B1C4C
1st Row Passenger Seat Belt Buckle Tensioner Circuit Low
B1C4C is an OBD-II diagnostic trouble code meaning: 1st Row Passenger Seat Belt Buckle Tensioner Circuit Low. Common causes: oxidation or corrosion of contacts in the pretensioner connector, damaged or broken pretensioner circuit harness. Estimated repair cost: $33–278.
Symptoms
- The security system malfunction indicator on the dashboard is on
- Error code B1C4C in the control module memory
- Possible inability to activate the pretensioner during a collision
- Unstable operation of the passenger passive safety system
Causes
- Oxidation or corrosion of contacts in the pretensioner connector
- Damaged or broken pretensioner circuit harness
- Malfunction of the pretensioner solenoid or squib
- Loose electrical connection at battery terminals
- Low voltage on-board network of the car
- Security control module malfunction
- Pretensioner circuit fuse is broken or blown
- Incorrect installation or replacement of the seat belt
How to Fix
- Connect a diagnostic scanner and check the full list of error codes
- Check the voltage of the on-board network - it should be 12-14 volts with the engine running
- Visually inspect the pretensioner wiring harness for damage or chafing.
- Check the pretensioner connector for oxidation and clean the contacts with alcohol
- Measure the pretensioner circuit resistance using a multimeter
- Check the condition of the security fuse and replace if necessary
- Make sure the harness is securely connected to the restraint control module.
- Replace pretensioner or wiring harness if necessary
- Clear error memory and test drive to check
Related codes
FAQ
What does the B1C4C code mean?
B1C4C is an OBD-II diagnostic trouble code that indicates: 1st Row Passenger Seat Belt Buckle Tensioner Circuit Low
What causes a B1C4C error code?
The most common causes of B1C4C include: Oxidation or corrosion of contacts in the pretensioner connector; Damaged or broken pretensioner circuit harness; Malfunction of the pretensioner solenoid or squib; Loose electrical connection at battery terminals.
How do I fix a B1C4C diagnostic trouble code?
To fix B1C4C: Connect a diagnostic scanner and check the full list of error codes. Check the voltage of the on-board network - it should be 12-14 volts with the engine running. Visually inspect the pretensioner wiring harness for damage or chafing.. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B1C4C?
Limited driving only, diagnose soon
How much does it cost to fix B1C4C?
The estimated repair cost for B1C4C is $33–278. Actual cost depends on your vehicle, location, and labor rates.
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