P28AB

Cylinder 7 Ion Current Sense Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Misfire in cylinder 7
Increased fuel consumption
Loss of engine power
Check Engine Light Illuminates

Causes

Open or short circuit in the ion current circuit
Malfunction of the ion current sensor of the 7th cylinder
Problem with spark plug in cylinder 7
Low compression in cylinder 7
Engine control module malfunction

How to Fix

Check the integrity of the wiring to the ion current sensor of the 7th cylinder
Test the resistance of the ion current sensor
Check the condition of the spark plug in cylinder 7
Measure compression in cylinder 7
If necessary, replace the ion current sensor

Related codes

P28A0 P28A1 P28AC