2010 Cadillac Truck SRX AWD V6-3.0L Page 2019

2010 Cadillac Truck SRX AWD V6-3.0L Page 2019

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.

P2230

* 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.

* DTC P2230 runs continuously when the above conditions are met.

Conditions for Setting the DTC

P2227

* The engine is running.

* The ECM detects that the difference between the BARO signal and the calculated BARO is greater than 15 kPa (2.2 psi) if the vehicle has

traveled at most 0.5 km (0.31 mi) since the last calculated BARO update, or the ECM detects that the difference between the BARO signal

and the calculated BARO is greater than 25 kPa (3.6 psi) if the vehicle has traveled greater than 0.5 km (0.31 mi) since the last calculated

BARO update.

OR

* Ignition ON, engine OFF

* The ECM detects that the BARO pressure is less than 50 kPa (7.3 psi) or greater than 115 kPa (16.7 psi).

P2228

The ECM detects that the BARO sensor voltage is less than 1.95 V for greater than 4 s.