P0AE7: Hybrid/EV Battery Precharge Contactor A Control Circuit High
What to do
As P0AE2's caution — the rare version cooks a resistor inside the pack, so prompt rather than someday.
What this code means
The precharge contactor's command circuit reads high — a coil held energised keeps the resistor path connected, which is P0AE2's thermal risk arriving by the electrical route. Prompt for that reason; ordinary wiring the commoner finding.
Likely causes
Start here
- Wiring shorted to voltage · moderate
Less common
- Open circuit in control wiring · moderate
- Fault stored in the battery energy control module · specialist
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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