AutoCodes – Toyota – B1901 Toyota

B1901 Toyota Code - Open in Front Pretensioner Squib Right Circuit

Quick Answer

The Front Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1901 Toyota indicates Open in Front Pretensioner Squib Right Circuit.
Common causes: Common causes include Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right), Front Seat Outer Belt Assembly Right harness is open or shorted, Front Seat Outer Belt Assembly Right circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 40,967

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 03, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1901 Toyota Description

The Front Pretensioner Squib Right (RH) Circuit consists of the Center Airbag Sensor Assembly and Front Seat Outer Belt Assembly Right (RH). This circuit instructs the Supplemental Restraint System (SRS) to deploy when the deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Front Pretensioner Squib Right Circuit.

OBDII Code B1901 Toyota - Open in Front Pretensioner Squib Right Circuit - AutoCodes.com — B1901 Toyota Code - Open in Front Pretensioner Squib Right Circuit

What does this mean?

What are the Possible Causes of the DTC B1901 Toyota?

Faulty Front Seat Outer Belt Assembly Right (RH) (Front Pretensioner Squib Right)
Front Seat Outer Belt Assembly Right harness is open or shorted
Front Seat Outer Belt Assembly Right circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1901 Toyota?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1901 Toyota code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1901 Toyota code?

Need more information on how to fix the B1901 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1901 Toyota code diagnosed by a professional: Find a repair shop in your area

Information for Specific Toyota Models

B1901 2013 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit
B1901 2014 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit
B1901 2015 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit
B1901 2016 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit
B1901 2017 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit
B1901 2018 Toyota RAV4 — Open in Front Pretensioner Squib Right Circuit

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1901 Toyota Code

1. What are the common symptoms of OBDII code B1901 in a Toyota related to the "Open in Front Pretensioner Squib Right Circuit"?

The common symptoms include the airbag warning light illuminating on the dashboard and the airbag system being disabled.

2. What are the possible causes of the OBDII code B1901 in a Toyota?

The code B1901 typically indicates an open circuit in the front pretensioner squib right circuit, which could be caused by a faulty pretensioner squib, damaged wiring, or a poor connection.

3. How serious is the OBDII code B1901 in a Toyota?

The OBDII code B1901 is related to the airbag system, so it is important to address this issue promptly. Driving with a malfunctioning airbag system can compromise the safety of the vehicle occupants in the event of a collision.

4. Can I drive my Toyota with the OBDII code B1901 present?

It is not recommended to drive the vehicle with the OBDII code B1901 present, as the airbag system may not deploy properly in the event of an accident. It is advisable to have the issue diagnosed and repaired by a qualified technician.

5. How can I diagnose and repair the OBDII code B1901 in my Toyota?

Diagnosing and repairing the B1901 code typically involves inspecting the front pretensioner squib right circuit, checking for continuity in the wiring, and testing the components for faults. It is recommended to seek assistance from a professional mechanic for an accurate diagnosis and proper repair.

6. Is it possible to reset the OBDII code B1901 in a Toyota without fixing the underlying issue?

While you may be able to clear the error code temporarily using an OBDII scanner, the code is likely to reappear until the underlying issue with the front pretensioner squib right circuit is resolved.

7. Can the OBDII code B1901 be triggered by a loose connection in a Toyota?

Yes, a loose or poor connection in the front pretensioner squib right circuit can trigger the OBDII code B1901. It is important to check all connections and ensure they are secure during the diagnostic process.

8. How much does it typically cost to repair the OBDII code B1901 in a Toyota?

The cost of repairing the OBDII code B1901 can vary depending on the specific problem and the labor rates of the repair shop. It is advisable to get a diagnostic assessment to receive an accurate estimate for the repair.

9. Are there any safety precautions to take when working on the front pretensioner squib right circuit in a Toyota?

When working on the airbag system, including the front pretensioner squib right circuit, it is crucial to disconnect the vehicle's battery and wait for the capacitors to discharge to prevent accidental deployment of the airbags.

10. Can the OBDII code B1901 in a Toyota be caused by water damage?

Yes, water damage can potentially cause issues with the front pretensioner squib right circuit, leading to the triggering of the OBDII code B1901. It is important to inspect for any signs of water intrusion and address them during the repair process.