P289B

Cylinder 3 Ion Current Sense Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Power reduction
Check Engine Light Illuminates
Dips during acceleration
Increased fuel consumption

Causes

Cylinder 3 ion current sensor malfunction
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Problems with the engine control module
Mechanical problems in the cylinder (rare)

How to Fix

Check the condition of the ion current sensor
Check the integrity of the wiring and connectors
Measure sensor resistance
Check the signal from the sensor with an oscilloscope
If necessary, replace the sensor or repair the wiring

Related codes

P289A P289C P289D