AutoCodes – Ford – P0603 2003 Ford F150

P0603 2003 Ford F150 Code - Powertrain Control Module KAM Test Error

Quick Answer

Battery voltage is supplied to the ECM even when the ignition switch is turned OFF for the ECM memory function of the DTC memory, the air-fuel ratio feedback compensation value memory, the idle air volume learning value memory, etc. Common causes include Loose or poor battery terminal connection, Low battery charge (Battery terminal corrosion), ECM power supply circuit 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: P0603 2003 Ford F150 indicates Powertrain Control Module KAM Test Error .
Common causes: Common causes include Loose or poor battery terminal connection, Low battery charge (Battery terminal corrosion), ECM power supply circuit 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 4,075

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 Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0603 2003 Ford F150 Description

OBDII Code P0603 2003 Ford F150 - Powertrain Control Module KAM Test Error - AutoCodes.com — P0603 2003 Ford F150 Code - Powertrain Control Module KAM Test Error

What does this mean?

What are the Possible Causes of the DTC P0603 2003 Ford F150?

Loose or poor battery terminal connection
Low battery charge (Battery terminal corrosion)
ECM power supply circuit is open or shorted
ECM Programing
Faulty PCM

How to Fix the DTC P0603 2003 Ford F150?

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

Start by charging the vehicles battery and clean terminal, once the battery is charged and the terminals are clean and secure, erase code. If the code comes back ON you may have to reprogram or replaced ECM

Indicates the PCM has experienced an internal memory fault. However there are external items that can cause this DTC.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0603 2003 Ford F150 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 P0603 2003 Ford F150 code?

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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.

Frequently Asked Questions about P0603 2003 Ford F150 Code

What are the common symptoms of OBDII code P0603 on a 2003 Ford F150?

The common symptoms of OBDII code P0603 on a 2003 Ford F150 include check engine light illumination, problems with engine performance, and possible issues with the transmission shifting.

What does the OBDII code P0603 indicate on a 2003 Ford F150?

The OBDII code P0603 on a 2003 Ford F150 indicates a Powertrain Control Module Keep Alive Memory (KAM) test error. This means there is a malfunction in the PCM's ability to retain memory settings.

What are the possible causes of OBDII code P0603 on a 2003 Ford F150?

Possible causes of OBDII code P0603 on a 2003 Ford F150 include a faulty PCM, a wiring issue in the PCM circuit, low battery voltage, or a software malfunction in the PCM.

How can I diagnose OBDII code P0603 on a 2003 Ford F150?

Diagnosing OBDII code P0603 on a 2003 Ford F150 typically involves checking the PCM for any visible signs of damage, testing the PCM circuit for continuity, and verifying the battery voltage is within the correct range.

What are the repair options for OBDII code P0603 on a 2003 Ford F150?

Repair options for OBDII code P0603 on a 2003 Ford F150 may include replacing the PCM if it is determined to be faulty, repairing any damaged wiring in the PCM circuit, ensuring the battery voltage is adequate, or updating the PCM software.

Can I continue to drive my 2003 Ford F150 with OBDII code P0603?

It is not recommended to continue driving your 2003 Ford F150 with OBDII code P0603, as it could lead to further damage to the vehicle's engine or transmission. It is best to address the issue promptly.

How much does it cost to repair OBDII code P0603 on a 2003 Ford F150?

The cost to repair OBDII code P0603 on a 2003 Ford F150 can vary depending on the specific cause of the issue. Costs may include parts and labor for replacing the PCM, repairing wiring, or updating software.

Is OBDII code P0603 a common issue in 2003 Ford F150 vehicles?

OBDII code P0603 is not an extremely common issue in 2003 Ford F150 vehicles, but it can occur due to various factors such as age, wear and tear, or electrical issues. Regular maintenance and monitoring can help prevent such problems.

Should I reset the OBDII code P0603 on my 2003 Ford F150 after repairing it?

Yes, it is recommended to reset the OBDII code P0603 on your 2003 Ford F150 after repairing the underlying issue. This will clear the error code from the system and allow you to monitor the vehicle for any recurring problems.