Monday, August 16, 2021

2010 Cadillac Truck SRX AWD V6-3.0L Page 2016

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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