Rear Left Seat Belt Pretensioner Circuit
2011-2011 Mitsubishi Lancer 2.0L I4
The 2011 Mitsubishi Lancer is equipped with a 2.0L inline-4 engine. Below you'll find detailed b0056 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the rear left seat belt pretensioner deployment circuit.
Symptoms
- Airbag/seatbelt warning light on
- SRS code stored
- Rear left pretensioner inoperative
Common Causes
- Faulty pretensioner
- Wiring damage under rear seat
- Connector issue
- Water damage from rear window leak
Diagnostic Steps
- Scan SRS codes
- Inspect rear left pretensioner connector
- Check wiring under rear seat
- Look for moisture damage
Repair Notes
Replace pretensioner or repair wiring. Check for water intrusion.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
B0056 on Other Vehicles
Mitsubishi Colt JP
2005-2005 1.3L I4 4A90
Mitsubishi Colt JP
2005-2005 1.5L I4 4A91
Mitsubishi Colt JP
2006-2006 1.3L I4 4A90
Mitsubishi Colt JP
2006-2006 1.5L I4 4A91
Mitsubishi Colt JP
2007-2007 1.3L I4 4A90
Mitsubishi Colt JP
2007-2007 1.5L I4 4A91
Mitsubishi Colt JP
2008-2008 1.3L I4 4A90
Mitsubishi Colt JP
2008-2008 1.5L I4 4A91
Common Questions
What does code B0056 mean on a 2011-2011 Mitsubishi Lancer?
B0056 stands for "Rear Left Seat Belt Pretensioner Circuit". Malfunction in the rear left seat belt pretensioner deployment circuit.
What are the symptoms of B0056 on a Mitsubishi Lancer?
Common symptoms of B0056 include: Airbag/seatbelt warning light on, SRS code stored, Rear left pretensioner inoperative.
What causes B0056 on a 2011-2011 Mitsubishi Lancer?
Common causes of B0056 include: Faulty pretensioner, Wiring damage under rear seat, Connector issue, Water damage from rear window leak.
Last updated: March 2026