P28A3

Cylinder 5 Ion Current Sense Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable engine idling
Possible misfire in cylinder 5

Causes

Malfunction of the ion current sensor of the 5th cylinder
Open or short circuit in the sensor circuit
Poor contact in the sensor connector
Wiring harness damage
Engine control module malfunction

How to Fix

Check the integrity of the ion current sensor circuit
Inspect the connectors and contacts of the sensor
Check the resistance of the ion current sensor
Replace ion current sensor if necessary
Check and, if necessary, replace the engine control module

Related codes

P28A0 P28A1 P28A2