AutoCodes – Mercedes-Benz – P0355 Mercedes-Benz

P0355 Mercedes-Benz Code - Ignition Coil 5 Primary/Secondary Circuit Malfunction

Quick Answer

The ignition system on the vehicle uses individual ignition coils for each cylinder. Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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: P0355 Mercedes-Benz indicates Ignition Coil 5 Primary/Secondary Circuit Malfunction.
Common causes: Common causes include Faulty Ignition Coil 5, Ignition Coil 5 harness is open or shorted, Ignition Coil 5 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 20,605

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0355 Mercedes-Benz Description

The ignition system on the vehicle uses individual ignition coils for each cylinder. The Engine Control Module (ECM) controls each ignition coil operation. The ECM sends a ON/OFF signal to energize the ignition coil to create a spark at the spark plug when a spark is required at the cylinder.

OBDII Code P0355 Mercedes-Benz - Ignition Coil 5 Primary/Secondary Circuit Malfunction - AutoCodes.com — P0355 Mercedes-Benz Code - Ignition Coil 5 Primary/Secondary Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0355 Mercedes-Benz?

Faulty Ignition Coil 5
Ignition Coil 5 harness is open or shorted
Ignition Coil 5 circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0355 Mercedes-Benz?

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 P0355 Mercedes-Benz 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 P0355 Mercedes-Benz code?

Need more information on how to fix the P0355 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0355 Mercedes-Benz 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 P0355 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0355 in a Mercedes-Benz?

- Common symptoms include engine misfires, rough idling, loss of power, and illuminated Check Engine Light.

2. What can cause the ignition coil 5 primary/secondary circuit malfunction in a Mercedes-Benz?

- Possible causes include a faulty ignition coil, damaged wiring or connectors, poor electrical connection, or a problem with the Engine Control Module (ECM).

3. How can I diagnose the issue related to OBDII code P0355 in my Mercedes-Benz?

- Diagnostic steps may include checking the ignition coil, inspecting the wiring and connectors, testing the coil's resistance, and scanning the ECM for fault codes.

4. Can driving with a P0355 fault code damage my Mercedes-Benz?

- Continuing to drive with this fault code can potentially lead to permanent damage to the catalytic converter, oxygen sensors, and other engine components.

5. What is the typical repair for the ignition coil 5 primary/secondary circuit malfunction in a Mercedes-Benz?

- The typical repair involves replacing the faulty ignition coil, repairing any damaged wiring or connectors, and clearing the fault code from the ECM.

6. Are there any preventive measures to avoid OBDII code P0355 in a Mercedes-Benz?

- Regular maintenance, such as timely spark plug replacement and periodic inspection of ignition components, can help prevent issues that may trigger this fault code.

7. Can a DIY enthusiast fix the ignition coil 5 primary/secondary circuit malfunction in a Mercedes-Benz?

- While some experienced DIYers may be able to replace an ignition coil, diagnosing and repairing electrical issues related to this fault code may require professional expertise.

8. How much does it typically cost to repair OBDII code P0355 in a Mercedes-Benz?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $150 to $400 for parts and labor at a dealership or repair shop.

9. Will resetting the fault code on my Mercedes-Benz make the issue go away temporarily?

- Resetting the fault code may temporarily turn off the Check Engine Light, but the underlying issue causing OBDII code P0355 will persist until properly diagnosed and repaired.

10. Is it safe to drive my Mercedes-Benz with a faulty ignition coil related to code P0355?

- It is not recommended to drive your vehicle with a faulty ignition coil, as it can lead to engine performance issues and potentially cause further damage to other components.