P28A9

Cylinder 7 Ion Current Sense Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Rough engine idling
Loss of engine power
Increased fuel consumption
Malfunction indicator light comes on
Misfire in cylinder 7

Causes

Open or short circuit in the wiring to the ion current sensor
Damaged ion current sensor connector
Faulty ion current sensor of cylinder 7
Problems with the engine control unit
Poor ground connection

How to Fix

Visual inspection of ion current circuit wiring and connectors
Checking the resistance and continuity of the sensor circuit
Testing the ion current sensor of cylinder 7
Checking engine ground connections
Engine control unit diagnostics

Related codes

P0307 P0357 P2600