AutoCodes – Lincoln – P0605 Lincoln

P0605 Lincoln Code - Internal Control Module Read Only Memory Error

Quick Answer

The Powertrain Control Module (PCM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Powertrain Control Module (PCM) programming error, Physically damaged Powertrain Control Module, Faulty Powertrain Control Module. 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: P0605 Lincoln indicates Internal Control Module Read Only Memory Error.
Common causes: Common causes include Powertrain Control Module (PCM) programming error, Physically damaged Powertrain Control Module, Faulty Powertrain Control Module.
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 4,737

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 Jul 30, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0605 Lincoln Description

The Powertrain Control Module (PCM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the Powertrain Control Module is functioning properly. The Diagnostic Trouble Code (DTC) will set when the Powertrain Control Module Read Only Memory (ROM) has been corrupted.

OBDII Code P0605 Lincoln - Internal Control Module Read Only Memory Error - AutoCodes.com — P0605 Lincoln Code - Internal Control Module Read Only Memory Error

What does this mean?

What are the Possible Causes of the DTC P0605 Lincoln?

Powertrain Control Module (PCM) programming error
Physically damaged Powertrain Control Module
Faulty Powertrain Control Module
Powertrain Control Module harness is open or shorted
Powertrain Control Module circuit poor electrical connection

How to Fix the DTC P0605 Lincoln?

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

Try clearing the code before replacing any parts. Reprogram the Vehicle Identification (VID) block (use as built data). Check for other Diagnostic Trouble Code (DTC) or drive symptoms for further action. Make sure to check for aftermarket performance products before installing a new Powertrain Control Module (PCM).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0605 Lincoln 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.