2010 Cadillac Truck SRX FWD 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.
