P279D

Four Wheel Drive (4WD) Range Signal Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine Light Is On
Problems with switching all-wheel drive modes
Unexpected change in all-wheel drive behavior
Reduced traction on difficult road surfaces

Causes

Open or short circuit in signal circuit
Gear range sensor malfunction
Problems with the 4WD control unit
Corrosion of contacts or connectors
Mechanical damage to wiring

How to Fix

Check signal circuit integrity
Check the operation of the gear range sensor
Check connections and connectors for corrosion
Diagnose the 4WD control unit
Replace damaged components if necessary

Related codes

P279A P279B P279C