AutoCodes – Mercury – B1356 Mercury

B1356 Mercury Code - Ignition Run Circuit Open

Quick Answer

The Ignition Switch RUN circuit provides greater than 10 volts through the circuits to the Smart Junction Box (SJB) when the key is in the RUN position. 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: B1356 Mercury indicates Ignition Run Circuit Open.
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 860

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 Mar 15, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1356 Mercury Description

The Ignition Switch RUN circuit provides greater than 10 volts through the circuits to the Smart Junction Box (SJB) when the key is in the RUN position. The OBDII sets when the Ignition Switch signal is not factory specifications.

OBDII Code B1356 Mercury - Ignition Run Circuit Open - AutoCodes.com — B1356 Mercury Code - Ignition Run Circuit Open

What does this mean?

What are the Possible Causes of the DTC B1356 Mercury?

Faulty Ignition Switch
Ignition Switch harness is open or shorted
Ignition Switch circuit poor electrical connection
Faulty Smart Junction Box (SJB)

How to Fix the DTC B1356 Mercury?

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 B1356 Mercury 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 B1356 Mercury code?

Need more information on how to fix the B1356 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1356 Mercury 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 B1356 Mercury Code

1. What are the common symptoms of OBDII code B1356 (Ignition Run Circuit Open) in a Mercury vehicle?

The common symptoms include issues with starting the vehicle, intermittent stalling, and difficulty keeping the engine running.

2. What are the possible causes of the OBDII code B1356 in a Mercury vehicle?

Possible causes of the B1356 code include a faulty ignition switch, damaged wiring in the ignition circuit, or a defective ignition run/start relay.

3. How can I diagnose the OBDII code B1356 in my Mercury vehicle?

Diagnosing the B1356 code usually involves inspecting the ignition switch, checking the wiring for any signs of damage, and testing the ignition run/start relay for proper functionality.

4. Can I still drive my Mercury vehicle with the OBDII code B1356 present?

It is not recommended to drive the vehicle with the B1356 code, as it can lead to potential safety hazards like stalling while driving. It is best to address the issue promptly.

5. How should I repair the OBDII code B1356 in my Mercury vehicle?

Repairing the B1356 code typically involves replacing the faulty ignition switch, repairing any damaged wiring, or replacing the defective ignition run/start relay.

6. Are there any DIY tips for fixing the OBDII code B1356 in my Mercury?

While it is possible to diagnose the issue yourself, repairing the B1356 code may require advanced automotive knowledge and tools. It is recommended to seek professional help for accurate repairs.

7. Will resetting the OBDII code B1356 in my Mercury make the issue go away?

Resetting the code may temporarily clear the error, but if the underlying issue causing the B1356 code is not addressed, it is likely to reappear. It is important to diagnose and repair the root cause of the problem.

8. Can a mechanic help me fix the OBDII code B1356 in my Mercury vehicle?

Yes, a qualified mechanic with experience in diagnosing and repairing OBDII codes can help you address the B1356 code in your Mercury effectively.

9. Is the OBDII code B1356 specific to Mercury vehicles only?

While the B1356 code is associated with Mercury vehicles, it may also be found in other vehicles using OBDII systems, as it pertains to the ignition run circuit open issue.

10. How can I prevent the OBDII code B1356 from occurring in my Mercury vehicle?

Regular maintenance checks, timely replacement of worn-out ignition components, and addressing any electrical issues promptly can help prevent the occurrence of the B1356 code in your Mercury vehicle.