B22A9: Integrated Dual Charge Module (IDCM) internal fault (Stellantis/Jeep 4xe)
Severity: medium
What it means: A Stellantis body code from the plug-in hybrid charging module. The IDCM (integrated dual charge module) is the onboard charger that turns wall power into battery charge. A Jeep bulletin for the 2024 Grand Cherokee 4xe ties B22A9-42 (ECU internal performance, general memory failure) to a high-voltage battery that won't take a charge. Other suffixes point to other internal faults.
Safe to drive? Usually drivable on gas, but the car won't charge. Check for open high-voltage battery recalls before charging.
Common symptoms
- Service Charging System message
- Red charge port light
- Plug-in hybrid won't charge at home or public chargers
Likely causes, ranked
- IDCM software or internal memory faultShop
- Failed IDCMShop
- Charging interrupted by a bad outlet or tripped circuitDIY
Vehicle-specific notes
- 2022–2025 Jeep Grand Cherokee 4xe: A 2024 owner's parts-store scan showed B22A9 and P0D21 with a Service Charging System message and a solid red charge port. Read the full answer · Source
DIY or shop?
Trying a different outlet and circuit is DIY. IDCM reprogramming or replacement is a dealer job.
Before you replace parts
- Try a different outlet and circuit, then a public Level 2 charger.
- Check your VIN for high-voltage battery recalls and charging-module bulletins.
- Ask the dealer to check the IDCM software level.
- Note the full code with its suffix (for example B22A9-42).
Safety / mechanic note
Verify with a mechanic. Leave high-voltage charging parts to a trained technician. A code points to a circuit or system, not always a specific part.