P0836

Four Wheel Drive (4WD) Switch Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

All wheel drive indicator does not work
All-wheel drive system does not activate
Check Engine light comes on
The car can remain in four-wheel drive mode
Errors in the transmission system

Causes

Open or short circuit in switch circuit
Faulty 4WD switch
Poor contact in connectors
Problems with the transmission control unit
Contact corrosion

How to Fix

Check the integrity of the wiring and connectors
Test 4WD switch
Clean contacts from corrosion
Check the operation of the transmission control unit
Replace switch if necessary

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