P0603 2001 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 2001 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.
Code P0603 2001 Ford F150 Description
What are the Possible Causes of the DTC P0603 2001 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 2001 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.
Code Tech Notes
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 2001 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.
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Frequently Asked Questions about P0603 2001 Ford F150 Code
What does the OBDII code P0603 mean on a 2001 Ford F150?
P0603 indicates a "Powertrain Control Module (PCM) Keep-Alive Memory (KAM) Test Error," meaning the PCM is having trouble retaining stored data when the vehicle is off.
What are the symptoms of a P0603 code on a 2001 Ford F150?
Symptoms may include an illuminated check engine light, erratic transmission shifting, poor fuel economy, or difficulty starting the engine.
What causes the P0603 code on a 2001 Ford F150?
Common causes include a weak or disconnected battery, faulty PCM, broken KAM power circuit wiring, or a recent battery replacement or disconnection.
Can a dead battery trigger the P0603 code?
Yes, a weak or dead battery can interrupt the PCM's ability to retain memory, which may trigger the P0603 code.
How can I fix the P0603 code on my 2001 Ford F150?
Start by checking the battery and charging system, ensuring all connections are secure. Inspect the KAM power circuit wiring for damage and reset the code to see if it recurs.
Do I need to replace the PCM if I get a P0603 code?
Not necessarily. The PCM may not be faulty, as the issue could be related to the battery, wiring, or temporary disconnection. Diagnose other components first.
Can a recent battery replacement cause a P0603 code?
Yes, disconnecting or replacing the battery can clear the KAM and temporarily trigger the code until the PCM relearns data.
Is it safe to drive with a P0603 code on my 2001 Ford F150?
Generally, it is safe to drive. However, you may experience performance issues like poor fuel economy or erratic shifting, so addressing the issue is recommended.
How do I reset the P0603 code on my Ford F150?
You can reset the code by using an OBDII scanner or disconnecting the battery for a few minutes. However, ensure the underlying issue is resolved to prevent the code from returning.
What tools do I need to diagnose a P0603 code?
A multimeter to check wiring and voltage, and an OBDII scanner to read and clear codes, are essential tools for diagnosing this issue.
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