P28A4

Cylinder 6 Ion Current Sense Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Possible misfires

Causes

Open or short circuit in the sensor circuit
Ion current sensor malfunction
Connector problems or contact corrosion
Engine control unit malfunction
Mechanical problems in the cylinder (rare)

How to Fix

Check the integrity of wiring and connectors
Check the resistance of the ion current sensor
Inspect contacts for corrosion
If necessary, replace the ion current sensor
Check the operation of the engine control unit

Related codes

P28A0 P28A1 P28A2 P28A3