P2227

DTC P2227 Barometric Pressure (BARO) Sensor Performance

Circuit Description

The barometric pressure (BARO) sensor is installed inside of the ECM and converts the BARO into a voltage signal. The ECM uses this voltage signal to calibrate the fuel injection quantity and injection timing for altitude compensation. Within the ECM the diagnostic compares the BARO sensor input to the boost pressure sensor input. If the ECM detects that the inputs are not within a specified amount of each other this DTC will set.

Condition for Running the DTC

^ DTCs P0079 P0080 P0102 P0103 P0116 P0117 P0118 P0237 P0238 P02E9 P02E8 P0500 P0506 P0507 P0602 P0642 P0643 P1125 P2228 P2229 and P268A are not set.
AND following conditions are met for longer than 3 seconds.
^ The battery voltage is between 10 to 16 volts.
^ The ignition switch is ON.
^ The engine runtime is longer than 30 seconds.
^ The engine speed is between 600 to 850 RPM and does not vary more than 30 RPM.
^ The vehicle is not running.
^ The accelerator pedal is not depressed.
^ The engine coolant temperature is more than 68°F (20°C).
^ The intake airflow valve position is more than 85%.
^ The turbocharger control is under normal operation.
^ The exhaust brake valve is commanded OFF.
^ The DPF regeneration is not running.

Condition for Setting the DTC

^ The ECM detects that the differential pressure between the BARO and the boost pressure is more than 1.1 psi (7.5 kPa) for longer than 5 seconds.

Action Taken When the DTC Sets

^ The ECM illuminates the MIL when the diagnostic runs and fails. Refer to DTC Type Definitions for Action Taken When the DTC Sets - Type B.
^ The ECM inhibits EGR control.
^ The ECM inhibits DPF regeneration control.

Condition for Clearing the DTC

^ Refer to DTC Type Definitions for Condition for Clearing the MIL/DTC - Type B.

Diagnostic Aids

^ If an intermittent condition is suspected refer to Intermittent Conditions in this section.

Circuit/System Testing DTC P2227