P0603 2017 GMC Sierra Code - Control Module Long Term Memory Reset
Quick Answer
The P0603 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Engine Control Module (ECM) has detected a long-term memory reset. Common causes include Faulty ECM, Power interruption to the ECM, Software glitch. 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 2017 GMC Sierra indicates Control Module Long Term Memory Reset.
- Common causes
- Common causes include Faulty ECM, Power interruption to the ECM, Software glitch.
- 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 P0603 2017 GMC Sierra Description
The P0603 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates that the Engine Control Module (ECM) has detected a long-term memory reset. The ECM is a crucial component of the vehicle's onboard computer system, responsible for controlling various engine functions and ensuring optimal performance. When the ECM's long-term memory is reset, it can lead to a loss of important data and settings that are necessary for the proper operation of the vehicle.
Common Causes of P0603 2017 GMC Sierra
- Faulty ECM
- Power interruption to the ECM
- Software glitch
- Wiring problem
- Battery issues
Symptoms of P0603 2017 GMC Sierra
- Poor fuel efficiency
- Rough idling
- Stalling
- Difficulty starting the engine
- Illumination of the check engine light
How to Fix P0603 2017 GMC Sierra
- Perform a thorough diagnostic scan to confirm the P0603 code and identify the specific cause.
- Check the battery and electrical connections to ensure there are no power interruptions.
- Inspect the ECM for any signs of damage or malfunction and replace if necessary.
- Update the ECM software to the latest version to address any potential glitches.
- Test drive the vehicle to verify that the issue has been resolved and clear the DTC from the ECM.
Cost to Fix P0603 2017 GMC Sierra
The typical repair costs for addressing a P0603 code on a 2017 GMC Sierra can range from $200 to $500, including parts and labor. However, it is essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Auto repair shops commonly charge between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships and lower at independent shops. It is advisable to check local rates for a more precise estimate.
Tech Notes for P0603 2017 GMC Sierra
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Frequently Asked Questions about P0603 2017 GMC Sierra Code
1. What does the OBDII code P0603 mean on a 2017 GMC Sierra?
P0603 indicates an issue with the Control Module's Long Term Memory, meaning the module has experienced a reset or lost stored data.
2. What are the common symptoms of code P0603 in a 2017 GMC Sierra?
Symptoms may include an illuminated Check Engine Light, intermittent stalling, rough idling, or a decrease in fuel efficiency.
3. What causes the P0603 code to appear on a 2017 GMC Sierra?
Common causes include a weak or failing battery, loose or corroded battery connections, faulty powertrain control module (PCM), or improper aftermarket tuning.
4. Can a bad battery cause the P0603 code in my GMC Sierra?
Yes, a weak or failing battery that disrupts the voltage supply to the PCM can trigger this code.
5. How do I fix the P0603 code on my 2017 GMC Sierra?
Start by checking and cleaning the battery terminals, ensuring the battery is fully charged, and inspecting the wiring. If the problem persists, the PCM may need reprogramming or replacement.
6. Is it safe to drive my 2017 GMC Sierra with the P0603 code?
While the vehicle may still operate, driving with this code can lead to further issues like stalling or poor performance. It’s best to address the issue promptly.
7. Can aftermarket tuning cause the P0603 code in a GMC Sierra?
Yes, improper aftermarket tuning or modifications to the PCM can interfere with its memory and trigger this code.
8. How much does it cost to repair the P0603 code on a GMC Sierra?
Costs vary depending on the issue, but reprogramming the PCM typically ranges from $80 to $150, while PCM replacement can cost $500 or more, including labor.
9. Will disconnecting the battery clear the P0603 code on my 2017 GMC Sierra?
Disconnecting the battery may temporarily clear the code, but if the underlying issue persists, the code will return.
10. Do I need to replace the PCM to fix the P0603 code?
Not always. Start with simpler fixes like checking the battery and connections. Replace the PCM only if diagnostics confirm it’s faulty.
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