OBD Guide
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B1931

Air Bag Crash Sensor 1 Feed/Return Circuit Failure

B1931 is an OBD-II diagnostic trouble code meaning: Air Bag Crash Sensor 1 Feed/Return Circuit Failure. Common causes: broken wires, short circuit. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • SRS light is on
  • The security system is not activated during testing
  • Error B1931 in diagnostic memory

Causes

  • Broken wires
  • Short circuit
  • Faulty shock sensor
  • Problems with the SRS module
  • Oxidation of contacts

How to Fix

  1. Visual inspection of the sensor wiring harness
  2. Checking circuit resistance with a multimeter
  3. SRS module diagnostics
  4. Replacing the shock sensor if necessary
  5. Resetting errors and checking the system

Related codes

B1932B1930B1921

FAQ

What does the B1931 code mean?

B1931 is an OBD-II diagnostic trouble code that indicates: Air Bag Crash Sensor 1 Feed/Return Circuit Failure

What causes a B1931 error code?

The most common causes of B1931 include: Broken wires; Short circuit; Faulty shock sensor; Problems with the SRS module.

How do I fix a B1931 diagnostic trouble code?

To fix B1931: Visual inspection of the sensor wiring harness. Checking circuit resistance with a multimeter. SRS module diagnostics. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1931?

Limited driving only, diagnose soon

How much does it cost to fix B1931?

The estimated repair cost for B1931 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat