OBD Guide

P1D25

Shift Control Rationality

P1D25 is an OBD-II diagnostic trouble code meaning: Shift Control Rationality. Common causes: low or contaminated transmission fluid, shift solenoids malfunction. Estimated repair cost: $17–111.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–111 (est.)

Symptoms

  • Incorrect gear shifting
  • Delays when shifting gears
  • Jerks when switching
  • Switching to emergency mode of the gearbox
  • Check Engine Light Illuminates

Causes

  • Low or contaminated transmission fluid
  • Shift solenoids malfunction
  • Problems with shaft speed sensors
  • Mechanical wear of gearbox components
  • Software error in the TCM control unit

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the operation of switching solenoids
  3. Check speed sensors and their wiring
  4. Perform gearbox adaptation
  5. Update TCM software

Related codes

FAQ

What does the P1D25 code mean?

P1D25 is an OBD-II diagnostic trouble code that indicates: Shift Control Rationality

What causes a P1D25 error code?

The most common causes of P1D25 include: Low or contaminated transmission fluid; Shift solenoids malfunction; Problems with shaft speed sensors; Mechanical wear of gearbox components.

How do I fix a P1D25 diagnostic trouble code?

To fix P1D25: Check the level and condition of the transmission fluid. Diagnose the operation of switching solenoids. Check speed sensors and their wiring. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1D25?

Limited driving only, diagnose soon

How much does it cost to fix P1D25?

The estimated repair cost for P1D25 is $17–111. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat