P062D: Fuel Injector Driver Circuit Performance Bank 1

What it means

A performance fault has been detected in the fuel injector driver circuit for bank 1. The code does not identify a particular driver component or failure mechanism.

At a glance

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

How it works

The fuel-injector driver circuit switches the injectors on engine bank 1, the bank containing cylinder 1 on engines with multiple banks. The control module monitors how that driver circuit performs, and P062D sets when its operation falls outside the expected range; the code does not pinpoint one injector or driver component.

Common causes

Most likely first.

1. Open, shorted, or high-resistance injector wiring on bank 1
2. Poor injector or control-module connector contact
3. Fuel-injector driver circuit fault
4. Low or unstable module power or ground

Symptoms

• Check engine light on
• Misfire or rough idle on the affected cylinder
• Increased fuel consumption
• Possible fuel smell or smoke from exhaust

How to diagnose it

1. Save freeze-frame data and check for bank 1 misfire, injector-circuit, and voltage codes to identify the operating conditions and any affected cylinder.
2. Review misfire counts and injector command data for bank 1, then compare with the other bank where the scan tool supports it.
3. Inspect bank 1 injector connectors and harness routing for corrosion, loose pins, chafing, heat damage, or contamination.
4. Test bank 1 injector-driver wiring for opens, shorts, or excessive resistance using the manufacturer's isolation procedure.
5. Check control-module power and grounds under load, then test driver operation against the manufacturer's specification before replacing a module.

Common fixes

• Repair damaged or chafed bank 1 injector wiring.
• Clean and secure a loose or corroded bank 1 injector connector.
• Repair a poor control-module power or ground connection.
• Repair a confirmed bank 1 injector-driver circuit fault.
• Reprogram or replace the control module only when circuit and power checks confirm the need.

Can I keep driving?

If bank 1 is misfiring or the exhaust smells of fuel, avoid driving because unburned fuel can damage the catalytic converter. If the engine runs smoothly, keep the trip short and gentle, and stop if it begins to misfire or lose power.