Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0016, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0116, P0117, P0118, P0120, P0122, P0123, P0128, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0220, P0222, P0223, P0300, P0301-P0308, P0315, P0335, P0336, P0340, P0341, P0403, P0404, P0502, P0503, P0601, P0602, P0603, P0604, P0606, P060D, P062F, P0641, P0651, P1404, P2135 are not set.
The Ignition 1 signal parameter is between 11-18 volts.
The Current Gear parameter does not change.
The Intake Air Temperature (IAT) sensor parameter is less than 100°C (212°F).
The Engine Coolant Temperature (ECT) sensor parameter is between 5-150°C (41-230°F).
The Engine Speed parameter is between 1,000-1,800 RPM.
The Manifold Absolute Pressure (MAP) sensor parameter is between 11-50 kPa.
The Mass Air Flow (MAF) sensor parameter does not change more than 2 grams per second.
The Barometric Pressure (BARO) parameter is more than 74 kPa.
The Throttle Position (TP) sensor parameter is less than 1.19 percent.
The Vehicle Speed sensor parameter is more than 37 km/h (23 mph) during deceleration.
The vehicle will need to be driven more than 80 km/h (50 mph), and then allowed to decelerate. When the vehicle is decelerating, while meeting all of the criteria listed above, the ECM will enable the EGR flow test to run. As the EGR flow test is running, you will see the Desired EGR Position parameter and the EGR Position Sensor parameter on the scan tool momentarily change from 0 to a calibrated value above 0. Additionally, the EGR Flow Test Count parameter on the scan tool will increment when each EGR flow test is completed.
DTC P0401 runs once per trip typically, or 7 tests will be run per trip until 42 tests have been completed.