AutoCodes – Generic – B1595

B1595 Code - Ignition Switch Illegal Input Code

Quick Answer

The Body Control Module (BCM) monitors the Ignition Switch. Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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: B1595 indicates Ignition Switch Illegal Input Code.
Common causes: Common causes include Faulty Ignition Switch, Ignition Switch harness is open or shorted, Ignition Switch 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 9,985

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 May 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1595 Description

The Body Control Module (BCM) monitors the Ignition Switch. The BCM sets the OBDII code when the Ignition Switch is not to factory specifications.

OBDII Code B1595 - Ignition Switch Illegal Input Code - AutoCodes.com — B1595 Code - Ignition Switch Illegal Input Code

What does this mean?

What are the Possible Causes of the DTC B1595?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B1595?

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 B1595 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 B1595 code?

Need more information on how to fix the B1595 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1595 code diagnosed by a professional: Find a repair shop in your area

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 B1595 Code

1. What are the common symptoms of OBDII code B1595 (Ignition Switch Illegal Input Code)?

- Common symptoms include the engine not starting, intermittent stalling, and the inability to turn the key in the ignition.

2. What are the possible causes of OBDII code B1595?

- The possible causes of this code include a faulty ignition switch, issues with the key fob or key transponder, or a wiring problem in the ignition system.

3. How can I diagnose OBDII code B1595?

- Diagnosing this code typically involves using a scan tool to read the code, checking the ignition switch for proper operation, and inspecting the key fob or transponder for any issues.

4. Can I still drive my vehicle with OBDII code B1595 present?

- It is not recommended to drive your vehicle with this code present, as it can lead to potential safety issues if the engine stalls unexpectedly while driving.

5. How can I repair OBDII code B1595?

- Repairing this code may involve replacing the faulty ignition switch, reprogramming the key fob or transponder, or repairing any wiring issues in the ignition system.

6. Is it possible to reset OBDII code B1595 without fixing the underlying issue?

- While you can clear the code with a scan tool, it is important to address the underlying issue causing the code to prevent it from recurring.

7. Can a DIY enthusiast fix OBDII code B1595 at home?

- Depending on the underlying cause, some DIY enthusiasts may be able to fix this code at home by following repair guides and using the necessary tools.

8. How long does it typically take to repair OBDII code B1595?

- The repair time for this code can vary depending on the cause and the complexity of the repair, but it may take anywhere from a few hours to a full day.

9. Are there any preventive measures to avoid OBDII code B1595 in the future?

- Regular maintenance of the ignition system, key fob, and key transponder can help prevent issues that may trigger this code in the future.

10. Can OBDII code B1595 be a sign of other underlying issues in the vehicle?

- While this code is specific to the ignition switch input, it is possible for it to be related to other electrical or sensor issues in the vehicle that may need to be addressed.