DTC P2227-P2230 (LUJ)
Diagnostic Instructions
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
|
5V Reference
|
P0641, P2228
|
P2228
|
P0641, P2229
|
P2227
|
Signal
|
P2228
|
P2228
|
P2229
|
P2227
|
Low Reference
|
-
|
P2229
|
-
|
P2227
|
|
| |
Typical Scan Tool Data
BARO
Circuit
|
Short to Ground
|
Open
|
Short to Voltage
|
Operating Conditions: Ignition ON,
Engine OFF
Parameter Normal Range: 56-105 kPa,
varies with altitude
|
5V Reference
|
0 kPa
|
0 kPa
|
127 kPa
|
Signal
|
0 kPa
|
0 kPa
|
127 kPa
|
Low Reference
|
-
|
127 kPa
|
-
|
|
| |
Circuit/System Description
The barometric pressure (BARO) sensor responds to changes in
altitude and atmospheric conditions. This gives the engine control
module (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
| • |
DTCs P0068, P0101, P0102,
P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121,
P0122, P0123, P0222, P0223, P1516, P2135, P2228 and P2229 are not
set. |
| • |
DTCs P0106, P0107, P0108,
P2228, P2229 and P2230 are not set and are not pending.
|
| • |
Ignition ON, engine
OFF. |
| • |
DTC P2227 runs continuously
when the above conditions are met. |
P2228 or P2229
| • |
The DTCs run continuously when
the above condition is met . |
P2230
| • |
DTCs P0068, P0101, P0102,
P0103, P0106, P0107, P0108, P0112, P0113, P0117, P0118, P0121,
P0122, P0123, P0222, P0223, P1516, P2135, P2228 and P2229 are not
set. |
| • |
DTC P2230 runs continuously
when the above conditions are met. |
Conditions for Setting the DTC
P2227
| • |
Engine running, the ECM
detects that the difference between the BARO signal and the
calculated BARO is greater than 15 kPa (2.17 PSI) when the vehicle
has traveled no more than 0.5 km (0.31 mi) since the last
calculated BARO update, or if the difference is greater than 25 kPa
(3.62 PSI) when the vehicle has traveled greater than 0.5 km (0.31
mi) since the last calculated BARO update. |
| • |
Ignition ON, engine OFF, the
ECM detects that the BARO pressure is less than 50 kPa (7.25 PSI)
or greater than 115 kPa (16.76 PSI). |
P2228
The ECM detects that the BARO sensor voltage is less than 1.95 V
for greater than 4 s.
P2229
The ECM detects that the BARO sensor voltage is greater than 4.5 V
for greater than 4 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
(1.45 PSI) for less than 1 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 Barometric 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
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Verify that DTC P0641, P0697
or P063A is not set. |
| 2. |
Engine running observe the DTC
information with a scan tool. DTCs P2227, P2228, P2229, or P2230
should not set. |
| 3. |
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. |
Circuit/System Testing
| 1. |
Ignition OFF for 90 s,
disconnect the harness connector at the B17 Barometric Pressure
Sensor. |
| 2. |
Ignition OFF, test for less
than 5 Ω between the low reference circuit terminal 2 and
earth. |
| ⇒ |
If greater than the specified range, test the low
reference circuit for an open/high resistance. If the circuit tests
normal, replace the K20 Engine Control Module. |
| 3. |
Ignition ON, test for 4.8-5.2
V between the 5 V reference circuit terminal 1 and ground.
|
| ⇒ |
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 Engine Control
Module. |
| ⇒ |
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 Engine Control Module. |
| 4. |
Verify the scan tool BARO
Sensor parameter is less than 1 kPa. |
| ⇒ |
If greater than the specified range, test the
signal circuit terminal 3 for a short to voltage. If the circuit
tests normal, replace the K20 Engine Control Module. |
| 5. |
Install a 3 A fused jumper
wire between the signal circuit terminal 3 and the 5 V reference
circuit terminal 1. Verify the scan tool BARO Sensor parameter is
greater than 127 kPa. |
| ⇒ |
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 Engine Control Module. |
| 6. |
If the circuits test normal,
replace the B17 Barometric Pressure Sensor. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
