P28B3

Cylinder 9 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
Increased fuel consumption
Reduced engine power
Check Engine Light Illuminates
Possible misfires

Causes

Open or short circuit in the sensor circuit
Ion current sensor malfunction
Wiring Harness Problems
Engine control module malfunction
Corrosion of contacts or connectors

How to Fix

Check the integrity of the sensor circuit
Inspect connectors and contacts for corrosion
Check the resistance of the ion current sensor
If necessary, replace the sensor or repair the wiring
Reset the code and check if the error is returned

Related codes

P28B0 P28B1 P28B2