AutoCodes – Ford – P0603 2002 Ford F150

P0603 2002 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 2002 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 3,767

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 2002 Ford F150 Description

OBDII Code P0603 2002 Ford F150 - Powertrain Control Module KAM Test Error - AutoCodes.com — P0603 2002 Ford F150 Code - Powertrain Control Module KAM Test Error

What does this mean?

What are the Possible Causes of the DTC P0603 2002 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 2002 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 2002 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 2002 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 2002 Ford F150 Code

1. What does the OBDII code P0603 mean on a 2002 Ford F150?

The P0603 code indicates a Powertrain Control Module Keep Alive Memory (KAM) Test Error.

2. What are the common symptoms of a P0603 code on a 2002 Ford F150?

Common symptoms include illuminated Check Engine Light, poor engine performance, stalling, and difficulty starting the vehicle.

3. What are possible causes of a P0603 code on a 2002 Ford F150?

Possible causes include a faulty Powertrain Control Module (PCM), damaged wiring or connectors, low battery voltage, or a software issue.

4. How can I diagnose a P0603 code on my 2002 Ford F150?

Diagnosis typically involves using a scan tool to read the code and check for any other related codes. Additionally, checking the PCM connections and inspecting the wiring for damage is recommended.

5. Can I still drive my 2002 Ford F150 with a P0603 code?

While the vehicle may still be drivable with a P0603 code, it is recommended to address the issue promptly to prevent further damage to the engine or other components.

6. How can I repair a P0603 code on my 2002 Ford F150?

Repair options may include resetting the PCM, repairing damaged wiring or connectors, replacing the PCM, or updating the software/firmware.

7. Is it safe to clear a P0603 code on a 2002 Ford F150 without fixing the underlying issue?

Clearing the code without addressing the underlying issue may temporarily turn off the Check Engine Light, but the problem will likely reoccur if not properly repaired.

8. How much does it typically cost to fix a P0603 code on a 2002 Ford F150?

The cost of fixing a P0603 code can vary depending on the specific issue causing the error. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Can a DIY enthusiast fix a P0603 code on a 2002 Ford F150?

While some aspects of diagnosing and repairing a P0603 code can be tackled by a DIY enthusiast, dealing with the PCM or software issues may require specialized tools and expertise best left to a professional mechanic.

10. How often does a P0603 code occur in a 2002 Ford F150?

The occurrence of a P0603 code can vary depending on the vehicle's condition, maintenance history, and driving habits. Regular vehicle maintenance and prompt attention to Check Engine Light warnings can help prevent this code from appearing.