Ion Sense System Performance

Common symptoms

What you'll notice

• Check and clean the mass air flow sensor for any dirt or debris.
• Replace or clean the oxygen sensor to ensure accurate readings of the air
• fuel mixture.
• Inspect and replace the spark plugs if necessary to improve combustion and performance.
• Check the ignition coil for any faults or damages, and replace if needed.

Common causes

Most likely first

1. Faulty spark plugs
2. Faulty Ignition coil
3. Excessive engine wear
4. Faulty Ion sense circuitry

How to diagnose & fix

Work through it in order

1. Engine misfires, leading to a rough idle or hesitation during acceleration
2. Reduction in engine power and overall performance
3. Increased fuel consumption
4. Difficulties starting the vehicle
5. The Check Engine light illuminates on the dashboard