P0603 Acura Code - ECM Internal Keep Alive Memory 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, 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 Acura indicates ECM Internal Keep Alive Memory Error.
- Common causes
- Common causes include Loose or poor battery terminal connection, Low battery charge, 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 Acura Description
What are the Possible Causes of the DTC P0603 Acura?
- Loose or poor battery terminal connection
- Low battery charge
- ECM power supply circuit is open or shorted
- ECM Programing
- Faulty ECM
How to Fix the DTC P0603 Acura?
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 Acura 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 Acura Code
1. What does the OBDII code P0603 mean on an Acura?
The P0603 code indicates an ECM Internal Keep Alive Memory Error, meaning the Engine Control Module (ECM) is having trouble retaining memory when the vehicle is off.
2. What are common symptoms of the P0603 code in an Acura?
Symptoms may include difficulty starting the vehicle, erratic engine performance, stalling, or no noticeable issues in some cases.
3. What causes the P0603 code on an Acura?
Common causes include a weak or disconnected battery, damaged wiring or connectors to the ECM, or a malfunctioning ECM itself.
4. Can a weak battery trigger the P0603 code?
Yes, a weak or failing battery can cause insufficient power to the ECM, leading to memory retention errors.
5. How do I diagnose the P0603 code on my Acura?
Check the battery and electrical connections, inspect ECM wiring for damage, and perform a diagnostic scan to ensure no additional related codes are present.
6. Can I drive my Acura with the P0603 code?
In many cases, you can drive with this code, but ignoring it may lead to performance issues or further damage over time.
7. How do I fix the P0603 code on an Acura?
Repair may involve replacing or reconnecting the battery, fixing damaged wiring, or reprogramming or replacing the ECM if necessary.
8. Does the P0603 code always mean the ECM is faulty?
No, the code can be caused by external factors like power issues or wiring problems, so the ECM may not need replacement.
9. How much does it cost to repair the P0603 code on an Acura?
Costs vary depending on the cause, ranging from a simple battery replacement ($100-$200) to ECM replacement ($500-$1200).
10. Can resetting the ECM clear the P0603 code on my Acura?
Resetting the ECM may temporarily clear the code, but the underlying issue must be addressed to prevent its return.
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