P28A8

Cylinder 7 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
Reduced engine power
Check Engine Light Illuminates
Possible misfire in cylinder 7

Causes

Open or short circuit in the sensor circuit
Ion current sensor malfunction
Problems with the engine control unit
Wiring harness damage
Contact corrosion

How to Fix

Check the integrity of the wiring to the sensor
Check the resistance of the ion current sensor
Inspect connectors for corrosion
Replace sensor if necessary
Check and update the ECU firmware

Related codes

P28A7 P28A9 P28AA