AutoCodes – Chrysler – P0729 Chrysler

P0729 Chrysler Code - Automatic Transmission 6th Gear Incorrect Ratio

Quick Answer

This malfunction is detected when the A/T does not shift into 6GR position as instructed by TCM. Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Hydraulic circuit fault. 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: P0729 Chrysler indicates Automatic Transmission 6th Gear Incorrect Ratio.
Common causes: Common causes include Low transmission fluid level, Shift solenoid mechanical fault, Hydraulic circuit fault.
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 12,636

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 Jul 29, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0729 Chrysler Description

This malfunction is detected when the A/T does not shift into 6GR position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.

OBDII Code P0729 Chrysler - Automatic Transmission 6th Gear Incorrect Ratio - AutoCodes.com — P0729 Chrysler Code - Automatic Transmission 6th Gear Incorrect Ratio

What does this mean?

What are the Possible Causes of the DTC P0729 Chrysler?

Low transmission fluid level
Shift solenoid mechanical fault
Hydraulic circuit fault
Transmission failure

How to Fix the DTC P0729 Chrysler?

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 P0729 Chrysler 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.