OBD Guide
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B1439

Intermittent Device Voltage

B1439 is an OBD-II diagnostic trouble code meaning: Intermittent Device Voltage. Common causes: oxidation or loosening of contacts in connectors, wiring harness damage. Estimated repair cost: $33–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$33–167 (est.)

Symptoms

  • The passive safety system malfunction lamp is on
  • Periodic loss of voltage on sensors
  • Incorrect operation of airbags

Causes

  • Oxidation or loosening of contacts in connectors
  • Wiring harness damage
  • Restraint module malfunction
  • Power problems (blown fuse, poor ground)

How to Fix

  1. Conduct a visual inspection of the wiring harness and connectors for damage.
  2. Check voltage and continuity using a multimeter
  3. Inspect and replace fuses if necessary
  4. If no problem is found, diagnose the passive restraint system module

Related codes

B1440B1441B1442

FAQ

What does the B1439 code mean?

B1439 is an OBD-II diagnostic trouble code that indicates: Intermittent Device Voltage

What causes a B1439 error code?

The most common causes of B1439 include: Oxidation or loosening of contacts in connectors; Wiring harness damage; Restraint module malfunction; Power problems (blown fuse, poor ground).

How do I fix a B1439 diagnostic trouble code?

To fix B1439: Conduct a visual inspection of the wiring harness and connectors for damage.. Check voltage and continuity using a multimeter. Inspect and replace fuses if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1439?

Do not drive — repair immediately

How much does it cost to fix B1439?

The estimated repair cost for B1439 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat