P28A2

Cylinder 5 Ion Current Sense Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine idling
Possible misfire in cylinder 5

Causes

Open or short circuit in the ion current circuit
Ion current sensor malfunction
Problems with the wiring harness or connectors
Mechanical problems in the cylinder (compression, valves)
Engine control unit malfunction

How to Fix

Check the integrity of the ion current circuit
Inspect connectors and wiring harness for damage
Check the functionality of the ion current sensor
Measure compression in cylinder 5
If necessary, replace the sensor or repair the wiring

Related codes

P28A0 P28A1 P28A3