OBD Guide
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P1751

Mechanical Problem In Hydraulic Control System Of Shift Solenoid Valve 'B'

P1751 is an OBD-II diagnostic trouble code meaning: Mechanical Problem In Hydraulic Control System Of Shift Solenoid Valve 'B'. Common causes: clogged hydraulic system, transmission fluid leak. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–89 (est.)

Symptoms

  • Gear shifting problems
  • The car goes into emergency mode
  • Increased engine speed
  • Jerks when switching
  • Check Engine light comes on

Causes

  • Clogged hydraulic system
  • Transmission fluid leak
  • Mechanical wear of the solenoid
  • Seal damage
  • Shift valve problems

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the hydraulic system for leaks
  3. Check condition of solenoid 'B'
  4. Clean or replace solenoid if necessary
  5. Replacing damaged seals and gaskets

Related codes

P0751P0756P1761

Error P1751 by Vehicle Brand

BMWFordLincolnMazdaMercuryMitsubishiVolkswagen

FAQ

What does the P1751 code mean?

P1751 is an OBD-II diagnostic trouble code that indicates: Mechanical Problem In Hydraulic Control System Of Shift Solenoid Valve 'B'

What causes a P1751 error code?

The most common causes of P1751 include: Clogged hydraulic system; Transmission fluid leak; Mechanical wear of the solenoid; Seal damage.

How do I fix a P1751 diagnostic trouble code?

To fix P1751: Check the level and condition of the transmission fluid. Diagnose the hydraulic system for leaks. Check condition of solenoid 'B'. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1751?

Do not drive — repair immediately

How much does it cost to fix P1751?

The estimated repair cost for P1751 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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