AutoCodes – Infiniti – P1650 Infiniti

P1650 Infiniti Code - Starter Motor Relay 2

Quick Answer

The Engine Control Module (ECM) controls ON/OFF state of the starter relay, according to the engine and vehicle condition. Common causes include Faulty Intelligent Power Distribution Module (IPDM) Engine Room (E/R), IPDM E/R harness is open or shorted, IPDM E/R 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: P1650 Infiniti indicates Starter Motor Relay 2.
Common causes: Common causes include Faulty Intelligent Power Distribution Module (IPDM) Engine Room (E/R), IPDM E/R harness is open or shorted, IPDM E/R 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 1,769

How popular is this code, among other codes? Low

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 Sep 18, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1650 Infiniti Description

The Engine Control Module (ECM) controls ON/OFF state of the starter relay, according to the engine and vehicle condition. The ECM transmits a control signal to the Intelligent Power Distribution Module (IPDM) Engine Room (E/R) by CAN communication. Under normal conditions, the ECM controls and maintains the starter relay in OFF state during the following condition: The engine is running, the selector lever is D position. (CVT models), and the clutch pedal is fully released. (M/T models). When detecting a decrease in engine speed due to rapid deceleration or heavy load conditions, ECM controls and reactivates the starter relay. The IPDM E/R detects a control state of the starter relay and starter control relay and transmits a feedback signal to ECM via CAN communication. The Diagnostic Trouble Code (DTC) will set when the starter relay is stuck ON, the starter relay power supply circuit is an excessively high voltage, or the starter relay circuit is excessively low voltage.

OBDII Code P1650 Infiniti - Starter Motor Relay 2 - AutoCodes.com — P1650 Infiniti Code - Starter Motor Relay 2

What does this mean?

What are the Possible Causes of the DTC P1650 Infiniti?

Faulty Intelligent Power Distribution Module (IPDM) Engine Room (E/R)
IPDM E/R harness is open or shorted
IPDM E/R circuit poor electrical connection

How to Fix the DTC P1650 Infiniti?

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

The Starter Motor Relay is part of the Intelligent Power Distribution Module (IPDM) Engine Room (E/R) and is not serviceable.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1650 Infiniti 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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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 P1650 Infiniti Code

1. What are the common symptoms of OBDII code P1650 in an Infiniti related to Starter Motor Relay 2?

The common symptoms include difficulty starting the vehicle, intermittent starting issues, or the starter not engaging at all.

2. What causes the OBDII code P1650 related to Starter Motor Relay 2 in an Infiniti?

This code is typically triggered by a malfunction in the Starter Motor Relay 2 circuit, such as a faulty relay, wiring issues, or a defective starter motor.

3. How can I diagnose the OBDII code P1650 in my Infiniti related to Starter Motor Relay 2?

Diagnosis involves checking the Starter Motor Relay 2 for proper functioning, inspecting the related wiring for damage, and testing the starter motor to ensure it is operating correctly.

4. Can a DIY enthusiast repair OBDII code P1650 related to Starter Motor Relay 2 in an Infiniti?

DIY repairs are possible if you have the necessary tools and knowledge. Replacing the faulty Starter Motor Relay 2, repairing damaged wiring, or replacing the starter motor are common repair tasks.

5. Is it safe to continue driving my Infiniti with the OBDII code P1650 related to Starter Motor Relay 2?

It is not recommended to drive the vehicle with this code present, as it can lead to potential starting issues and leave you stranded. It is best to address the problem promptly.

6. How much does it typically cost to repair OBDII code P1650 related to Starter Motor Relay 2 in an Infiniti?

The cost can vary depending on the exact cause of the issue and whether you choose to do the repairs yourself or take it to a professional. Costs may range from a few hundred dollars to over a thousand.

7. Are there any preventive measures to avoid triggering the OBDII code P1650 in an Infiniti related to Starter Motor Relay 2?

Regularly inspecting the starter motor relay, maintaining the electrical system, and addressing any starting issues promptly can help prevent this code from appearing.

8. Can a bad battery cause the OBDII code P1650 related to Starter Motor Relay 2 in an Infiniti?

Yes, a weak or failing battery can sometimes trigger this code due to insufficient power reaching the starter motor relay. It's important to ensure the battery is in good condition.

9. How long does it typically take to repair OBDII code P1650 related to Starter Motor Relay 2 in an Infiniti?

The repair time can vary based on the exact cause of the issue and your level of expertise. It can take anywhere from an hour to several hours to complete the repair.

10. Will resetting the OBDII system clear the P1650 code related to Starter Motor Relay 2 in an Infiniti?

While clearing the code may temporarily turn off the check engine light, it will not fix the underlying issue causing the code. It's crucial to diagnose and repair the problem to prevent it from recurring.