P0604 BMW Code - ECM Self Check Fault
Quick Answer
The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. 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
- P0604 BMW indicates ECM Self Check Fault.
- 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 P0604 BMW Description
What are the Possible Causes of the DTC P0604 BMW?
- 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 P0604 BMW?
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 P0604 BMW 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 P0604 BMW Code
1. What is OBDII code P0604 in a BMW, and what does it mean?
- OBDII code P0604 in a BMW indicates an ECM self-check fault. It means there is a problem with the Engine Control Module's internal self-test or memory.
2. What are the common symptoms of OBDII code P0604 in a BMW?
- Common symptoms of P0604 in a BMW include the engine stalling, rough idling, poor fuel efficiency, and issues with acceleration.
3. What are the possible causes of OBDII code P0604 in a BMW?
- The possible causes of OBDII code P0604 in a BMW can include a faulty ECM, damaged wiring or connectors, software issues, or a weak battery.
4. How can I diagnose OBDII code P0604 in my BMW?
- Diagnosing P0604 involves using an OBDII scanner to retrieve the code, checking for other related fault codes, inspecting wiring and connectors, and testing the ECM's functionality.
5. Can I still drive my BMW with OBDII code P0604?
- It is not recommended to drive your BMW with OBDII code P0604, as it can lead to further damage to the engine or other components. It's best to address the issue promptly.
6. How can OBDII code P0604 in a BMW be repaired?
- Repairing P0604 in a BMW typically involves replacing the faulty ECM, repairing or replacing damaged wiring/connectors, updating software, and ensuring the battery is in good condition.
7. Is it possible to reset OBDII code P0604 in a BMW without repairs?
- While you can clear the trouble code using an OBDII scanner, the underlying issue causing P0604 will persist. It's essential to address the root cause through proper repairs.
8. How much does it cost to fix OBDII code P0604 in a BMW?
- The cost of fixing P0604 in a BMW can vary depending on the specific issue. It may range from a few hundred to over a thousand dollars, including parts and labor.
9. Can a DIY enthusiast repair OBDII code P0604 in a BMW?
- Repairing P0604 in a BMW may require specialized tools and knowledge, so it's recommended to consult a professional mechanic. DIY enthusiasts with advanced skills may attempt the repair.
10. How can I prevent OBDII code P0604 from occurring in my BMW?
- To prevent OBDII code P0604 in your BMW, ensure regular maintenance, keep the battery in good condition, avoid electrical system overloads, and address any issues promptly to prevent ECM damage.
Discuss the causes and fixes for P0604 BMW OBDII Code
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IT showed before I do service and I have change Air filtter oil filtter and oil.so it went on and off.
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