AutoCodes – Generic – P1DA4

P1DA4 Code - Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective

Quick Answer

The Transmission Control Module (TCM) monitors for conditions which lead to an unexpected transmission gear ratio (e.g. Common causes include Faulty Transmission Internal Components. 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: P1DA4 indicates Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective .
Common causes: Common causes include Faulty Transmission Internal Components.
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 1,968

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 Apr 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1DA4 Description

The Transmission Control Module (TCM) monitors for conditions which lead to an unexpected transmission gear ratio (e.g. slipping clutches, hydraulic or mechanical defects, etc.). The TCM compares the actual gear ratio (i.e. the ratio of input speed to output speed) to a minimum and maximum calibrated gear ratio value. The TCM performs this comparison while driving in a fixed gear, during gear engagement, and during shifting from one gear to another.

OBDII Code P1DA4 - Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective - AutoCodes.com — P1DA4 Code - Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective

What does this mean?

What are the Possible Causes of the DTC P1DA4?

Faulty Transmission Internal Components

How to Fix the DTC P1DA4?

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 P1DA4 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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Need Help with the Code?

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Information for Specific Makes

P1DA4 Acura — Voltage Control Unit Current Too High Generator Motor Control Module
P1DA4 Chrysler — Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective
P1DA4 Dodge — Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective
P1DA4 Fiat — Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective
P1DA4 Honda — Voltage Control Unit Current Too High Generator Motor Control Module
P1DA4 Jeep — Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective

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 P1DA4 Code

1. What does OBDII code P1DA4 mean?

The P1DA4 code indicates an incorrect gear ratio due to a defective clutch 'B', 'C', or 'D' in the transmission system, often pointing to an internal mechanical or hydraulic issue.

2. What are the common symptoms of code P1DA4?

Symptoms may include erratic shifting, slipping gears, inability to shift into certain gears, reduced performance, or the illumination of the check engine light.

3. What causes the P1DA4 code to appear?

Common causes include worn or damaged clutch components, low or contaminated transmission fluid, faulty solenoids, or sensor malfunctions in the transmission system.

4. Can driving with a P1DA4 code damage my vehicle?

Yes, continuing to drive with this code may cause further damage to the transmission, leading to more costly repairs.

5. How can I fix the P1DA4 error code?

Repairs may involve replacing the defective clutch components, addressing hydraulic issues, flushing or replacing the transmission fluid, or recalibrating the transmission control module.

6. Is the P1DA4 code specific to certain car brands?

This code is often specific to vehicles with advanced automatic or dual-clutch transmissions, but the exact meaning can vary slightly by manufacturer.

7. How is the P1DA4 code diagnosed?

Diagnosis typically involves scanning for related codes, inspecting the transmission fluid, testing clutch operation, and checking for mechanical or hydraulic issues in the transmission.

8. Can a transmission fluid change fix the P1DA4 code?

If the issue is caused by low or contaminated transmission fluid, a fluid change could resolve the problem. However, if the clutch is defective, further repairs will be needed.

9. How much does it cost to repair a P1DA4 code?

Repair costs can vary widely, ranging from $150 for a fluid change to over $1,000 for clutch replacements or major transmission repairs.

10. Can a software update fix the P1DA4 code?

In some cases, a software update for the transmission control module (TCM) may resolve the issue if it is caused by a calibration problem, but mechanical defects will require physical repairs.