P0838

Four Wheel Drive (4WD) Switch Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

4WD indicator flashes or stays off
Problems with switching drive modes
All-wheel drive system does not activate
Check Engine Light Is On

Causes

Faulty 4WD switch
Open or short circuit in the circuit
Poor contact in connectors
4WD control unit malfunction

How to Fix

Check the 4WD switch for malfunctions
Inspect the wiring harness and connectors for damage
Check voltage and resistance in the circuit
Replace switch if necessary

Related codes

P0836 P0837 P0839