Conditions for Setting the DTC

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.

NOTE:

There are two stages to setting this DTC. Stage one, prep test, then stage two test.

Fuel Tank Pressure Sensor = Less than -3 kPa (-22.5 mmHg, -12.06 in. H2O) - For 5 s
Fuel Tank Pressure Sensor = Less than -1.24 kPa (-9.3 mmHg, -4.98 in. H2O) - For greater than 60 s
Fuel Tank Pressure Sensor = Greater than 0.62 kPa (4.65 mmHg, 2.49 in. H2O) - For greater than 60 s
After setting the DTC for the first time, 2 L (0.5 gal) of fuel must be consumed before setting the DTC for the second time.