OBD Guide
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B1945

Air Bag Crash Sensor 2 Ground Circuit Open

B1945 is an OBD-II diagnostic trouble code meaning: Air Bag Crash Sensor 2 Ground Circuit Open. Common causes: broken shock sensor ground wire, oxidation or corrosion of contacts. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • The SRS indicator on the dashboard is on
  • The passive safety system may not work in an accident.
  • There may be errors in other SRS sensors

Causes

  • Broken shock sensor ground wire
  • Oxidation or corrosion of contacts
  • Shock sensor malfunction
  • Wiring harness damage
  • Problems with the SRS control unit

How to Fix

  1. Check the integrity of the shock sensor grounding circuit
  2. Inspect connectors and contacts for oxidation
  3. Replace damaged wires or sensor
  4. Reset the error and check the system for functionality

Related codes

B1946B1944B0100

FAQ

What does the B1945 code mean?

B1945 is an OBD-II diagnostic trouble code that indicates: Air Bag Crash Sensor 2 Ground Circuit Open

What causes a B1945 error code?

The most common causes of B1945 include: Broken shock sensor ground wire; Oxidation or corrosion of contacts; Shock sensor malfunction; Wiring harness damage.

How do I fix a B1945 diagnostic trouble code?

To fix B1945: Check the integrity of the shock sensor grounding circuit. Inspect connectors and contacts for oxidation. Replace damaged wires or sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1945?

Do not drive — repair immediately

How much does it cost to fix B1945?

The estimated repair cost for B1945 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat