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P0605 2003 Nissan Altima Sedan Code - Engine Control Module Fault

Quick Answer

The P0605 diagnostic trouble code (DTC) in a 2003 Nissan Altima Sedan indicates a fault with the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM). Common causes include Electrical short or open circuit in the ECM wiring, Corrosion or damage to ECM connectors, Software or programming issues within the ECM. 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 2003 Nissan Altima Sedan indicates Engine Control Module Fault.
Common causes
Common causes include Electrical short or open circuit in the ECM wiring, Corrosion or damage to ECM connectors, Software or programming issues within the ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0605 2003 Nissan Altima Sedan Description

The P0605 diagnostic trouble code (DTC) in a 2003 Nissan Altima Sedan indicates a fault with the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM). The ECM is a crucial component of the vehicle's onboard computer system that controls various functions, including engine performance, fuel efficiency, emissions, and transmission shifting. When the ECM malfunctions, it can lead to a range of issues that affect the vehicle's overall performance and drivability.

OBDII Code P0605 2003 Nissan Altima Sedan - Engine Control Module Fault
P0605 2003 Nissan Altima Sedan Code - Engine Control Module Fault

Common Causes of P0605 2003 Nissan Altima Sedan

  1. Electrical short or open circuit in the ECM wiring
  2. Corrosion or damage to ECM connectors
  3. Software or programming issues within the ECM
  4. Voltage spikes or fluctuations in the vehicle's electrical system
  5. Physical damage to the ECM from water intrusion or impact

Symptoms of P0605 2003 Nissan Altima Sedan

  1. Check Engine Light illuminated on the dashboard
  2. Engine misfires or rough idling
  3. Decreased fuel efficiency
  4. Stalling or difficulty starting the engine
  5. Transmission shifting issues

How to Fix P0605 2003 Nissan Altima Sedan

  1. Begin by conducting a thorough inspection of the ECM wiring, connectors, and surrounding components for any visible damage or corrosion.
  2. Use a diagnostic scan tool to retrieve freeze frame data and any other related DTCs to pinpoint the exact cause of the ECM fault.
  3. Check for any software updates or reprogramming procedures recommended by the manufacturer to address known issues with the ECM.
  4. If necessary, replace the ECM with a new unit or have the existing one repaired by a qualified technician to restore proper functionality.
  5. Clear the DTC and perform a test drive to ensure that the issue has been resolved and that the vehicle operates normally.

Cost to Fix P0605 2003 Nissan Altima Sedan

The cost of repairing a P0605 ECM fault in a 2003 Nissan Altima Sedan can vary depending on the extent of the damage and the specific repair needed. On average, replacing an ECM can range from $500 to $1500, including parts and labor. However, the total cost may be higher if additional diagnostic tests or repairs are required. It's recommended to consult with a trusted mechanic or dealership to get an accurate estimate based on your vehicle's specific needs and location. Keep in mind that labor rates can vary, with hourly rates typically ranging from $80 to $150.

What does this mean?

Tech Notes for P0605 2003 Nissan Altima Sedan

Try erasing the code first, if the light comes back ON you may have to replace the ECM to repair the problem.



There is a factory service bulletin for the 2003 Nissan Altima:

2003 Nissan Altima Factory Service Bulletin OBDII Code P0605

Need more information about the P0605 2003 Nissan Altima Sedan code?

Need more information on how to fix the P0605 2003 Nissan Altima Sedan code? Get Access to Factory Service Manuals

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0605 2003 Nissan Altima Sedan Code

1. What are common symptoms of OBDII code P0605 in a 2003 Nissan Altima Sedan?

- Common symptoms include rough idling, engine stalling, poor acceleration, and the Check Engine light illuminating.

2. What does OBDII code P0605 indicate in a 2003 Nissan Altima Sedan?

- OBDII code P0605 indicates a fault with the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM).

3. What are the potential causes of OBDII code P0605 in a 2003 Nissan Altima Sedan?

- The potential causes of P0605 include a faulty ECM, damaged wiring or connectors, software issues, or a failed ECM reprogramming attempt.

4. How can I diagnose OBDII code P0605 in a 2003 Nissan Altima Sedan?

- Diagnosis involves using an OBDII scanner to retrieve the code, checking for any related symptoms, and inspecting the ECM, wiring, and connectors for visible damage.

5. Can OBDII code P0605 be cleared/reset in a 2003 Nissan Altima Sedan?

- Yes, the code can be cleared using an OBDII scanner. However, if the underlying issue is not resolved, the code is likely to reappear.

6. Is it safe to continue driving a 2003 Nissan Altima Sedan with OBDII code P0605?

- While the vehicle may still operate, it is not recommended to drive with a P0605 fault as it can lead to performance issues and potential damage to the engine.

7. How can I repair OBDII code P0605 in a 2003 Nissan Altima Sedan?

- Repair options include replacing the ECM, repairing damaged wiring or connectors, reprogramming the ECM, or seeking assistance from a professional mechanic.

8. Can a DIY enthusiast fix OBDII code P0605 in a 2003 Nissan Altima Sedan?

- DIY enthusiasts with the necessary tools and expertise may be able to address P0605 by replacing the ECM or repairing wiring issues. However, complex repairs may require professional help.

9. Are there any recalls or technical service bulletins related to OBDII code P0605 in a 2003 Nissan Altima Sedan?

- It is advisable to check with Nissan or authorized service centers for any recalls or technical service bulletins related to OBDII code P0605 in the 2003 Nissan Altima Sedan.

10. How much does it typically cost to repair OBDII code P0605 in a 2003 Nissan Altima Sedan?

- The repair cost for OBDII code P0605 can vary depending on the underlying issue and the chosen repair method. Costs may range from a few hundred to a few thousand dollars.

Discuss the causes and fixes for P0605 2003 Nissan Altima Sedan OBDII Code

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  • Ok this car is really getting to me ive replaced camshaft sensor crankshaft sensor new valve cover new pcv valve and hose plugs coils speed sensor. And its still running like crap. Ive done the idle relearn all three of them for open closed and the other one when the ses light blinks and then start it after it goes solid. It has codes p0605 and p0725 checked all groundz and wires car has good power supply. I'm ready to just blow it up and take the loss this car is nice inside but the motor is junk and nissan should sued for even making a car that has so many issues and recalls

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