AutoCodes – Ford – P0603 1999 Ford F150

P0603 1999 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 1999 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 3,363

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 1999 Ford F150 Description

OBDII Code P0603 1999 Ford F150 - Powertrain Control Module KAM Test Error - AutoCodes.com — P0603 1999 Ford F150 Code - Powertrain Control Module KAM Test Error

What does this mean?

What are the Possible Causes of the DTC P0603 1999 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 1999 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 1999 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 1999 Ford F150 code?

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Need Help with the 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 1999 Ford F150 Code

1. What is OBDII code P0603 for a 1999 Ford F150?

- OBDII code P0603 on a 1999 Ford F150 indicates a Powertrain Control Module Keep Alive Memory (KAM) Test Error.

2. What are common symptoms of OBDII code P0603 on a 1999 Ford F150?

- Common symptoms of P0603 may include engine stalling, rough idle, poor acceleration, and illuminated Check Engine Light.

3. What causes the Powertrain Control Module KAM Test Error on a 1999 Ford F150?

- The P0603 code on a 1999 Ford F150 can be caused by a faulty Powertrain Control Module (PCM), wiring issues, or a drained vehicle battery.

4. How is OBDII code P0603 diagnosed on a 1999 Ford F150?

- Diagnosis of P0603 involves using an OBDII scanner to read the code, checking the vehicle's battery voltage, and inspecting the PCM and related wiring for any visible damage.

5. Can OBDII code P0603 on a 1999 Ford F150 be fixed at home?

- Depending on the underlying cause, fixing P0603 may require professional diagnosis and repair. However, if the issue is related to a weak vehicle battery, replacing the battery could potentially resolve the error.

6. Is it safe to drive a 1999 Ford F150 with the Powertrain Control Module KAM Test Error?

- It is generally not recommended to drive a vehicle with an active P0603 code, as it can lead to drivability issues or potential damage to the engine components.

7. How much does it cost to repair OBDII code P0603 on a 1999 Ford F150?

- The cost of repairing P0603 on a 1999 Ford F150 can vary depending on the cause of the issue and labor rates. It is advisable to get a professional diagnosis to determine the exact cost.

8. Can resetting the PCM clear the P0603 code on a 1999 Ford F150?

- Resetting the Powertrain Control Module (PCM) may temporarily clear the P0603 code, but if the underlying issue is not fixed, the code is likely to reappear.

9. Will disconnecting the battery reset the P0603 code on a 1999 Ford F150?

- Disconnecting the battery may reset the PCM and clear the code temporarily, but it is not a permanent solution. It is important to diagnose and fix the root cause of the error.

10. How long does it take to repair OBDII code P0603 on a 1999 Ford F150?

- The repair time for P0603 on a 1999 Ford F150 can vary based on the specific issue causing the code. Simple fixes like battery replacement may take less time, while more complex problems could require more extensive repairs.