DTC P2228 or P2229
Diagnostic Instructions
DTC Descriptors
| DTC P2228 00: Barometric Pressure (BARO)
Sensor Circuit Low Voltage |
| DTC P2229 00: Barometric Pressure (BARO)
Sensor Circuit High Voltage |
Circuit/System Description
The barometric pressure (BARO) sensor is integrated within the
engine control module (ECM). The BARO sensor responds to changes in
altitude and atmospheric conditions. The BARO sensor provides the
ECM an indication of barometric pressure. The BARO sensor provides
a voltage signal to the ECM relative to the atmospheric pressure
changes. The ECM monitors the BARO sensor signal for a voltage
outside of the normal range.
Conditions for Running the DTC
The ignition is ON or the engine is running.
Conditions for Setting the DTC
P2228 00
| • |
The ECM detects that the BARO
sensor voltage is less than 2.1 V. |
| • |
The condition exists for
greater than 1.5 s. |
P2229 00
| • |
The ECM detects that the BARO
sensor voltage is greater than 4.7 V. |
| • |
The condition exists for
greater than 1.5 s. |
Action Taken When the DTC Sets
DTCs P2228 and P2229 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P2228 and P2229 are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Engine running, observe the
DTC information with a scan tool. DTCs P2228 or P2229 should not
set. |
| 2. |
Operate the vehicle within the
Conditions for Running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the Freeze Frame/Failure Records data. |
Circuit/System Testing
| 1. |
Inspect the atmospheric vent
on the K20 Engine Control Module case for one of the following
conditions: |
| |
• |
Moisture in the vent
inlet |
| |
• |
Debris in the vent
inlet |
| ⇒ |
If a condition exists, attempt to clean or dry the
atmospheric inlet. |
| 2. |
Engine running, observe the
DTC information with a scan tool. DTCs P2228 or P2229 should not
set. |
| ⇒ |
If DTC P2228 or P2229 sets, replace the K20 Engine
Control Module. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
Control Module References for engine control module
replacement, setup and programming
|
