AutoCodes – Infiniti – P1730 Infiniti

P1730 Infiniti Code - Automatic Transmission Interlock

Quick Answer

Fail-safe function to the transmission range switch detects the selector position and sends a signal to the Transmission Control Module (TCM). Common causes include Faulty low coast brake solenoid valve, Low coast brake solenoid valve harness is open or shorted, Low coast brake solenoid valve 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: P1730 Infiniti indicates Automatic Transmission Interlock.
Common causes: Common causes include Faulty low coast brake solenoid valve, Low coast brake solenoid valve harness is open or shorted, Low coast brake solenoid valve 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 20,520

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 12, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1730 Infiniti Description

Fail-safe function to the transmission range switch detects the selector position and sends a signal to the Transmission Control Module (TCM).

OBDII Code P1730 Infiniti - Automatic Transmission Interlock - AutoCodes.com — P1730 Infiniti Code - Automatic Transmission Interlock

What does this mean?

What are the Possible Causes of the DTC P1730 Infiniti?

Faulty low coast brake solenoid valve
Low coast brake solenoid valve harness is open or shorted
Low coast brake solenoid valve circuit poor electrical connection
Faulty Automatic Transmission Fluid (ATF) pressure switch 2

How to Fix the DTC P1730 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1730 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.

Need more information about the P1730 Infiniti code?

Need more information on how to fix the P1730 Infiniti code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1730 Infiniti code diagnosed by a professional: Find a repair shop in your area

Information for Specific Infiniti Models

P1730 2003 Infiniti G35 — Automatic Transmission Interlock
P1730 2004 Infiniti G35 — Automatic Transmission Interlock
P1730 2005 Infiniti G35 — Automatic Transmission Interlock
P1730 2006 Infiniti G35 — Automatic Transmission Interlock

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 P1730 Infiniti Code

1. What does the OBDII code P1730 mean on an Infiniti?

Code P1730 indicates an issue with the Automatic Transmission Interlock system, which ensures the transmission operates properly and prevents unsafe gear shifts.

2. What are the common symptoms of code P1730 on an Infiniti?

Symptoms may include difficulty shifting gears, the transmission stuck in one gear, unusual transmission noises, or the check engine light turning on.

3. What causes the P1730 code on an Infiniti?

The code is typically caused by a faulty transmission range sensor, damaged wiring or connectors, a malfunctioning shift interlock solenoid, or internal transmission issues.

4. Can I drive my Infiniti with a P1730 code?

Driving with a P1730 code is not recommended, as it could lead to further transmission damage and unsafe driving conditions.

5. How is the P1730 code diagnosed?

A mechanic will use an OBDII scanner to retrieve the code, inspect the transmission wiring and components, and test the shift interlock solenoid and transmission range sensor.

6. How do you fix a P1730 code on an Infiniti?

Repairs may include replacing the transmission range sensor, repairing damaged wiring, cleaning or replacing the shift interlock solenoid, or addressing deeper transmission issues.

7. How much does it cost to repair a P1730 code on an Infiniti?

Repair costs vary but typically range from $150 to $500, depending on the root cause and whether parts like the range sensor or solenoid need replacement.

8. Can a faulty battery cause a P1730 code on an Infiniti?

A weak or failing battery can sometimes cause electrical issues that may trigger the P1730 code, though this is less common.

9. Is the P1730 code specific to Infiniti vehicles?

While P1730 is commonly associated with Infiniti vehicles, it may also appear on other Nissan models with similar transmission systems.

10. How can I prevent a P1730 code from reoccurring?

Regular maintenance, including checking the transmission fluid level, inspecting wiring, and addressing minor transmission issues early, can help prevent this code.