P28B2

Cylinder 9 Ion Current Sense Circuit Low

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
Malfunction of the cylinder 9 ion current sensor
Connector problems or contact corrosion
Engine control unit malfunction
Wiring harness damage

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and contacts for damage
Check the resistance of the ion current sensor
Scan the control unit for other errors
If necessary, replace the sensor or repair the wiring

Related codes

P28B0 P28B1 P28B3