P0603 2015 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 2015 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.
Code P0603 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0603 2015 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 2015 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0603 2015 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.
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Frequently Asked Questions about P0603 2015 Chevrolet Silverado Code
1. What does the OBDII code P0603 mean on a 2015 Chevrolet Silverado?
The P0603 code indicates that the Powertrain Control Module (PCM) has detected a loss of long-term memory, which stores adaptive information for fuel trims and engine performance.
2. What are the common symptoms of a P0603 code on a 2015 Silverado?
Symptoms may include an illuminated check engine light, rough idle, decreased fuel efficiency, or intermittent starting issues.
3. What causes the P0603 code in a 2015 Chevrolet Silverado?
Common causes include a weak or disconnected battery, faulty PCM, bad ground connections, or aftermarket performance tuners.
4. Can a low battery trigger the P0603 code on a 2015 Silverado?
Yes, a weak or failing battery can cause voltage fluctuations that lead to a memory reset in the PCM, triggering the P0603 code.
5. How do you fix the P0603 code on a 2015 Chevrolet Silverado?
Repairs may include checking and securing battery connections, inspecting ground wires, replacing the PCM if faulty, or removing aftermarket tuners.
6. Can the P0603 code be caused by an aftermarket tuner on a 2015 Silverado?
Yes, aftermarket tuners can interfere with the PCM’s memory and cause the P0603 code to appear.
7. Is it safe to drive a 2015 Chevrolet Silverado with the P0603 code?
While the truck may still be drivable, you could experience performance issues. It's best to address the issue promptly to avoid further complications.
8. How do you diagnose the P0603 code on a 2015 Silverado?
Start by checking the battery voltage, inspecting ground connections, and scanning for additional codes. If no faults are found, the PCM may need testing or replacement.
9. Does clearing the P0603 code reset the PCM on a 2015 Chevrolet Silverado?
Yes, clearing the code will reset the PCM temporarily, but if the underlying issue isn’t fixed, the code will likely return.
10. How much does it cost to fix the P0603 code on a 2015 Chevrolet Silverado?
Repair costs vary depending on the issue, ranging from $0 for a simple battery connection fix to $500 or more for a PCM replacement.
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