AutoCodes – Generic – P0655

P0655 Code - Engine Hot Lamp Output Control Circuit Malfunction

Quick Answer

The Engine Control Module (ECM) monitors the Engine Hot Lamp Output Control Circuit. Common causes include Faulty Engine Hot Lamp, Engine Hot Lamp harness is open or shorted, Engine Hot Lamp 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: P0655 indicates Engine Hot Lamp Output Control Circuit Malfunction.
Common causes: Common causes include Faulty Engine Hot Lamp, Engine Hot Lamp harness is open or shorted, Engine Hot Lamp 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 13,515

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 17, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0655 Description

The Engine Control Module (ECM) monitors the Engine Hot Lamp Output Control Circuit. The ECM sets the OBDII code when the Engine Hot Lamp Output Control Circuit is not to factory specifications.

OBDII Code P0655 - Engine Hot Lamp Output Control Circuit Malfunction - AutoCodes.com — P0655 Code - Engine Hot Lamp Output Control Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0655?

Faulty Engine Hot Lamp
Engine Hot Lamp harness is open or shorted
Engine Hot Lamp circuit poor electrical connection

How to Fix the DTC P0655?

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 P0655 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 P0655 code?

Need more information on how to fix the P0655 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P0655 Mercedes-Benz — Engine Hot Lamp Output Control Circuit Malfunction

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.