Diagnostic Aids
WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
- A weak battery, low component/system voltage, or poor connections may cause this DTC to set.
- Aftermarket components to improve performance may cause a DTC to set.
- This Diagnostic parameter is stored in the ECM over a period of time. Time to set this DTC may take several drive cycles.
- A restricted, kinked, or damaged fuel supply line including restricted fuel filter may cause this DTC to set.
- Water or contaminated fuel may cause this DTC to intermittently set. Refer to Contaminants-in-Fuel Diagnosis .
- When ambient temperatures are below 0°C (32°F), the fuel tank pickup screen may be iced over from water in the fuel tank.