📖 What Does B0078 Mean?
Symptoms
- • Vehicle will not start
- • or will start and then stall
- • or will not run due to immobilizer system malfunction
Common Causes
- • Faulty immobilizer key fob
- • faulty immobilizer system module
- • faulty wiring or connectors
- • software issue
Possible Solutions
1. Check the immobilizer key fob's battery level and replace if necessary. 2. Check the immobilizer system module for any signs of physical damage or corrosion. 3. Inspect and clean the wiring and connectors for any signs of damage or corrosion. 4. Update the vehicle's software if necessary. 5. Replace the immobilizer system module if none of the above steps resolve the issue.
Fixing this on your car?
Get a vehicle-specific repair guide with exact parts, oil specs, and torque settings for your make and model.
🚙 Get Vehicle-Specific Fix Guide
Select your vehicle to see a customized repair guide with exact parts and specifications:
❓ Common Questions About B0078
Can I drive with code B0078?
No, it is not recommended. Seeing code B0078 indicates a serious issue that could damage your engine or transmission if ignored. You should stop driving and have it inspected immediately.
How much does it cost to fix B0078?
The estimated repair cost for code B0078 is between $100 and $500. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
This repair is considered moderate. It may require specialized tools or significant disassembly. Professional help is recommended if you aren't an experienced DIYer.
Required Parts
Recommended Tools
Need a Pro?
Complex codes like B0078 can be tricky. Don't risk it if you're unsure.
Recommended Tool
Professional OBD2 Scanner
Read & clear codes, view live data, and reset service lights yourself.
View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with B0078
B0076: Seat Position Sensor Circuit Malfunction
B0077: Exterior Lighting Malfunction
B0079: Audio System Malfunction
B0080: Airbag System Malfunction
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system