AutoCodes – Nissan – P0604 Nissan

P0604 Nissan Code - Engine Control Module Internal Random Access Memory Error

Quick Answer

The Diagnostic Trouble Code (DTC) will set when the Engine Control Module (ECM) detects a malfunction in the internal Random Access Memory (RAM) of the Engine Control Module. Common causes include Loose or poor battery terminal connection, Low battery charge, Faulty Engine Control Module (ECM). 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: P0604 Nissan indicates Engine Control Module Internal Random Access Memory Error.
Common causes: Common causes include Loose or poor battery terminal connection, Low battery charge, Faulty Engine Control Module (ECM).
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 7,482

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 Oct 02, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0604 Nissan Description

The Diagnostic Trouble Code (DTC) will set when the Engine Control Module (ECM) detects a malfunction in the internal Random Access Memory (RAM) of the Engine Control Module.

OBDII Code P0604 Nissan - Engine Control Module Internal Random Access Memory Error - AutoCodes.com — P0604 Nissan Code - Engine Control Module Internal Random Access Memory Error

What does this mean?

What are the Possible Causes of the DTC P0604 Nissan?

Loose or poor battery terminal connection
Low battery charge
Faulty Engine Control Module (ECM)
Engine Control Module power supply circuit is open or shorted
Engine Control Module Outdated Program

How to Fix the DTC P0604 Nissan?

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 does this mean?

Code Tech Notes

Start by charging the vehicles battery and clean terminal, once the battery is charged and the terminals are clean and secure, erase code. If the code comes back ON you may have to reprogram or replaced ECM

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0604 Nissan 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.

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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.