HA1 - Check For Other Codes

System Strategy:

Possible Causes:

- Fuel pressure.

- Fuel injector.

- Air intake.

- Manifold Absolute Pressure (MAP) sensor.

- Fuel injector electrical circuit.

- Fuel filter.

- Vacuum.

- Air filter.

- Are any other Diagnostic Trouble Codes (DTC) present?

Yes -- Service as required.

No -- Go to HA2. HA2 - Check Fuel Pressure