P0605 2004 Nissan Altima Sedan Code - Engine Control Module Fault
Quick Answer
The Engine Control Module (ECM) continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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
- P0605 2004 Nissan Altima Sedan indicates Engine Control Module Fault.
- Common causes
- Common causes include Engine Control Module (ECM) may be faulty, ECM harness power supply circuit is open or shorted, ECM harness ground 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 P0605 2004 Nissan Altima Sedan Description
What are the Possible Causes of the DTC P0605 2004 Nissan Altima Sedan?
- Engine Control Module (ECM) may be faulty
- ECM harness power supply circuit is open or shorted
- ECM harness ground circuit is open or shorted
How to Fix the DTC P0605 2004 Nissan Altima Sedan?
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
There is a factory service bulletin for the 2004 Nissan Altima:
2004 Nissan Altima Factory Service Bulletin OBDII Code P0605
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0605 2004 Nissan Altima Sedan 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 P0605 2004 Nissan Altima Sedan Code
1. What does the OBDII code P0605 mean on a 2004 Nissan Altima Sedan?
The P0605 code indicates a fault in the Engine Control Module (ECM), specifically an internal control module read-only memory (ROM) error.
2. What are the symptoms of the P0605 code in a 2004 Nissan Altima?
Symptoms may include the check engine light turning on, engine misfires, rough idling, reduced fuel efficiency, or the engine failing to start.
3. What causes the P0605 code in a Nissan Altima?
Common causes include a damaged or failing ECM, corrupted ECM software, electrical issues such as loose connections, or exposure to water or excessive heat.
4. Can I drive my 2004 Nissan Altima with a P0605 code?
Driving with this code is not recommended, as it may cause poor performance or lead to further damage to the engine or ECM.
5. How do I diagnose the P0605 code on a 2004 Nissan Altima?
Diagnosis typically involves scanning for other related codes, inspecting ECM connections and wiring, and testing the ECM for proper functionality using specialized equipment.
6. Does the P0605 code always mean the ECM needs to be replaced?
No, it does not always mean replacement. Sometimes the issue can be resolved by reprogramming the ECM or fixing wiring and connection problems.
7. How much does it cost to fix the P0605 code on a Nissan Altima?
Repair costs can range from $100 for reprogramming to over $1,000 if the ECM needs to be replaced and reprogrammed.
8. Can a low battery cause the P0605 code on a 2004 Nissan Altima?
Yes, a weak or failing battery can sometimes cause voltage irregularities that trigger ECM errors like P0605.
9. How is the ECM replaced on a 2004 Nissan Altima?
Replacing the ECM involves disconnecting the battery, removing the faulty ECM, installing a new one, and programming it to match the vehicle’s specifications.
10. Can a P0605 code clear itself on a 2004 Nissan Altima?
The code may clear temporarily if the issue is intermittent, but the underlying problem must be addressed to prevent it from returning.
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