AutoCodes – Generic – B2A20

B2A20 Code - Ignition Stuck in Start

Quick Answer

The Instrument Cluster (IC) receives both the RUN/START and keep alive voltage from the Smart Junction Box (SJB). Common causes include Faulty Smart Junction Box (SJB), Smart Junction Box (SJB) harness is open or shorted, Smart Junction Box (SJB) 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: B2A20 indicates Ignition Stuck in Start.
Common causes: Common causes include Faulty Smart Junction Box (SJB), Smart Junction Box (SJB) harness is open or shorted, Smart Junction Box (SJB) 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 4,567

How popular is this code, among other codes? Low

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 Feb 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2A20 Description

The Instrument Cluster (IC) receives both the RUN/START and keep alive voltage from the Smart Junction Box (SJB). The Diagnostic Trouble Code (DTC) sets in the IC if the ignition START message sent from the SJB is stuck in the START position for greater than 15 seconds.

OBDII Code B2A20 - Ignition Stuck in Start - AutoCodes.com — B2A20 Code - Ignition Stuck in Start

What does this mean?

What are the Possible Causes of the DTC B2A20?

Faulty Smart Junction Box (SJB)
Smart Junction Box (SJB) harness is open or shorted
Smart Junction Box (SJB) circuit poor electrical connection
Faulty Instrument Cluster (IC)

How to Fix the DTC B2A20?

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 B2A20 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 B2A20 code?

Need more information on how to fix the B2A20 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2A20 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2A20 Ford — Ignition Stuck in Start
B2A20 Lincoln — Ignition Stuck in Start
B2A20 Mercury — Ignition Stuck in Start

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 B2A20 Code

1. What are the common symptoms of OBDII code B2A20 - Ignition Stuck in Start?

- The common symptoms include the engine continually cranking without starting, the key getting stuck in the ignition, and the engine not turning off when the key is in the off position.

2. What are the possible causes of OBDII code B2A20 - Ignition Stuck in Start?

- The possible causes can be a faulty ignition switch, a malfunctioning starter motor, a problem with the key cylinder, or issues with the electrical system.

3. How can I diagnose the issue related to OBDII code B2A20 - Ignition Stuck in Start?

- Diagnosis can involve checking the ignition switch for proper operation, inspecting the starter motor, examining the key cylinder, and testing the electrical connections for any faults.

4. Can a DIYer repair OBDII code B2A20 - Ignition Stuck in Start?

- Depending on the cause, some DIY repairs may be possible such as replacing the ignition switch or starter motor. However, complex electrical issues may require professional assistance.

5. What are some tips for repairing OBDII code B2A20 - Ignition Stuck in Start?

- Tips include ensuring the battery is fully charged, checking for blown fuses, inspecting the ignition wiring for damage, and ensuring all connections are secure and free of corrosion.

6. Is it safe to drive with OBDII code B2A20 - Ignition Stuck in Start?

- It is not safe to drive with this issue as it can lead to further damage to the vehicle and pose a safety risk. It is recommended to address the problem promptly.

7. Can OBDII code B2A20 - Ignition Stuck in Start be reset without repairs?

- Resetting the code may temporarily resolve the issue, but if the underlying problem is not fixed, it is likely to reoccur. It is best to diagnose and repair the root cause.

8. How much does it cost to repair OBDII code B2A20 - Ignition Stuck in Start?

- The cost of repair can vary depending on the cause of the issue, parts needed, and labor costs. It is advisable to get a diagnosis from a mechanic to determine the exact cost.

9. Will OBDII code B2A20 - Ignition Stuck in Start affect the vehicle's performance?

- Yes, this issue can affect the vehicle's performance by preventing it from starting or turning off properly. It can also drain the battery if left unresolved.

10. Can extreme weather conditions trigger OBDII code B2A20 - Ignition Stuck in Start?

- Extreme weather conditions like extreme cold or heat can exacerbate existing issues with the ignition system, potentially leading to the code being triggered.