OBD Guide

P1789

3-2 Timing/Coast Clutch Solenoid Circuit Shorted Conditions

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Incorrect gear shifting
  • Switching delays
  • Gaps in dynamics
  • Check Engine light comes on
  • The gearbox goes into emergency mode

Causes

  • Short circuit in solenoid circuit
  • Clutch solenoid malfunction
  • Wiring harness damage
  • Transmission control module (TCM) problems
  • Poor contact in connectors

How to Fix

  1. Check the integrity of the wiring to the solenoid
  2. Test solenoid resistance
  3. Check voltage at solenoid connectors
  4. Replace faulty solenoid if necessary
  5. Reset the error and check the operation of the gearbox

Related codes

Error P1789 by Vehicle Brand