperature screenshot.
Separate signal diagnosis from thermal conclusions
P0AE9 checks input-four rationality with a different three-way comparison. P0AEA addresses the circuit-low category. Neither code alone proves a physical hot spot or identifies the sensor's location in the pack.
A technician needs the correct sensor map, controller calibration and circuit procedure to distinguish a sensor/input problem from a credible thermal event. The document supplies no replacement decision or live measurement instructions. High-voltage battery access must follow professional isolation and verification requirements; the apparent temperature direction does not reduce the electrical hazard.
Input-four circuit high, P0AEB, evaluates the opposite signal extreme.
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 237.
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
Hybrid/EV Battery Temperature Sensor D 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