Conditions for Setting the DTC

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

P0089

The high pressure fuel pump has exceeded the control limits. This condition exists when the Fuel Rail Pressure Regulator Command is 0° or greater than 92° for 12.5 s.

P00C6 Condition 1

If the Fuel Rail Pressure Sensor is less than the target set point before the engine is cranked, the pressure rise diagnostic is used.
The pressure rise diagnostic will fail if the Fuel Rail Pressure Sensor has not increased to the target set point within 9 s at -16°C (3.2°F) ECT or within 4 s if ECT is greater than 0°C (32°F).

P00C6 Condition 2

If the Fuel Rail Pressure Sensor is greater than the target set point before the engine is cranked, the pressure fall diagnostic is used.
The pressure fall diagnostic will fail if the Fuel Rail Pressure Sensor has dropped below 2 MPa (290 PSI) if the ECT is between -8°C (17.6°F) to -40°C (-40°F) or 0.6 MPa (87 PSI) if the ECT is greater than 0°C (32°F) for 3 engine cycles before the engine is running.

P228C

The actual fuel rail pressure is lower than the desired fuel rail pressure by a predetermined value for 12.5 s.

P228D

The actual fuel rail pressure is higher than the desired fuel rail pressure by a predetermined value for 12.5 s.

P2C1E

The high pressure fuel pump has exceeded the control limits during catalyst warm up. This condition exists when the Fuel Rail Pressure Regulator Command is 0° or greater than 92° for 12.5 s.

P2C1F

The actual fuel rail pressure is lower than the desired fuel rail pressure by a predetermined value for 12.5 s during catalyst warm up.

P2C20

The actual fuel rail pressure is higher than the desired fuel rail pressure by a predetermined value for 12.5 s during catalyst warm up.