AutoCodes – Acura – P1730 Acura

P1730 Acura Code - Problem In Shift Control System

Quick Answer

Hydraulic pressure to each clutch is controlled by the shift valve. Common causes include Faulty Shift Solenoid Valves, Shift Solenoid Valves harness is open or shorted, Shift Solenoid Valves 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 Acura indicates Problem In Shift Control System.
Common causes: Common causes include Faulty Shift Solenoid Valves, Shift Solenoid Valves harness is open or shorted, Shift Solenoid Valves 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 3,582

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 Oct 09, 2019

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

Hydraulic pressure to each clutch is controlled by the shift valve. The shift valve activates according to the ON/OFF status of shift solenoid valves A, B, C, D, and E. Hydraulic pressure supply in D position is shown above. The line pressure or the clutch pressure control pressure (CPC A, CPC B, or CPC C) is supplied to each clutch by the shift valve activated. The Powertrain Control Module (PCM) computes the actual ratio of mainshaft to countershaft revolutions. If a difference between the actual ratio and the commanded gear occurs when shifting to each gear position, a malfunction in the shift solenoid valve or the hydraulic system is detected and a Diagnostic Trouble Code (DTC) is stored.

OBDII Code P1730 Acura - Problem In Shift Control System - AutoCodes.com — P1730 Acura Code - Problem In Shift Control System

What does this mean?

What are the Possible Causes of the DTC P1730 Acura?

Faulty Shift Solenoid Valves
Shift Solenoid Valves harness is open or shorted
Shift Solenoid Valves circuit poor electrical connection

How to Fix the DTC P1730 Acura?

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 Acura 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 P1730 Acura Code

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

The P1730 code indicates a problem in the shift control system, which can affect the vehicle's ability to shift gears properly.

2. What are the common symptoms of the P1730 code in an Acura?

Symptoms may include harsh or delayed shifting, transmission slipping, gear engagement issues, or the vehicle going into limp mode.

3. What causes the P1730 code to appear in an Acura?

Common causes include a faulty shift solenoid, transmission fluid issues, wiring or connector problems, or a malfunctioning transmission control module (TCM).

4. Can low or dirty transmission fluid cause the P1730 code?

Yes, low or contaminated transmission fluid can cause shift control issues and trigger the P1730 code.

5. How is the P1730 code diagnosed?

A technician will typically use a scan tool to read the code, inspect transmission fluid levels and condition, check the wiring and connectors, and test the shift solenoids.

6. Can I drive my Acura with the P1730 code?

Driving with this code is not recommended, as it may lead to further transmission damage or unsafe driving conditions.

7. How do you fix the P1730 code on an Acura?

Repairs may include replacing a faulty shift solenoid, cleaning or replacing transmission fluid, repairing damaged wiring, or reprogramming or replacing the TCM.

8. Is the P1730 code specific to Acura vehicles?

While P1730 is commonly associated with Acura, it can also appear on other vehicles with similar shift control system issues.

9. How much does it cost to fix the P1730 code?

Repair costs vary depending on the cause but typically range from $150 for minor fixes like fluid replacement to over $1,000 for solenoid or TCM replacement.

10. Can resetting the code clear the P1730 issue permanently?

Clearing the code without addressing the root cause will likely result in the code returning. Proper diagnosis and repair are necessary.