AutoCodes – Hyundai – P1604 Hyundai

P1604 Hyundai Code - No ID From ECU

Quick Answer

The Transmission Control Module (TCM) can either receive data from the Engine Control Module (ECM) or ABS control module, or it can send data to the ECM and ABSCM by using CAN communication. Common causes include Open or Short in CAN communication harness, Faulty Transmission Control Module (TCM), 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: P1604 Hyundai indicates No ID From ECU.
Common causes: Common causes include Open or Short in CAN communication harness, Faulty Transmission Control Module (TCM), 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 11,364

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 21, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1604 Hyundai Description

OBDII Code P1604 Hyundai - No ID From ECU - AutoCodes.com — P1604 Hyundai Code - No ID From ECU

What does this mean?

What are the Possible Causes of the DTC P1604 Hyundai?

Open or Short in CAN communication harness
Faulty Transmission Control Module (TCM)
Faulty Engine Control Module (ECM)

How to Fix the DTC P1604 Hyundai?

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 P1604 Hyundai 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 P1604 Hyundai code?

Need more information on how to fix the P1604 Hyundai code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1604 Hyundai 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.