P0601 Code - Control Module Read Only Memory
Quick Answer
The nerve center of the fuel injection system is the Engine Control Module (ECM). Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit poor electrical connection. 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
- P0601 indicates Control Module Read Only Memory.
- Common causes
- Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit poor electrical connection.
- 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 P0601 Description
In order to house the program information and the calibrations required for engine, trans-axle diagnostics operation an electrically erasable programmable read-only memory (EEPROM) is used. For detecting errors in the software the ECM uses a specially devised value known as the checksum.
The checksum is a value that is the sum total of all the numbers in the software added together. If the values recorded by the ECM and the checksum do not match then a checksum error is highlighted.
What are the Possible Causes of the DTC P0601?
- Faulty Engine Control Module (ECM)
- Engine Control Module harness is open or shorted
- Engine Control Module circuit poor electrical connection
- Low battery voltage
How to Fix the DTC P0601?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0601 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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Information for Specific Makes
- P0601 BMW — ECM Self Check Fault
- P0601 Buick — Control Module Read Only Memory Performance
- P0601 Cadillac — Control Module Read Only Memory Performance
- P0601 Chevrolet — Control Module Read Only Memory Performance
- P0601 Chrysler — Power Control Module Internal Fault
- P0601 Dodge — Power Control Module Internal Fault
- P0601 GMC — Control Module Read Only Memory Performance
- P0601 Hummer — Power Control Module Internal Fault
- P0601 Isuzu — Internal Control Module Memory Check Sum Error
- P0601 Jeep — Power Control Module Internal Fault
- P0601 KIA — Internal Control Module Memory Check Sum Error
- P0601 Mazda — Internal Control Module Memory Check Sum Error
- P0601 Mercedes-Benz — Control Module Read Only Memory
- P0601 MINI — ECM Self Check Fault
- P0601 Pontiac — Power Control Module Internal Fault
- P0601 RAM — Power Control Module Internal Fault
- P0601 Saab — Control Module Read Only Memory
- P0601 Saturn — Power Control Module Internal Fault
- P0601 Toyota — Control Module Performance
- P0601 Volkswagen — Internal Control Module Memory Check Sum Error
Frequently Asked Questions about P0601 Code
1. What is OBDII code P0601?
- OBDII code P0601 refers to a Control Module Read Only Memory (ROM) error detected in the vehicle's engine control module (ECM).
2. What are the common symptoms of OBDII code P0601?
- Common symptoms include the check engine light being illuminated, engine performance issues, stalling, and difficulties starting the vehicle.
3. What are some possible causes of OBDII code P0601?
- The code can be triggered by a faulty ECM, a corrupted or damaged ECM software, low voltage to the ECM, or wiring issues.
4. How is OBDII code P0601 diagnosed?
- The code is diagnosed using a professional OBDII scanner to retrieve the specific error code and further testing to identify the root cause of the issue.
5. Can OBDII code P0601 be repaired?
- Repairing the issue involves addressing the root cause, which may include reprogramming the ECM, replacing the ECM, checking and repairing wiring issues, or ensuring proper voltage supply to the ECM.
6. Are there any DIY repair tips for OBDII code P0601?
- DIY repair is not recommended for this code due to the complexity involved in diagnosing and repairing ECM-related issues. It is advisable to seek professional help.
7. Is it safe to continue driving with OBDII code P0601?
- It is not recommended to drive the vehicle with this code illuminated as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.
8. How much does it typically cost to repair OBDII code P0601?
- The cost of repairing this code can vary depending on the root cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.
9. Can OBDII code P0601 be intermittent?
- Yes, the code can sometimes be intermittent, meaning it may appear and disappear sporadically. However, it still indicates an underlying issue that needs to be addressed.
10. How long does it take to repair OBDII code P0601?
- The repair time can vary based on the specific cause of the code and the complexity of the repair. It may take a few hours to a day or more to fully diagnose and fix the issue.
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