B0165

Code

Generic B — Body

Driver airbag circuit fault

Brand: Generic

Type: B — Body

Views: UK: 15 EN: 19 RU: 15

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Page language: EN

Causes

Open or short in driver airbag/squib wiring
Damage or wear in steering wheel clock spring/spiral cable
Poor/crushed/loose connector pins at the airbag module, steering wheel, or SRS control unit
Corrosion or water ingress in connectors or wiring
Faulty driver airbag module (squib)
Faulty airbag control module (SRS ECU) or internal driver-circuit driver

Symptoms

SRS / airbag warning lamp illuminated on dash
Driver airbag may be reported as disabled by diagnostic tool
Possible fault stored only when ignition on (no other drivability effects)
Intermittent lamp if wiring is intermittent

What to check

Read and record stored codes, freeze frame and readiness with an SRS-capable scan tool
Check battery voltage and charging system (low voltage can cause SRS faults)
Visually inspect steering wheel, clock spring area, and wiring harness for damage, loose connectors, or corrosion
Inspect connectors at the airbag module, SRS control unit and steering column for bent pins and corrosion
Perform continuity/resistance check of driver airbag squib circuit per manufacturer procedure (see safety notes)
Check for previous crash repairs and verify harness routing and pins were restored correctly

Signal parameters

Typical squib (driver airbag) continuity: low ohms when intact — commonly ~2–5 Ω (varies by vehicle). Open = OL/infinite. Short to low resistance (≈0 Ω) indicates short to power/ground
Circuit open = infinite resistance; short to ground/power =
Connector terminal voltage: monitored by SRS module; bus voltage normally ~12 V, but do not attempt to fire the squib — use scan tool data only
Fault status: short to ground, short to battery, open circuit or intermittent (depends on module reporting)

Diagnostic algorithm

Follow manufacturer SRS safety procedure before any work: disable battery negative, wait specified time (commonly 1–10 minutes) to let capacitors discharge, and take precautions to avoid static or accidental deployment
Use an SRS-capable scan tool: read and record B0165 and related codes, freeze frame and live data.
Clear codes and see if B0165 returns. If intermittent, test-drive/operate steering to reproduce.
Visually inspect steering wheel, clock spring, connectors and harness for damage, loose pins or corrosion.
With battery disconnected and SRS safety time observed, access driver airbag connector(s). Disconnect driver airbag module connector and inspect pins for damage/corrosion.
Measure resistance of the driver airbag squib circuit at the airbag connector and at the SRS control module harness: compare to manufacturer spec (typical intact squib a few ohms). Confirm continuity to SRS ECU and check for shorts to ground/power.
If open or short found, trace wiring to locate chafe, broken conductor, or damaged insulation; repair or splice per repair manual and recheck resistance.
If wiring and connectors are good but resistance is out of spec, replace driver airbag module (squib) or clock spring as indicated by measurements and visuals.
If wiring and airbag module check good, inspect/replace SRS control module connector or consider module fault — refer to manufacturer diagnostics before replacing module.
After repairs, clear codes and verify SRS lamp extinguishes and no codes return. Perform any required SRS module coding or system relearn.
Note: Always follow vehicle manufacturer procedures for handling and replacing airbag components; avoid using ohm meters on live inflator circuits and never attempt to fire airbags with non-approved equipment.