OBD Guide
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B1142

Diagnosis Sensor Unit

B1142 is an OBD-II diagnostic trouble code meaning: Diagnosis Sensor Unit. Common causes: damage to the sensor diagnostic unit, short circuit or break in the wiring harness. 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
  • Lack of system response to emergency situations
  • Errors in other passive safety systems

Causes

  • Damage to the sensor diagnostic unit
  • Short circuit or break in the wiring harness
  • Contact corrosion
  • Software block failure

How to Fix

  1. Check wiring harness for damage
  2. Check the contacts of the diagnostic unit
  3. Scan the block for additional errors
  4. Replace the diagnostic unit if necessary

Related codes

B1140B1141B1143

FAQ

What does the B1142 code mean?

B1142 is an OBD-II diagnostic trouble code that indicates: Diagnosis Sensor Unit

What causes a B1142 error code?

The most common causes of B1142 include: Damage to the sensor diagnostic unit; Short circuit or break in the wiring harness; Contact corrosion; Software block failure.

How do I fix a B1142 diagnostic trouble code?

To fix B1142: Check wiring harness for damage. Check the contacts of the diagnostic unit. Scan the block for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1142?

Do not drive — repair immediately

How much does it cost to fix B1142?

The estimated repair cost for B1142 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat