AutoCodes – Generic – P1730

P1730 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 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 38,276
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 12, 2019
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Code P1730 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 - Automatic Transmission Interlock - AutoCodes.com
P1730 Code - Automatic Transmission Interlock

What are the Possible Causes of the DTC P1730?

  • 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?

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 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

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 Code

1. What does OBDII code P1730 indicate?

Code P1730 stands for Automatic Transmission Interlock. It typically indicates an issue with the automatic transmission interlock system.

2. What are the common symptoms of OBDII code P1730?

Common symptoms include difficulty shifting gears, the transmission not engaging properly, and the vehicle not starting due to the interlock system malfunction.

3. What are the possible causes of OBDII code P1730?

Possible causes include a faulty interlock solenoid, damaged wiring or connectors in the interlock system, low transmission fluid levels, or a malfunctioning transmission control module.

4. How can I diagnose OBDII code P1730?

Diagnosis typically involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, inspecting the interlock solenoid and related components, and testing the wiring and connectors for any issues.

5. Can I drive my vehicle with OBDII code P1730?

It is not recommended to drive your vehicle with code P1730, as it can lead to potential safety hazards and further damage to the transmission system.

6. How can I repair OBDII code P1730?

Repairs may involve replacing the faulty interlock solenoid, repairing damaged wiring or connectors, topping up or changing the transmission fluid, or reprogramming the transmission control module.

7. Will resetting the trouble code fix OBDII code P1730?

Resetting the trouble code may temporarily clear the warning light, but it will not fix the underlying issue causing code P1730. It is important to diagnose and repair the root cause of the problem.

8. How much does it cost to repair OBDII code P1730?

The cost of repairing code P1730 can vary depending on the specific cause of the issue, the labor rates in your area, and the cost of parts needed for the repair. It is advisable to consult a professional mechanic for an accurate estimate.

9. Is OBDII code P1730 a common issue in certain vehicle makes and models?

Code P1730 related to the Automatic Transmission Interlock can be more common in vehicles with automatic transmissions, especially in older models or those with high mileage.

10. Can I prevent OBDII code P1730 from occurring in the future?

Regular maintenance of your vehicle's transmission system, including checking fluid levels, addressing any leaks promptly, and following the manufacturer's recommended service intervals, can help prevent issues like code P1730 from occurring.

1. What are common symptoms of OBDII code P1730 (Automatic Transmission Interlock)?

- Common symptoms include the inability to shift gears, a stuck gear shift, and the transmission not engaging properly.

2. What causes OBDII code P1730 to trigger?

- This code is typically triggered by issues with the automatic transmission interlock system, such as a faulty interlock solenoid or wiring problems.

3. How can I diagnose OBDII code P1730?

- Diagnosing this code usually involves inspecting the automatic transmission interlock components, checking for any loose connections or damaged wiring, and using a scan tool to retrieve specific diagnostic trouble codes.

4. Can a DIYer repair OBDII code P1730 at home?

- While some basic troubleshooting like checking connections and wiring can be done at home, repairing OBDII code P1730 often requires specialized tools and expertise, so it's recommended to consult a professional mechanic.

5. Is it safe to drive with OBDII code P1730 present?

- It is not recommended to drive with this code present, as it can lead to potential safety hazards due to the transmission not functioning properly.

6. How much does it typically cost to repair OBDII code P1730?

- The cost of repairing this code can vary depending on the underlying issue, but it may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.

7. Can resetting the OBDII code P1730 fix the issue?

- Resetting the code may temporarily clear the warning light, but it will not fix the underlying problem causing the code to trigger. It's important to diagnose and address the root cause of the issue.

8. Are there any preventive measures to avoid OBDII code P1730?

- Regular maintenance of the automatic transmission system, such as fluid checks and replacements, can help prevent issues that may lead to OBDII code P1730.

9. Can a bad battery trigger OBDII code P1730?

- A weak or failing battery can potentially cause electrical issues that may lead to OBDII code P1730 triggering, so it's advisable to ensure the battery is in good condition.

10. How long does it take to repair OBDII code P1730?

- The repair time for OBDII code P1730 can vary depending on the exact cause of the issue and the complexity of the repair. It may take a few hours to a full day to complete the repair.

1. What are the common symptoms of OBDII code P1730 (Automatic Transmission Interlock)?

- Common symptoms include difficulty shifting gears, transmission not engaging properly, and the vehicle not moving when in gear.

2. What are the possible causes of OBDII code P1730?

- The code P1730 can be caused by issues with the transmission interlock solenoid, faulty wiring or connectors, low transmission fluid, or a malfunctioning transmission control module.

3. How can I diagnose OBDII code P1730?

- Diagnosing code P1730 typically involves using a scan tool to read the code and investigate the transmission interlock system, solenoid, wiring, and fluid levels for any issues.

4. Can OBDII code P1730 be fixed without professional help?

- Fixing code P1730 may require specialized knowledge and tools, so it's recommended to seek professional help from a qualified mechanic or technician.

5. What are the repair options for OBDII code P1730?

- Repair options may include replacing the transmission interlock solenoid, repairing damaged wiring or connectors, checking and filling transmission fluid, or reprogramming the transmission control module.

6. Is it safe to continue driving with OBDII code P1730 present?

- It is not recommended to continue driving with code P1730 present, as it can lead to further damage to the transmission and potentially unsafe driving conditions.

7. How much does it typically cost to repair OBDII code P1730?

- The cost of repairing code P1730 can vary depending on the specific issue causing the code, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P1730 at home?

- While some DIY enthusiasts may have the skills and tools to attempt the repair, it's important to assess your own capabilities and the complexity of the repair before attempting it at home.

9. What are the long-term consequences of ignoring OBDII code P1730?

- Ignoring code P1730 can lead to more severe transmission problems, potential safety hazards while driving, and ultimately more costly repairs in the future.

10. Is OBDII code P1730 a common issue in certain vehicle makes and models?

- OBDII code P1730 can be more common in certain vehicle makes and models with automatic transmissions, but it can potentially occur in any vehicle with an automatic transmission system.

Discuss the causes and fixes for P1730 OBDII Code

  • I have a Suzuki Jimny 2010. It had a slamming which I think is coming from the transmission.
    This code came up along with p1725. I have not been able to fix this issue for 3 years.
    I have rebuilt the transmission twice , charged the valve body, charged the torque converter
    Please help

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