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Engine-Codes – Mercury – B1359 Mercury

B1359 Mercury Code - Ignition Run/Acc Circuit Failure

Quick Answer

The B1359 diagnostic trouble code (DTC) for Mercury vehicles indicates an Ignition Run/Acc Circuit Failure. Common causes include Faulty ignition switch, Damaged wiring or connectors in the ignition run/acc circuit, Malfunctioning ignition relay. 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
B1359 Mercury indicates Ignition Run/Acc Circuit Failure.
Common causes
Common causes include Faulty ignition switch, Damaged wiring or connectors in the ignition run/acc circuit, Malfunctioning ignition relay.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B1359 Mercury Description

The B1359 diagnostic trouble code (DTC) for Mercury vehicles indicates an Ignition Run/Acc Circuit Failure. This code is typically triggered when the Powertrain Control Module (PCM) detects a malfunction in the circuit responsible for powering the ignition system in the vehicle. The ignition run/acc circuit is crucial for starting the engine and maintaining power to various electrical components while the vehicle is running. When this circuit fails, it can lead to issues with starting the vehicle, loss of power to essential systems, and potential safety hazards.

OBDII Code B1359 Mercury - Ignition Run/Acc Circuit Failure
B1359 Mercury Code - Ignition Run/Acc Circuit Failure

Common Causes of B1359 Mercury

  1. Faulty ignition switch
  2. Damaged wiring or connectors in the ignition run/acc circuit
  3. Malfunctioning ignition relay
  4. Defective PCM

Symptoms of B1359 Mercury

  1. Difficulty starting the engine
  2. Engine stalling while driving
  3. Intermittent loss of power to electrical components
  4. Engine not starting at all

How to Fix B1359 Mercury

  1. Perform a thorough inspection of the ignition switch, wiring, and connectors to identify any visible damage or loose connections.
  2. Test the ignition relay to determine if it is functioning correctly. Replace if necessary.
  3. Check the PCM for any signs of malfunction and reprogram or replace as needed.
  4. Clear the DTC from the PCM memory using a diagnostic scan tool.
  5. Test the vehicle to ensure the issue has been resolved and that the ignition run/acc circuit is functioning properly.

Cost to Fix B1359 Mercury

The typical repair costs for addressing an Ignition Run/Acc Circuit Failure (B1359) can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. On average, the repair costs for this type of problem can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate based on your specific circumstances.

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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 B1359 Mercury Code

1. What are the common symptoms of OBDII code B1359 (Mercury) related to Ignition Run/Acc Circuit Failure?

The common symptoms include difficulty starting the vehicle, intermittent stalling, and the inability to turn off the ignition.

2. What are the possible causes of OBDII code B1359 (Mercury)?

Possible causes of this code include a faulty ignition switch, damaged wiring in the ignition circuit, or a malfunctioning ignition relay.

3. How can I diagnose the Ignition Run/Acc Circuit Failure related to code B1359 on my Mercury?

To diagnose the issue, you can perform a visual inspection of the ignition components, test the ignition switch and related circuits with a multimeter, and check for any loose or damaged wiring.

4. Can I still drive my Mercury with OBDII code B1359 (Ignition Run/Acc Circuit Failure)?

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

5. How can I repair OBDII code B1359 (Mercury) related to Ignition Run/Acc Circuit Failure?

Repair options include replacing the faulty ignition switch, repairing damaged wiring, or replacing the malfunctioning ignition relay. It is recommended to consult a professional mechanic for proper diagnosis and repair.

6. Will resetting the OBDII code B1359 (Mercury) make the issue go away?

Resetting the code may temporarily clear the Check Engine light, but it will not solve the underlying issue causing the Ignition Run/Acc Circuit Failure. It is crucial to address the root cause of the problem.

7. How much does it cost to repair OBDII code B1359 (Mercury)?

The cost of repairing this code can vary depending on the specific issue causing the Ignition Run/Acc Circuit Failure. It is advisable to get a diagnostic from a mechanic to determine the exact repair cost.

8. Are there any preventive measures to avoid OBDII code B1359 (Mercury)?

Regular maintenance of the ignition system, including checking for loose connections and worn out components, can help prevent issues leading to code B1359 related to Ignition Run/Acc Circuit Failure.

9. Can a DIY enthusiast fix OBDII code B1359 (Mercury) themselves?

While basic troubleshooting like checking for loose connections can be done by a DIY enthusiast, diagnosing and repairing complex issues related to this code may require professional expertise to ensure proper resolution.

10. How urgent is it to address OBDII code B1359 (Mercury) Ignition Run/Acc Circuit Failure?

It is recommended to address this code promptly to avoid potential safety risks associated with ignition system failure, such as stalling while driving or being unable to turn off the vehicle.

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