OBD Guide
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B1B42

Left Front Inner Parking Aid Sensor

B1B42 is an OBD-II diagnostic trouble code meaning: Left Front Inner Parking Aid Sensor. Common causes: mechanical damage to the sensor, sensor contamination. Estimated repair cost: $56–167.

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

Symptoms

  • The parking system does not respond to obstacles
  • False obstacle warnings
  • No sound signal when parking

Causes

  • Mechanical damage to the sensor
  • Sensor contamination
  • Wiring harness damage
  • Bad sensor connection
  • Internal sensor fault

How to Fix

  1. Check the condition of the sensor for damage
  2. Clean the sensor from dirt
  3. Check sensor connection and wiring harness
  4. Replace sensor if necessary
  5. Reset the error with an OBD-II scanner

Related codes

B1B41B1B43B1B44

FAQ

What does the B1B42 code mean?

B1B42 is an OBD-II diagnostic trouble code that indicates: Left Front Inner Parking Aid Sensor

What causes a B1B42 error code?

The most common causes of B1B42 include: Mechanical damage to the sensor; Sensor contamination; Wiring harness damage; Bad sensor connection.

How do I fix a B1B42 diagnostic trouble code?

To fix B1B42: Check the condition of the sensor for damage. Clean the sensor from dirt. Check sensor connection and wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1B42?

Limited driving only, diagnose soon

How much does it cost to fix B1B42?

The estimated repair cost for B1B42 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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