P0650 Trouble Code: Meaning, Symptoms, Causes & Fixes

If you’re seeing the P0650 trouble code in your car, you’re likely wondering what it means and how to fix it. This guide will walk you through everything you need to know.

I’ve dealt with this issue before, so you’re in good hands.

You’ll learn what P0650 means, its symptoms, causes, and how to fix it effectively. We’ll get you back on the road without any guesswork.

Alright, let’s get started.

What Does P0650 Trouble Code Mean?

The P0650 trouble code indicates a problem with the Malfunction Indicator Lamp (MIL) control circuit.

This code is set when the Powertrain Control Module (PCM) detects an issue with the circuit that controls the MIL, commonly known as the check engine light.

Essentially, your car’s computer isn’t communicating properly with this light, which can cause it to malfunction.

The MIL is a crucial part of your car’s diagnostic system. It alerts you when there’s an issue with the engine or emission control system.

When the P0650 code appears, it means the PCM has identified a fault in the circuit that operates this light.

This could result in the light not turning on when there’s an issue or staying on when there’s no problem.

The P0650 code can stem from several underlying issues. A common cause is a faulty MIL bulb, which means the light itself may need replacement.

Other causes include a broken or malfunctioning MIL circuit, problems with the PCM, or wiring issues like shorts or open circuits.

Diagnosing this code typically involves checking the MIL bulb first. If the bulb is functioning correctly, the next step is to inspect the wiring and connectors for any signs of damage or corrosion.

Finally, the PCM itself may need to be tested or replaced if no other issues are found.

Addressing the P0650 code is essential because it ensures that your car’s diagnostic system is working correctly.

Without a functioning MIL, you might not be alerted to other significant engine problems, which could lead to more severe damage over time.

By resolving the P0650 trouble code, you can maintain your vehicle’s health and reliability.

P0650 Trouble Code Symptoms

Here are the common symptoms you might notice with the P0650 trouble code:

• The check engine light doesn’t turn on.
• The check engine light stays on permanently.
• Other warning lights may also behave erratically.
• Intermittent illumination of the check engine light.
• No illumination of the check engine light during the bulb check when starting the car.

P0650 Trouble Code Causes

Here are the common causes behind the P0650 trouble code:

• Faulty MIL bulb
• Broken MIL circuit
• Issues with the car’s PCM (Powertrain Control Module)
• Wiring problems, such as shorts or open circuits
• Corroded or damaged connectors
• Faulty MIL driver in the PCM

How To Fix A P0650 Trouble Code

To fix a P0650 trouble code, follow these steps to diagnose and repair the issue:

1. Check the MIL Bulb

Ensure the bulb isn’t burned out. Replace it if necessary.

2. Inspect the MIL Circuit

Check the wiring and connectors in the MIL circuit for any signs of damage, corrosion, or disconnection. Repair or replace as needed.

3. Test the PCM

Use a diagnostic scanner to check if the PCM is sending signals to the MIL. If the PCM is faulty, it might need reprogramming or replacement.

4. Check for Wiring Issues

Look for shorts or open circuits in the wiring between the PCM and the MIL. Use a multimeter to test for continuity and repair any broken wires.

5. Inspect Connectors

Make sure all connectors are secure and free from corrosion. Clean and reattach any loose connectors.

6. Check the MIL Driver

If all other components are functioning correctly, the MIL driver in the PCM might be faulty. This usually requires professional diagnosis and repair.

7. Clear the Code

After addressing the issues, use an OBD-II scanner to clear the P0650 code. If the code returns, further diagnosis may be needed.

By following these steps, you can effectively diagnose and fix the P0650 trouble code, ensuring your check engine light works correctly and keeps you informed about your vehicle’s health.

Conclusion

Now that you know what the P0650 trouble code means and how to fix it, you’re ready to tackle the issue.

Have you ever dealt with a malfunctioning check engine light before?

Drop a comment below and share your experience or ask any questions you have about fixing this code!