OBD Guide
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B129D

Right Front Side Sensor Circuit Short To Ground Or Open

B129D is an OBD-II diagnostic trouble code meaning: Right Front Side Sensor Circuit Short To Ground Or Open. Common causes: broken wire in the sensor circuit, short circuit to ground. Estimated repair cost: $56–167.

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

Symptoms

  • The malfunction indicator on the instrument panel is on
  • Restraint system failure
  • Incorrect operation of related systems

Causes

  • Broken wire in the sensor circuit
  • Short circuit to ground
  • Sensor malfunction
  • Wiring harness damage
  • Corrosion of connectors

How to Fix

  1. Check the integrity of the wires in the sensor circuit
  2. Inspect connectors for corrosion or damage
  3. Check sensor resistance
  4. Replace sensor if necessary
  5. Clean or replace connectors

Related codes

B129CB129EB129F

FAQ

What does the B129D code mean?

B129D is an OBD-II diagnostic trouble code that indicates: Right Front Side Sensor Circuit Short To Ground Or Open

What causes a B129D error code?

The most common causes of B129D include: Broken wire in the sensor circuit; Short circuit to ground; Sensor malfunction; Wiring harness damage.

How do I fix a B129D diagnostic trouble code?

To fix B129D: Check the integrity of the wires in the sensor circuit. Inspect connectors for corrosion or damage. Check sensor resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B129D?

Do not drive — repair immediately

How much does it cost to fix B129D?

The estimated repair cost for B129D is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat