Engine-CodesMercury – P1357 Mercury

P1357 Mercury Code - Ignition Diagnostic Monitor Pulsewidth Not Defined

Quick Answer

The P1357 diagnostic trouble code for Mercury vehicles is related to the Ignition Diagnostic Monitor Pulsewidth not being defined. Common causes include Faulty ignition coil, Malfunctioning ignition control module, Wiring harness issues. 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
P1357 Mercury indicates Ignition Diagnostic Monitor Pulsewidth Not Defined.
Common causes
Common causes include Faulty ignition coil, Malfunctioning ignition control module, Wiring harness issues.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1357 Mercury Description

The P1357 diagnostic trouble code for Mercury vehicles is related to the Ignition Diagnostic Monitor Pulsewidth not being defined. This code indicates that there is an issue with the ignition system's diagnostic monitor, which is responsible for monitoring the pulsewidth of the ignition system. The pulsewidth refers to the amount of time the ignition coil is energized to produce a spark. When this pulsewidth is not defined or is out of range, it can lead to various performance issues in the vehicle.

OBDII Code P1357 Mercury - Ignition Diagnostic Monitor Pulsewidth Not Defined
P1357 Mercury Code - Ignition Diagnostic Monitor Pulsewidth Not Defined

Common Causes of P1357 Mercury

  1. Faulty ignition coil
  2. Malfunctioning ignition control module
  3. Wiring harness issues
  4. Problems with the PCM
  5. Poor electrical connections

Symptoms of P1357 Mercury

  1. Engine misfires
  2. Rough idling
  3. Poor acceleration
  4. Decreased fuel efficiency
  5. Engine stalling

How to Fix P1357 Mercury

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to retrieve the specific details of the problem.
  2. Inspect the ignition system components, including the ignition coil, control module, and wiring harness, for any signs of damage or wear.
  3. Test the ignition system components for proper functioning and replace any faulty parts as needed.
  4. Clear the diagnostic trouble codes and reset the PCM to see if the issue has been resolved.
  5. Conduct a road test to ensure that the symptoms associated with the code have been eliminated and that the vehicle is performing optimally.

Cost to Fix P1357 Mercury

The typical repair costs for addressing the P1357 code on a Mercury vehicle can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay between $150 to $500 for parts and labor. Keep in mind that the actual cost may be higher or lower based on the severity of the problem and the extent of repairs needed. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model.

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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.

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