P02B0: Cylinder 6 - Injector Restricted

What it means

The control module detected restricted fuel flow through the cylinder 6 injector.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

The engine computer monitors fuel delivery and combustion for cylinder 6. This code sets when it detects less fuel flow through cylinder 6's injector than expected; it identifies a restriction but not whether the nozzle, supply, or electrical control is responsible.

Common causes

Most likely first.

1. Injector nozzle clogged or contaminated
2. Restricted fuel supply to injector
3. Injector electrical or control fault
4. Fuel contamination

Symptoms

• Check-engine light
• Rough idle or engine vibration
• Misfire or hesitation
• Reduced engine power

How to diagnose it

1. Check freeze-frame data and cylinder 6 misfire counts to establish when the restricted flow is detected.
2. Inspect cylinder 6 injector connector and wiring for corrosion, damage, or a loose connection.
3. Compare cylinder 6 contribution and injector operation with other cylinders using an appropriate scan-tool or balance test.
4. Check the fuel supply to cylinder 6's injector and inspect for contamination using the applicable test procedure.
5. Test injector control and flow, comparing results with the manufacturer's specification.

Common fixes

• Repair a loose or damaged cylinder 6 injector connection.
• Clean a contaminated cylinder 6 injector if testing supports cleaning.
• Replace a cylinder 6 injector that fails a flow test.
• Correct contaminated fuel or a restricted supply to the injector.

Can I keep driving?

If the engine runs smoothly, drive gently and get the restriction checked soon; avoid heavy loads if it hesitates or misfires. Ongoing misfire can damage the catalytic converter.