OBD Guide
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P1DA4

Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective

P1DA4 is an OBD-II diagnostic trouble code meaning: Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective . Common causes: wear of clutch friction discs, malfunction of clutch control solenoids. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–278 (est.)

Symptoms

  • Gear shifting problems
  • Jerks or jolts when shifting
  • Gear start delay
  • Transmission overheating
  • Check Engine Light Illuminates

Causes

  • Wear of clutch friction discs
  • Malfunction of clutch control solenoids
  • Leaks in the hydraulic system
  • Low or contaminated transmission fluid
  • Transmission control module (TCM) problems

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the operation of clutch control solenoids
  3. Check the hydraulic system for leaks
  4. Inspect friction discs for wear
  5. If necessary, replace worn clutch components

Related codes

P1DA5P1DA6P0730

FAQ

What does the P1DA4 code mean?

P1DA4 is an OBD-II diagnostic trouble code that indicates: Incorrect Gear Ratio Clutch 'B' 'C' Or 'D' Defective

What causes a P1DA4 error code?

The most common causes of P1DA4 include: Wear of clutch friction discs; Malfunction of clutch control solenoids; Leaks in the hydraulic system; Low or contaminated transmission fluid.

How do I fix a P1DA4 diagnostic trouble code?

To fix P1DA4: Check the level and condition of the transmission fluid. Diagnose the operation of clutch control solenoids. Check the hydraulic system for leaks. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1DA4?

Do not drive — repair immediately

How much does it cost to fix P1DA4?

The estimated repair cost for P1DA4 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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