B0059 high Severity

B0059: Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range

Airbag warning light illuminated; potential SRS system disablement and loss of pretensioner deployment in a crash

Overview

B0059 indicates an electrical fault in the right front/passenger seatbelt pretensioner deployment loop — short to ground, short to voltage, or resistance out of range.

Common Symptoms

  • Airbag/SRS warning light illuminated
  • Possible disabling of supplemental restraint system
  • Passenger seatbelt pretensioner may not deploy in collision

Most Common Causes

Short to ground or voltage in pretensioner deployment circuit high

Circuit high/low wires may contact ground or power, common trigger for B0059 detection

Damaged or corroded wiring/connectors high

Wiring harness issues between the SDM and pretensioner often cause out-of-range voltage

Faulty seatbelt pretensioner unit medium

Internal pretensioner malfunction can produce abnormal resistance/voltage

Malfunctioning Supplemental Restraint (SRS) control module medium

Faulty SDM may misinterpret loop conditions or fail to properly monitor circuit

Diagnostic Steps

  1. Connect advanced scan tool to vehicle and retrieve SRS-related codes
    Expected: Presence of B0059 and any related SRS codes
    Interpretation: Confirms electrical fault in pretensioner loop requiring further inspection
  2. Perform visual inspection of wiring harness and connectors for the right front/passer pretensioner
    Expected: Look for chafing, corrosion, loose or damaged terminals
    Interpretation: Physical damage often correlates with electrical abnormalities causing code
  3. Measure resistance and voltage in pretensioner high/low circuits with multimeter
    Expected: Resistance within manufacturer spec and no unintended voltage to ground
    Interpretation: Out-of-range resistance or unexpected voltage identifies circuit fault
  4. If wiring and pretensioner unit test good, evaluate SRS control module function
    Expected: Module self-test reports normal behavior
    Interpretation: If module fails tests, it may misdiagnose circuit leading to false code

Repair Solutions

Repair or replace damaged wiring and connectors medium
Estimated Cost: $150 - $400

Wiring repair often resolves voltage anomalies triggering B0059

Replace passenger seatbelt pretensioner unit medium
Estimated Cost: $200 - $800

Required if pretensioner resistance or internal failure is confirmed

Replace or reprogram Supplemental Restraint (SRS) control module hard
Estimated Cost: $500 - $1500

Only applies if SDM is verified faulty or fails diagnostic tests

Common Misdiagnoses

Avoid these common diagnostic mistakes:

  • Driver-side airbag sensor fault code (e.g., confusing B0059 with another SRS error)
  • Misattributing code to general body electronics rather than seatbelt pretensioner loop

Frequently Asked Questions

What does the B0059 code mean?

Technically, the B0059 code represents Right Front/Passenger Pretensioner Deployment Loop Voltage Out of Range. It usually points to a fault within the Sensors.

Can B0059 cause engine damage?

You should treat B0059 as a high issue. Airbag warning light illuminated; potential SRS system disablement and loss of pretensioner deployment in a crash

Common signs of the B0059 error code

Common symptoms include: Airbag/SRS warning light illuminated, Possible disabling of supplemental restraint system, Passenger seatbelt pretensioner may not deploy in collision. You might also notice the Check Engine Light is on.

What causes the B0059 code?

Potential culprits include: Short to ground or voltage in pretensioner deployment circuit, Damaged or corroded wiring/connectors, Faulty seatbelt pretensioner unit. A proper diagnosis is recommended.

Is B0059 expensive to fix?

Expect to pay around $400 if the issue is a Repair or replace damaged wiring and connectors, but up to $1500 if the Replace or reprogram Supplemental Restraint (SRS) control module needs replacement.

Does B0059 affect Ford, Toyota, or Honda?

The B0059 code is a generic powertrain code, meaning it applies to almost all makes and models, such as Honda, Toyota, VW, Ford, and Chevy.

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