OBD Guide
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B1937

Air Bag Passenger Pressure Switch Circuit Open Fault

B1937 is an OBD-II diagnostic trouble code meaning: Air Bag Passenger Pressure Switch Circuit Open Fault. Common causes: broken or damaged wiring harness, pressure sensor malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • The passive safety system may not work in the event of an accident.
  • Error B1937 is stored in the ECU memory

Causes

  • Broken or damaged wiring harness
  • Pressure sensor malfunction
  • Poor contact in connectors
  • Damage to the restraint system ECU

How to Fix

  1. Check the integrity of the wiring harness
  2. Check sensor connections and connectors
  3. Test the pressure sensor
  4. Replace sensor or wiring harness if necessary
  5. Reset the error and check the system

Related codes

B1938B1939B1940

FAQ

What does the B1937 code mean?

B1937 is an OBD-II diagnostic trouble code that indicates: Air Bag Passenger Pressure Switch Circuit Open Fault

What causes a B1937 error code?

The most common causes of B1937 include: Broken or damaged wiring harness; Pressure sensor malfunction; Poor contact in connectors; Damage to the restraint system ECU.

How do I fix a B1937 diagnostic trouble code?

To fix B1937: Check the integrity of the wiring harness. Check sensor connections and connectors. Test the pressure sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1937?

Do not drive — repair immediately

How much does it cost to fix B1937?

The estimated repair cost for B1937 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat