AutoCodes – Hyundai – P1630 Hyundai

P1630 Hyundai Code - CAN Communication BUS OFF

Quick Answer

Without Controller Area Network (CAN) communication, an independent pin and wiring are needed to receive sensor information from the Engine Control Module (ECM). Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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: P1630 Hyundai indicates CAN Communication BUS OFF.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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 11,875

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Dec 26, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1630 Hyundai Description

Without Controller Area Network (CAN) communication, an independent pin and wiring are needed to receive sensor information from the Engine Control Module (ECM). The more information to be communicated, the more wirings are required. In the case of CAN communication type, all the information needs to be communicated among control modules such as Transmission Control Module (TCM), ECM, and Transfer Case Control Module (TCCM) use CAN lines. Engine coolant temperature information is used for lock-up control. If the TCM detects BUS off signal in CPU, the DTC will be set.

OBDII Code P1630 Hyundai - CAN Communication BUS OFF - AutoCodes.com — P1630 Hyundai Code - CAN Communication BUS OFF

What does this mean?

What are the Possible Causes of the DTC P1630 Hyundai?

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

How to Fix the DTC P1630 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 P1630 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.

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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.