AutoCodes – Generic – P1728

P1728 Code - Transmission Slip Error

Quick Answer

With the engine running in gear, the Powertrain Control Module (PCM) receives a signal that the transmission was slipping in gear. Common causes include Low or dirty transmission fluid, Check for transmission mechanical problems. 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
P1728 indicates Transmission Slip Error.
Common causes
Common causes include Low or dirty transmission fluid, Check for transmission mechanical problems.
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 39,101
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Dec 27, 2021
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Code P1728 Description

With the engine running in gear, the Powertrain Control Module (PCM) receives a signal that the transmission was slipping in gear. This condition occurs when there is excessive transmission slip and as a result, there is no Torque Converter Clutch (TCC) operation. This is a mechanical failed transmission.
OBDII Code P1728 - Transmission Slip Error - AutoCodes.com
P1728 Code - Transmission Slip Error

What are the Possible Causes of the DTC P1728?

  • Low or dirty transmission fluid
  • Check for transmission mechanical problems

How to Fix the DTC P1728?

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 P1728 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 P1728 code?

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Need Help with the Code?

Get the P1728 code diagnosed by a professional: Find a repair shop in your area

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 P1728 Code

1. What are the common symptoms of OBDII code P1728 (Transmission Slip Error)?

- Common symptoms include harsh shifting, delayed engagement when shifting gears, transmission slipping, and potentially decreased fuel efficiency.

2. What are the possible causes of OBDII code P1728?

- The code P1728 can be caused by issues such as low transmission fluid levels, a faulty transmission solenoid, a malfunctioning torque converter, or internal transmission damage.

3. How serious is OBDII code P1728 (Transmission Slip Error)?

- OBDII code P1728 should be taken seriously as it can lead to further transmission damage if left unrepaired. It is recommended to address the issue promptly to prevent more extensive repairs.

4. Can I continue driving my vehicle with OBDII code P1728?

- It is not recommended to continue driving your vehicle with OBDII code P1728, as it can cause further damage to the transmission. It is best to have the issue diagnosed and repaired as soon as possible.

5. How can I diagnose OBDII code P1728 at home?

- You can diagnose OBDII code P1728 by using an OBDII scanner to read the trouble codes stored in the vehicle's computer. However, further diagnosis by a professional may be required to pinpoint the exact cause of the issue.

6. What are some repair tips for fixing OBDII code P1728?

- Some repair tips for addressing OBDII code P1728 include checking and topping up transmission fluid levels, inspecting and potentially replacing the transmission solenoid, and ensuring the torque converter is functioning correctly.

7. Can OBDII code P1728 be reset without fixing the underlying issue?

- Resetting OBDII code P1728 without fixing the underlying issue will only temporarily clear the code. The issue causing the code will persist, and the code is likely to reappear once the vehicle is driven again.

8. How much does it typically cost to repair OBDII code P1728?

- The cost to repair OBDII code P1728 can vary depending on the underlying cause of the issue, the extent of the damage, and the labor rates in your area. It is recommended to get a professional diagnosis to determine the exact repair cost.

9. Can a DIY enthusiast fix OBDII code P1728 at home?

- While some aspects of addressing OBDII code P1728 can be tackled by a DIY enthusiast, such as checking fluid levels, more complex repairs involving internal transmission components may require professional expertise and specialized tools.

10. How can I prevent OBDII code P1728 (Transmission Slip Error) from occurring?

- To prevent OBDII code P1728, it is essential to maintain regular transmission fluid checks and changes, drive your vehicle gently to avoid excessive wear on transmission components, and address any transmission issues promptly.

Discuss the causes and fixes for P1728 OBDII Code

  • if p1728 and c1627.c1513.p1730.c1611.p0705 is present:
    must find a bad circut to -Β  in your car

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