OBD Guide

P1738

Problem in 2nd Clutch Pressure Switch Circuit

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–167 (est.)

Symptoms

  • Gear shifting problems
  • Jerks when shifting gears
  • Delays when shifting gears
  • Transmission of the gearbox into emergency mode
  • Check Engine Light Illuminates

Causes

  • Open or short circuit in the sensor circuit
  • Clutch pressure sensor malfunction
  • Hydraulic fluid leak
  • Problems with the transmission control unit
  • Wiring harness damage

How to Fix

  1. Check the level and condition of the transmission fluid
  2. Diagnose the clutch pressure sensor circuit
  3. Check resistance and sensor signal
  4. Replace clutch pressure sensor if necessary
  5. Check and, if necessary, replace the transmission control unit

Related codes

Error P1738 by Vehicle Brand