PRE-RELEASE
DTC P2227-P2229 or P2230
| DTC P2227-P2229 or P2230 |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| 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 |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
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5 V Reference
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P0651, P2227, P2228
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P2228
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P0651, P2229
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P2227, P2230
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Signal
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P2227, P2228
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P2227, P2228
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P2227, P2229
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P2227, P2230
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Low Reference
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-
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P2227, P2229
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-
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P2227, P2230
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| Typical Scan Tool Data |
BARO
| Circuit | Short to Ground | Open | Short to Voltage |
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Operating Conditions:
Ignition ON, Engine OFF
Parameter Normal Range: 56-105 kPa (8.1-15.2 psi), varies with altitude |
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5 V Reference
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0 kPa (0 psi)
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0 kPa (0 psi)
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127 kPa (18.4 psi)
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Signal
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0 kPa (0 psi)
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0 kPa (0 psi)
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127 kPa (18.4 psi)
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Low Reference
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-
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127 kPa (18.4 psi)
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-
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| 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. It gives the ECM an indication of barometric pressure. The ECM uses this information to calculate the fuel blend. The BARO sensor supplies a voltage signal to the ECM relative to the variations in atmospheric pressure. The ECM monitors the BARO sensor signal for a voltage outside of the normal range.
| Conditions for Running the DTC |
P2227
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DTC P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0222, P0223, P2101, P2135, P2228, or P2229 is not set.
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The engine is running.
OR |
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DTC P0106, P0107, P0108, P0237, P0238, P2228, P2229, P2230, or P2610 is not set or pending.
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The ignition is ON, the engine is OFF.
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The time between current ignition cycle and the last time the engine was running is greater than 10 s.
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DTC P2227 runs continuously when the above conditions are met.
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P2228 or P2229
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The engine is running.
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The DTCs run continuously when the above condition is met.
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P2230
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DTC P0068, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0222, P0223, P2101, P2135, P2228, or P2229 is not set.
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The engine is running.
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DTC P2230 runs continuously when the above conditions are met.
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| Conditions for Setting the DTC |
P2227
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Engine running, the ECM detects that the difference between the BARO signal and the calculated BARO is greater than 15 kPa (2.2 psi) when the vehicle has traveled no more than 0.6 km (0.4 mi) since the last calculated BARO update, or if the difference is greater than 20 kPa (2.9 psi) when the vehicle has traveled greater than 0.6 km (0.4 mi) since the last calculated BARO update.
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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).
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P2228
The ECM detects that the BARO sensor voltage is less than 1.7 V for greater than 5 s.P2229
The ECM detects that the BARO sensor voltage is greater than 4.5 V for greater than 5 s.P2230
The ECM detects that the difference between the current BARO sensor reading and the previous BARO sensor reading is greater than 10 kPa (1.5 psi) for greater than 5 s.| Action Taken When the DTC Sets |
DTCs P2227, P2228, P2229, and P2230 are Type B DTCs.
| Conditions for Clearing the DTC |
DTCs P2227, P2228, P2229, and P2230 are Type B DTCs.
| Diagnostic Aids |
Inspect the inlet port on the BARO sensor (throttle inlet absolute pressure sensor) for moisture or debris and attempt to dry or clean the inlet, if contaminated.
| Reference Information |
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Verification |
| 1. |
Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0641 or P0651 is not set.
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| 2. |
If a DTC is set, refer to
Diagnostic Trouble Code (DTC) List - Vehicle
for further diagnosis.
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| 3. |
Ignition ON, observe the scan tool BARO parameter. Compare the parameter to the
Altitude Versus Barometric Pressure
table. The parameter should be within the specified range indicated in the table.
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| 4. |
With the engine running, check the DTC Information with the scan tool. DTC P2227, P2228, P2229, or P2230 should not be set.
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| 5. |
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.
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| Circuit/System Testing |
| 1. |
Ignition OFF, disconnect the harness connector at the P192 throttle inlet absolute pressure sensor.
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| 2. |
Ignition OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for less than 5 Ω between the low reference circuit terminal 2 or B and ground.
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| 3. |
If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 4. |
Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 or A and ground.
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| 5. |
If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 6. |
If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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Verify the scan tool BARO Sensor parameter is less than 1 kPa (0.2 psi).
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| 8. |
If greater than the specified value, test the signal circuit terminal 3 or C for a short to voltage. If the circuit tests normal, replace the K20 ECM.
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| 9. |
Install a 3 A fused jumper wire between the signal circuit terminal 3 or C and the 5 V reference circuit terminal 1 or A. Verify the scan tool BARO Sensor parameter is greater than 127 kPa (18.4 psi).
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| 10. |
If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K20 ECM.
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| 11. |
If the circuits test normal, replace the P192 throttle inlet absolute pressure sensor.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Throttle Inlet Absolute Pressure Sensor Replacement
for BARO sensor replacement.
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Control Module References
for Engine Control Module replacement, setup, and programming
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