FORD Error Code B0020: Causes, Symptoms and Repair
🚨 Meaning of FORD Code B0020
Code B0020 is related to the vehicle’s Supplemental Restraint System (SRS). It is recorded when the Restraint Control Module (RCM) detects a short circuit between the driver’s seat side airbag circuits and another SRS component.
When this fault is detected, the airbag warning light illuminates on the dashboard.
🔎 Possible Causes
FORD code B0020 can be triggered by several issues, including:
- Faulty left seat side airbag
- Damaged left seat side airbag wiring harness (open or shorted wire)
- Poor electrical connection in the left seat airbag circuit
❗ Associated Symptoms
- Airbag light illuminated on the dashboard
🛠️ How to Repair FORD Code B0020?
- Visually inspect the wiring harness and connectors of the left seat side airbag.
- Check electrical connections, look for broken, bent, pushed in or corroded connector pins.
- Look for any damaged components and replace them if necessary.
- Clear the error code using a diagnostic tool after repair and check if it reappears.
📌 When is the Code Detected?
This code is set when the RCM detects a short circuit between the driver’s seat side airbag circuits and another SRS component.
When the system’s normal loop is repaired (short circuit, open circuit or low resistance), the signal cross-coupling diagnostic automatically resumes.