P0AE2Hybrid/EV Battery Precharge Contactor Circuit Stuck Closed
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0AE2 means the precharge path conducts although it should be open, for example welded contacts or a precharge switch that no longer turns off. GM's 2011 Volt table checks it once per precharge event: if the bus voltage already exceeds 80 % of pack voltage before precharge begins, the precharge FET is judged stuck closed, 4 of 4 samples, Type A with MIL after one trip. Mitsubishi lists P0AE2 as charging contactor seizure on the 2012 i-MiEV (TSB-12-54-014). Audi names it for the 2022 e-tron GT with a software fix, and Dodge and Jeep list P0AE2-00 for the 2025 Charger EV and 2024 Wagoneer S, where a battery pack replacement may be required. The car may refuse to start.
- What you may notice
- Vehicle does not become ready to drive
- MIL and hybrid or EV warning on
- Wrench symbol or service message in the cluster
- Likely causes
- LikelyPrecharge contactor contacts welded or precharge switch shorted
- PossibleBattery controller software sets the code falsely (Audi, Stellantis bulletins)
- RareContactor driver held on by a short to power
- RareBus voltage not discharged before the next precharge
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €150 – €6,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.