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GTECH Calibration
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P1836

Kick-Down Switch Failed Open.

  • Saturn
  • Powertrain
  • Manufacturer code
  • Low severity

How this code is built

P
SystemPowertrain
1
Defined byThe manufacturer
8
AreaTransmission
36
FaultThe specific fault in that area

What it means

P1836 on a Saturn means the control unit has detected that the kick-down switch has failed open. This switch tells the transmission control side that the accelerator has been pushed fully down for a downshift. The control unit expects the switch to close at wide-open throttle, but it saw an open circuit or no signal when it expected one.

Symptoms

  • Transmission does not downshift when the accelerator is pressed fully down
  • Poor or flat acceleration when overtaking
  • Malfunction indicator lamp on, or a transmission warning lamp
  • Harsh, late or unusual shift behaviour
  • Code stored with no other obvious driveability fault

Possible causes

  • Faulty or misadjusted kick-down switch (worn or failed contacts)likely
  • Open circuit, chafed wire or poor connection in the switch wiringlikely
  • Corroded, loose or damaged switch connector terminalspossible
  • Accelerator pedal or throttle position assembly fault affecting the kick-down signalpossible
  • Poor power or ground supply to the switch circuitpossible
  • Fault inside the control unitrare

How to diagnose

  1. Read all stored codes and freeze frame data, and note whether other throttle or transmission codes are present
  2. Check the switch location and type for your model and engine, as it can vary between Saturn applications
  3. Inspect the switch, its mounting and the wiring and connector for damage, corrosion, water or chafing
  4. Check the switch adjustment and that the pedal or throttle linkage reaches the switch at full travel
  5. Watch the switch status on a scan tool while pressing the pedal fully down and confirm it changes state
  6. Test the switch continuity with the pedal released and fully pressed, against the manufacturer's specification
  7. Check the supply, signal and ground wiring for open circuits and high resistance
  8. Check the throttle or pedal position signal for plausibility before suspecting the control unit

How to fix

  • Replace the kick-down switch if it fails the continuity test or does not change state
  • Repair or replace damaged wiring and open circuits in the switch circuit
  • Clean or replace corroded connector terminals and secure the connector
  • Adjust the switch or linkage so it operates correctly at full pedal travel
  • Repair or replace the pedal or throttle assembly if its signal is faulty
  • Clear the code after repair and road test to confirm it does not return

Can I keep driving?

Low severity

The car can normally be driven as the main effect is the loss of the forced downshift, but acceleration when overtaking will be reduced. Book it in soon, and take extra care if the transmission is also shifting harshly.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.

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