P2890

Cylinder 1 Ion Current Sense Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check Engine Light Illuminates
Problems starting the engine
Reduced engine power

Causes

Open or short circuit in the sensor circuit
Ion current sensor malfunction
Connector problems or contact corrosion
Engine control unit malfunction
Mechanical problems in the cylinder (rare)

How to Fix

Check the integrity of wiring and connectors
Check the resistance of the ion current sensor
Inspect the spark plugs of the first cylinder
Check circuit parameters using an oscilloscope
If necessary, replace the sensor or repair the wiring

Related codes

P2891 P2892 P2893