AutoCodes – Generic – P0600

P0600 Code - Loss Of Serial Communication Link

Quick Answer

This Diagnostic Trouble Code (DTC) relates to a communication error between modules. Common causes include Low battery voltage, Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted. 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: P0600 indicates Loss Of Serial Communication Link.
Common causes: Common causes include Low battery voltage, Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted.
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 54,246

How popular is this code, among other codes? Medium

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 Mar 17, 2021

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0600 Description

This Diagnostic Trouble Code (DTC) relates to a communication error between modules. The Engine Control Module (ECM) sets the DTC when is unable to communicate with other control modules through the Serial Communication Link.

OBDII Code P0600 - Loss Of Serial Communication Link - AutoCodes.com — P0600 Code - Loss Of Serial Communication Link

What does this mean?

What are the Possible Causes of the DTC P0600?

Low battery voltage
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 P0600?

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 P0600 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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Information for Specific Makes

P0600 Acura — Powertrain Control Module Serial Communication
P0600 Chrysler — Powertrain Control Module Fault
P0600 Dodge — Powertrain Control Module Fault
P0600 Ford — Loss of Serial Communication Link
P0600 Honda — Serial Communication Link Malfunction
P0600 Hyundai — Serial Communication Link Malfunction
P0600 Infiniti — A/T Control Serial Communication Link Malfunction
P0600 Jeep — Powertrain Control Module Fault
P0600 KIA — CAN Communication Bus
P0600 Lincoln — Loss of Serial Communication Link
P0600 Mazda — Communication Line Error
P0600 Mercedes-Benz — Loss of Serial Communication Link
P0600 Mercury — Loss of Serial Communication Link
P0600 Mitsubishi — Serial Communication Link
P0600 Nissan — A/T Control Serial Communication Link Malfunction
P0600 Subaru — Serial Communication Link
P0600 Volkswagen — Serial Communication Link
P0600 Volvo — Loss Of Serial Communication Link

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.