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DTC P2227-P2229 or P2230

Diagnostic Instructions
    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    •  Review Strategy Based Diagnosis for an overview of the diagnostic approach.
    • 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

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.
    • Engine is running.
        OR
    • 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 engine is running.
    • The DTCs run continuously when the above condition is met.

P2230

    • The engine is running.
    • 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 travelled 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 travelled 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

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

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. ⇒If any of the above DTCs are set, refer to DTC P0641, P0651, P0697, or P06A3 .
  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 ground.
    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 Engine Control Module.
  3. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
    4. ⇒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.
    5. ⇒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.
    6. ⇒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.

Control Module References for engine control module replacement, setup, and programming

   


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