P279F

Four Wheel Drive (4WD) Range Signal Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
All-wheel drive system does not switch between modes
The car may go into emergency mode
Reduced all-wheel drive efficiency
Possible control problems on slippery surfaces

Causes

Four-wheel drive range sensor malfunction
Open or short circuit in signal circuit
Poor contact in circuit connectors
Four-wheel drive control module malfunction
Circuit Grounding Problems

How to Fix

Check the status of the four-wheel drive range sensor
Check the integrity of the wiring and connectors in the circuit
Check voltage and resistance in signal circuit
Scan the four-wheel drive control module for errors
If necessary, replace faulty components

Related codes

P279E P27A0 P27A1