P0837

Four Wheel Drive (4WD) Switch Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

4WD indicator does not work or flashes
All-wheel drive system does not switch between modes
Check Engine light comes on
The car can remain in one drive mode
Diagnostic system memory error

Causes

Faulty 4WD switch
Open or short circuit in switch circuit
Poor contact in connectors
Wiring Harness Problems
4WD control unit malfunction

How to Fix

Check the 4WD switch for damage
Check the continuity of the switch circuit
Inspect connectors and contacts for corrosion
Check switch resistance
If necessary, replace the 4WD switch

Related codes

P0836 P0838 P0839