AutoCodes – Generic – P0650

P0650 Code - Malfunction Indicator Lamp Control Circuit Malfunction

Quick Answer

The Malfunction Indicator Lamp (MIL) illuminates to inform the driver that an emission system fault has occurred, and the powertrain control system requires service. Common causes include Faulty Malfunction Indicator Lamp Bulb, Malfunction Indicator Lamp Bulb harness is open or shorted, Malfunction Indicator Lamp Bulb 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: P0650 indicates Malfunction Indicator Lamp Control Circuit Malfunction.
Common causes: Common causes include Faulty Malfunction Indicator Lamp Bulb, Malfunction Indicator Lamp Bulb harness is open or shorted, Malfunction Indicator Lamp Bulb 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.

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Code Popularity 64,562

How popular is this code, among other codes? Medium

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 18, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0650 Description

The Malfunction Indicator Lamp (MIL) illuminates to inform the driver that an emission system fault has occurred, and the powertrain control system requires service. Ignition voltage is supplied directly to the MIL. The Engine Control Module (ECM) turns the MIL ON by grounding the MIL control circuit when the emission system fault occurs. Under normal operating conditions, the MIL should be ON only when the ignition is ON, and the engine is OFF. The Diagnostic Trouble Code (DTC) will be set when the ECM detects low voltage during the MIL control circuit driver OFF state. This indicates either a shorted to ground or an open MIL control circuit.

OBDII Code P0650 - Malfunction Indicator Lamp Control Circuit Malfunction - AutoCodes.com — P0650 Code - Malfunction Indicator Lamp Control Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0650?

Faulty Malfunction Indicator Lamp Bulb
Malfunction Indicator Lamp Bulb harness is open or shorted
Malfunction Indicator Lamp Bulb circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0650?

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 does this mean?

Code Tech Notes

If the condition is intermittent, move the related harnesses and connectors while monitoring the scan tool MIL control circuit status parameters. Perform this test with the ignition ON and the engine OFF, and with the engine running. The MIL control circuit status parameters change from OK or Not Run to Malfunction if there is a condition with a circuit or a connection.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0650 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

P0650 Buick — Malfunction Indicator Lamp Control Circuit
P0650 Cadillac — Malfunction Indicator Lamp Control Circuit
P0650 Chevrolet — Malfunction Indicator Lamp Control Circuit
P0650 GMC — Malfunction Indicator Lamp Control Circuit
P0650 Hyundai — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Infiniti — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Isuzu — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 KIA — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Land Rover — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Mercedes-Benz — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Nissan — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Pontiac — Malfunction Indicator Lamp Control Circuit
P0650 Saturn — Malfunction Indicator Lamp Control Circuit
P0650 Suzuki — Malfunction Indicator Lamp Control Circuit Malfunction
P0650 Volkswagen — Malfunction Indicator Lamp Control Circuit Malfunction

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 P0650 Code

1. What is OBDII code P0650?

- OBDII code P0650 refers to a malfunction in the Malfunction Indicator Lamp (MIL) control circuit.

2. What are the common symptoms of a P0650 code?

- The common symptoms of a P0650 code include the check engine light not illuminating or staying on constantly.

3. What are the possible causes of a P0650 code?

- Possible causes of a P0650 code include a faulty MIL control module, damaged wiring or connectors in the circuit, or a blown fuse related to the MIL system.

4. How do I diagnose a P0650 code?

- Diagnosing a P0650 code involves using an OBDII scanner to retrieve the code, inspecting the MIL control circuit for any visible damage, and testing the MIL module and related components for proper functionality.

5. Can a P0650 code be fixed by resetting the check engine light?

- Resetting the check engine light may temporarily clear the code, but it will not fix the underlying issue causing the P0650 code.

6. How serious is a P0650 code?

- While a P0650 code may not cause immediate drivability issues, it is important to address it promptly to ensure the proper functioning of the MIL system for monitoring vehicle emissions and performance.

7. What is the typical repair process for a P0650 code?

- The typical repair process for a P0650 code involves identifying and repairing the underlying cause, which may include replacing the MIL control module, repairing damaged wiring, or addressing any blown fuses.

8. Can I drive my vehicle with a P0650 code?

- It is generally safe to drive with a P0650 code, but it is recommended to have the issue diagnosed and repaired as soon as possible to ensure the proper operation of the MIL system.

9. How much does it cost to repair a P0650 code?

- The cost of repairing a P0650 code can vary depending on the specific cause of the issue, but it may involve replacing the MIL control module, repairing wiring, or addressing fuse-related issues.

10. Will a P0650 code cause my vehicle to fail an emissions test?

- Yes, a P0650 code can cause your vehicle to fail an emissions test since it indicates a malfunction in the Malfunction Indicator Lamp control circuit, which is essential for monitoring emissions-related systems.