P28BD

Cylinder 12 Ion Current Sense Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Possible misfire in cylinder 12

Causes

Open or short circuit in the ion control circuit
Faulty ion controlled spark plug
Problems with the wiring harness to the 12th cylinder
Engine control unit malfunction
Poor contact in circuit connectors

How to Fix

Check the integrity of the ion control circuit of the 12th cylinder
Inspect and, if necessary, replace the spark plug
Check the condition of the wiring harness and connectors
Test the operation of the engine control unit
Clear error codes and test drive

Related codes

P28B9 P28BC P28BE