OBD Guide
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B1909

Air Bag Crash Sensor 2 Ground Circuit Short To Ground

B1909 is an OBD-II diagnostic trouble code meaning: Air Bag Crash Sensor 2 Ground Circuit Short To Ground. Common causes: damage to the shock sensor wiring harness, short circuit to ground in the sensor circuit. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Airbag light is on
  • SRS may be disabled
  • Possible false deployment of airbags

Causes

  • Damage to the shock sensor wiring harness
  • Short circuit to ground in the sensor circuit
  • Airbag crash sensor 2 malfunction
  • Poor connection or corroded contacts

How to Fix

  1. Check wiring harness for damage
  2. Check the shock sensor connections for corrosion or poor contact.
  3. Check the resistance of the shock sensor
  4. Replace the shock sensor if necessary
  5. Clear error codes and check if error is returned

Related codes

B1908B1910B1911

FAQ

What does the B1909 code mean?

B1909 is an OBD-II diagnostic trouble code that indicates: Air Bag Crash Sensor 2 Ground Circuit Short To Ground

What causes a B1909 error code?

The most common causes of B1909 include: Damage to the shock sensor wiring harness; Short circuit to ground in the sensor circuit; Airbag crash sensor 2 malfunction; Poor connection or corroded contacts.

How do I fix a B1909 diagnostic trouble code?

To fix B1909: Check wiring harness for damage. Check the shock sensor connections for corrosion or poor contact.. Check the resistance of the shock sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1909?

Limited driving only, diagnose soon

How much does it cost to fix B1909?

The estimated repair cost for B1909 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat