P28A1

Cylinder 5 Ion Current Sense Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–33 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Power Loss
Check Engine Light Illuminates

Causes

Open or short circuit in the ion current circuit
Spark plug fault
Problems with the engine control unit
Wiring harness damage

How to Fix

Check the integrity of the ion current circuit
Replace spark plug
Check the operation of the engine control unit
Inspect the wiring harness for damage

Related codes

P28A0 P28A2 P28A3