Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
- Review the freeze frame data to determine if the engine was running when the DTC set.
- Connector terminal fretting or poor connections of the wiring harness may cause this DTC to set.
- Contaminated fuel may cause this DTC to set.
- Contaminates trapped in the filter screen of fuel pressure regulator 2 may cause this DTC to set.
- Post Drive Mode failures are most likely an electrical concern.
- Idle Mode failures are most likely a hydraulic (fuel) or mechanical concern.
- Erosion or damage of the mating surface between Q18B Fuel Pressure Regulator 2 and the fuel rail may cause this DTC to set.
- Improper fuel pressure regulator 2 torque may cause this DTC to set.
- High current flow at Fuel Pressure Regulator 2 may be caused by the following. Listed in order from most probable to least probable.
- Leaking Fuel Pressure Regulator 2 due to improper torque.
- Skewed Fuel Rail Pressure Sensor.
- Low flow at Fuel Pressure Regulator 1.
- Fuel Injector high flow.
- External fuel leakage in high-pressure circuit.
- Low current flow at Fuel Pressure Regulator 2 may be caused by the following. Listed in order from most probable to least probable.
- Restricted Fuel Pressure Regulator 2 - Plugged Filter Screen.
- Skewed Fuel Rail Pressure Sensor.
- High flow at Fuel Pressure Regulator 1.