2010 Cadillac Truck SRX AWD V6-3.0L Page 2016
P2229
DTC P2227-P2229 or P2230 (LF1, LFW)
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P2227
- Barometric Pressure (BARO) Sensor Performance
DTC P2228
- Barometric Pressure (BARO) Sensor Circuit Low Voltage
DTC P2229
- Barometric Pressure (BARO) Sensor Circuit High Voltage
DTC P2230
- Barometric Pressure (BARO) Sensor Circuit Erratic
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The barometric pressure (BARO) sensor is integral to the throttle inlet absolute pressure sensor and responds to changes in altitude and atmospheric
conditions. This gives the ECM an indication of barometric pressure. The ECM uses this information to calculate fuel delivery. 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
P2227
* DTC P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0222, P0223, P1516,
P2135, P2228, or P2229 is not set.
* The engine is running.
OR
* DTC P0106, P0107, P0108, P2228, P2229, or P2230 is not set and not pending.
* Ignition ON, engine OFF
* DTC P2227 runs continuously when the above conditions are met.
P2228 or P2229
* The engine is running.
* The DTCs run continuously when the above condition is met.
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