B390C
Long Range Radar Sensor Module
B390C is an OBD-II diagnostic trouble code meaning: Long Range Radar Sensor Module. Common causes: mechanical damage to the radar, radar surface contamination. Estimated repair cost: $167–556.
Symptoms
- Disabling adaptive cruise control
- Automatic braking system malfunction
- A warning message appears on the dashboard
Causes
- Mechanical damage to the radar
- Radar surface contamination
- Open or short circuit in wiring harness
- Problems with module power supply
- Software glitch
- ECU malfunction
How to Fix
- Check the condition of the radar for damage and dirt
- Clean the radar surface if necessary
- Check the integrity of the wiring harness and connections
- Check the module supply voltage
- Scan the system for other errors
- If necessary, replace the long-range radar module or ECU
Related codes
Error B390C by Vehicle Brand
FAQ
What does the B390C code mean?
B390C is an OBD-II diagnostic trouble code that indicates: Long Range Radar Sensor Module
What causes a B390C error code?
The most common causes of B390C include: Mechanical damage to the radar; Radar surface contamination; Open or short circuit in wiring harness; Problems with module power supply.
How do I fix a B390C diagnostic trouble code?
To fix B390C: Check the condition of the radar for damage and dirt. Clean the radar surface if necessary. Check the integrity of the wiring harness and connections. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B390C?
Do not drive — repair immediately
How much does it cost to fix B390C?
The estimated repair cost for B390C is $167–556. Actual cost depends on your vehicle, location, and labor rates.
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