B2448: RESCU/VEMS Input Short to Ground
The B2448 code indicates that the control module has detected a short to ground in the input circuit of the RESCU/VEMS (Remote Emergency Satellite Cellular Unit / Vehicle Emergency Messaging System). This telematics system, integrated into the vehicle's communications architecture, manages emergency and remote messaging functions. The short to ground causes the voltage in the input circuit to drop below the expected threshold, preventing the module from properly processing activation or status signals, which can disable the vehicle's emergency response capabilities.
1. Commonly Affected Makes
2. Most Common Causes
- RESCU/VEMS circuit wiring harness shorted to ground
- Corroded, oxidized, or damaged pins in the RESCU/VEMS module connector
- Internal failure of the RESCU/VEMS module input circuit
- Short circuit in the input pins of the telematics or communications module
3. Symptoms You Will Notice
- Emergency call system (e.g., OnStar, BMW Assist) inoperative
- Vehicle messaging or telematics features unavailable
4. Step-by-Step Diagnosis
Scan for additional codes and check freeze frame data
Visually inspect the RESCU/VEMS wiring harness and connector for damage, corrosion, or shorts
Test the input circuit voltage at the module connector with a multimeter
If wiring is intact, suspect internal module failure and replace the RESCU/VEMS module
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, the vehicle remains drivable, but emergency response features like automatic crash notification may be disabled. It is recommended to repair promptly to restore safety functions.
How much does it cost to fix?▼
Repair costs typically range from $150 to $600, depending on whether the issue is a wiring repair ($150-$300) or module replacement ($400-$600).