P289F

Cylinder 4 Ion Current Sense Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine operation
Misfire in cylinder 4
Increased fuel consumption
Reduced engine power
Check Engine Light Illuminates

Causes

Open or short circuit in the ion current circuit
Faulty spark plug
Wiring harness damage
Problems with the engine control unit
Contact corrosion

How to Fix

Check the integrity of the ion current circuit
Inspect the spark plug of the 4th cylinder
Check the condition of the wiring harness
Test circuit resistance
If necessary, replace faulty components

Related codes

P289E P28A0 P0304