AutoCodes – Chevrolet – P0603 2016 Chevrolet Silverado

P0603 2016 Chevrolet Silverado Code - Control Module Long Term Memory Reset

Quick Answer

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). Common causes include Low battery voltage, Reprogram Engine Control Module (ECM), Faulty Engine 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: P0603 2016 Chevrolet Silverado indicates Control Module Long Term Memory Reset.
Common causes: Common causes include Low battery voltage, Reprogram Engine Control Module (ECM), Faulty Engine 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 325

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 Mar 29, 2024

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0603 2016 Chevrolet Silverado Description

This diagnostic applies to internal microprocessor integrity conditions within the Engine Control Module (ECM). This diagnostic also addresses if the ECM is not programmed. The ECM monitors its ability to read and write to the memory. It also monitors a timing function. No external circuits are involved. The Diagnostic Trouble Code (DTC) will be set when the ECM detects an internal failure or incomplete programming for more than 10 s.

OBDII Code P0603 2016 Chevrolet Silverado - Control Module Long Term Memory Reset - AutoCodes.com — P0603 2016 Chevrolet Silverado Code - Control Module Long Term Memory Reset

What does this mean?

What are the Possible Causes of the DTC P0603 2016 Chevrolet Silverado?

Low battery voltage
Reprogram Engine Control Module (ECM)
Faulty Engine Control Module
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC P0603 2016 Chevrolet Silverado?

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 vehicle's battery and clean terminal, once the battery is charged and the terminals are clean and secured, erase the code. If the code comes back ON, then you may have to reprogram or replace Powertrain Control Module (PCM).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0603 2016 Chevrolet Silverado 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P0603 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0603 2016 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2016 Chevrolet Silverado Code

1. What does the OBDII code P0603 mean for a 2016 Chevrolet Silverado?

P0603 indicates an issue with the Control Module Long Term Memory Reset, meaning the ECM (Engine Control Module) has detected a problem with its ability to retain memory settings.

2. What are common symptoms of a P0603 code in a 2016 Chevrolet Silverado?

Symptoms may include the check engine light turning on, loss of power, poor fuel economy, difficulty starting, or erratic engine performance.

3. What causes the P0603 code on a 2016 Chevrolet Silverado?

Possible causes include a failing ECM, a weak or disconnected battery, poor electrical connections, faulty wiring, or aftermarket performance modifications.

4. Can a dead battery trigger the P0603 code on a 2016 Chevrolet Silverado?

Yes, a dead or weak battery, or a recent battery replacement, can cause the P0603 code because the ECM may lose its memory during power loss.

5. How serious is the P0603 code for a 2016 Chevrolet Silverado?

While not immediately critical, the code should be addressed promptly as it can lead to drivability issues and may indicate a failing ECM or electrical problem.

6. How can I fix a P0603 code on my 2016 Chevrolet Silverado?

Start by checking the battery and electrical connections, ensuring they are clean and secure. If the problem persists, further diagnosis of the ECM and wiring may be necessary.

7. Can aftermarket performance chips or tunes cause the P0603 code?

Yes, aftermarket modifications that alter the ECM's programming can trigger the P0603 code due to incompatibility or improper installation.

8. Do I need to replace the ECM if I get a P0603 code on my Silverado?

Not necessarily. The issue could be related to a battery, wiring, or software problem. Only replace the ECM after thorough diagnostics confirm it is faulty.

9. Can I drive my 2016 Chevrolet Silverado with a P0603 code?

While the vehicle may still be drivable, itâ€™s best to address the issue promptly to avoid potential drivability problems or further damage.

10. How can I prevent the P0603 code from returning?

Ensure the battery and electrical system are in good condition, avoid abrupt power losses, and use properly installed, compatible performance upgrades if applicable.