AutoCodes – Mazda – P1342 Mazda

P1342 Mazda Code - PCM Malfunction

Quick Answer

P1342 Mazda indicates PCM Malfunction. Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module 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: P1342 Mazda indicates PCM Malfunction.
Common causes: Common causes include Faulty Powertrain Control Module (PCM), Powertrain Control Module harness is open or shorted, Powertrain Control Module 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 4,712

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 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1342 Mazda Description

OBDII Code P1342 Mazda - PCM Malfunction - AutoCodes.com — P1342 Mazda Code - PCM Malfunction

What does this mean?

What are the Possible Causes of the DTC P1342 Mazda?

Faulty Powertrain Control Module (PCM)
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection
Dead (Weak) battery

How to Fix the DTC P1342 Mazda?

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 P1342 Mazda 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 P1342 Mazda code?

Need more information on how to fix the P1342 Mazda code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P1342 Mazda Code

1. What does the OBDII code P1342 mean on a Mazda?

P1342 indicates a PCM (Powertrain Control Module) malfunction, suggesting an issue with the vehicleâ€™s main computer.

2. What are the common symptoms of a P1342 code on a Mazda?

Symptoms may include engine misfires, stalling, reduced performance, difficulty starting, and the check engine light being illuminated.

3. What causes a P1342 code on a Mazda?

Common causes include faulty PCM hardware, software corruption, electrical issues such as damaged wiring or connectors, or a failed PCM.

4. How can I diagnose the P1342 code on my Mazda?

Start by inspecting the PCM and its wiring for physical damage, checking for electrical continuity, and scanning for related codes that might provide additional context.

5. Can a P1342 code on a Mazda be fixed without replacing the PCM?

In some cases, the issue may be resolved by repairing damaged wires, replacing corroded connectors, or updating the PCM software.

6. Is it safe to drive a Mazda with the P1342 code?

Driving with this code is not recommended as it may lead to engine performance issues or further damage to the vehicle.

7. How much does it cost to repair a P1342 code on a Mazda?

Repair costs vary depending on the cause; PCM replacement can range from $500 to $1,500, while wiring or connector repairs may be less expensive.

8. Can I reset the P1342 code on my Mazda without fixing the problem?

Resetting the code may temporarily clear the check engine light, but the underlying issue will persist and likely cause the code to return.

9. How do I prevent the P1342 code from appearing on my Mazda?

Regular maintenance, including inspecting wiring and connectors, updating PCM software, and avoiding moisture exposure, can reduce the likelihood of this code.

10. Do I need a professional mechanic to fix the P1342 code on my Mazda?

While some basic inspections can be done at home, diagnosing and repairing PCM-related issues often requires specialized tools and expertise, making professional assistance advisable.