OBD Guide
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P1D91

Incorrect Gear Ratio Clutch 3 Defective

P1D91 is an OBD-II diagnostic trouble code meaning: Incorrect Gear Ratio Clutch 3 Defective. Common causes: wear of clutch friction discs, low or contaminated transmission fluid. Estimated repair cost: $56–278.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Jerking when shifting to third gear
  • Clutch slipping
  • Delays when shifting gears
  • Increased fuel consumption
  • Check Engine Light Illuminates

Causes

  • Wear of clutch friction discs
  • Low or contaminated transmission fluid
  • Malfunction of the hydraulic clutch unit
  • Problems with shaft speed sensors
  • Malfunction of the solenoid valves in the valve body

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the hydraulic clutch system
  3. Check the condition of the clutch friction discs
  4. Test speed sensors and solenoid valves
  5. If necessary, replace worn clutch components

Related codes

P1D90P1D92P0730

FAQ

What does the P1D91 code mean?

P1D91 is an OBD-II diagnostic trouble code that indicates: Incorrect Gear Ratio Clutch 3 Defective

What causes a P1D91 error code?

The most common causes of P1D91 include: Wear of clutch friction discs; Low or contaminated transmission fluid; Malfunction of the hydraulic clutch unit; Problems with shaft speed sensors.

How do I fix a P1D91 diagnostic trouble code?

To fix P1D91: Check the level and condition of the transmission fluid. Diagnose the hydraulic clutch system. Check the condition of the clutch friction discs. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1D91?

Limited driving only, diagnose soon

How much does it cost to fix P1D91?

The estimated repair cost for P1D91 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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