What it means
The restraint control module detected a fault in the passenger knee airbag deployment control circuit. The airbag may not deploy as intended in a crash.
At a glance
- Usually lights the airbag (SRS) or body-system warning light
How it works
The restraint control module monitors the passenger knee airbag deployment circuit and its connection to the knee airbag module. B0013 sets when it detects a fault in that deployment control, so the passenger knee airbag may not deploy as intended in a crash.
Common causes
Most likely first.
- Knee airbag deployment circuit or connector fault
- Knee airbag module fault
Symptoms
- Airbag warning light on
How to diagnose it
- Read B0013 and any accompanying SRS subfault information with an SRS-capable scan tool to identify the circuit condition indicated by the module.
- Follow the manufacturer's SRS disabling and waiting procedure, then visually inspect the passenger knee airbag area and accessible connectors for damage or poor connection.
- Check the knee airbag circuit wiring for an open, short, or connector fault using the vehicle's prescribed procedure.
- Test the passenger knee airbag module and its deployment circuit according to the manufacturer's specification before condemning either part.
- If the circuit and knee airbag pass their checks, investigate a restraint control module fault using the vehicle's diagnostic procedure.
Common fixes
- Correct a loose or damaged connection in the passenger knee airbag circuit using the prescribed SRS procedure.
- Repair damaged wiring to the passenger knee airbag module.
- Replace the knee airbag module if testing confirms it is faulty.
- Repair or replace the restraint control module only if circuit testing confirms an internal fault.
Can I keep driving?
You can generally drive the vehicle, but the passenger knee airbag may not deploy as intended in a crash. Arrange prompt SRS diagnosis and avoid handling or probing its connectors unless following the manufacturer's disabling procedure.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.