AutoCodes – Generic – B1558

B1558 Code - Ignition Run/Start Circuit Short To Ground

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: B1558 indicates Ignition Run/Start Circuit Short To Ground.
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 7,537

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 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1558 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 B1558 - Ignition Run/Start Circuit Short To Ground - AutoCodes.com — B1558 Code - Ignition Run/Start Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1558?

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 B1558?

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 B1558 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 B1558 code?

Need more information on how to fix the B1558 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1558 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 B1558 Code

1. What are common symptoms of OBDII code B1558 (Ignition Run/Start Circuit Short To Ground)?

- Common symptoms include difficulty starting the vehicle, engine stalling, or the engine not turning over at all.

2. What can cause the OBDII code B1558 to trigger?

- This code is typically triggered by a short circuit between the ignition run/start circuit and ground in the vehicle's electrical system.

3. How serious is the OBDII code B1558 (Ignition Run/Start Circuit Short To Ground)?

- This code should be addressed promptly as it can prevent the vehicle from starting or cause unexpected engine stalling, impacting the vehicle's drivability and safety.

4. How can I diagnose the issue causing OBDII code B1558?

- A thorough inspection of the ignition run/start circuit, including checking for any damaged wiring, loose connections, or faulty components, is necessary to diagnose the problem.

5. Are there any DIY repair tips for fixing OBDII code B1558?

- DIY repairs for this code may involve locating and repairing the short circuit, checking and fixing any damaged wires, and ensuring all connections are secure.

6. Can OBDII code B1558 be temporarily cleared to see if it returns?

- Yes, you can clear the code using an OBDII scanner to see if it returns after the vehicle is operated. However, it is important to address the underlying issue causing the code to prevent future problems.

7. Is it safe to continue driving with OBDII code B1558 present?

- It is not recommended to drive the vehicle with this code active, as it can lead to unpredictable engine behavior and potential safety hazards on the road.

8. How much does it typically cost to repair OBDII code B1558?

- The cost of repairing this code can vary depending on the extent of the issue, but it may involve labor costs for diagnosis and repair, as well as potential expenses for replacing damaged components.

9. Can extreme weather conditions affect the likelihood of OBDII code B1558 occurring?

- Yes, extreme weather conditions can sometimes exacerbate electrical issues in a vehicle, potentially increasing the likelihood of a short circuit triggering OBDII code B1558.

10. Are there any preventative measures to avoid OBDII code B1558 in the future?

- Regularly inspecting the vehicle's electrical system, ensuring proper maintenance, and addressing any wiring issues promptly can help prevent the occurrence of OBDII code B1558.