P145D
DTC P145C or P145D
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P145C
- Evaporative Emission (EVAP) System Leak Detection Pump Stuck Off
DTC P145D
- Evaporative Emission (EVAP) System Leak Detection Pump Stuck On
Circuit/System Description
The evaporative emission (EVAP) system uses a EVAP leak detection pump to test for system leaks. The EVAP leak detection pump assembly consists of the following components:
* EVAP leak detection pump with reference orifice
* EVAP leak detection pump switching valve
* EVAP leak detection pump pressure sensor
The EVAP leak detection vacuum pump stuck off test is performed by comparing an initial stabilized EVAP leak detection pump pressure sensor, absolute, reading to a second stabilized reading for a short period of time.
The EVAP leak detection vacuum pump stuck on test is performed after the switching valve transitions from vent to not venting, pump, position. If after the second EVAP leak detection pump pressure sensor reading, a difference between the two pressure readings indicates the EVAP leak detection vacuum pump is stuck on.
Conditions for Running the DTC
P145C and P145D
* DTCs P043E, P043F, P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P012B, P012C, P012D, P0222, P0223, P0449, P0451, P0452, P0453, P0461, P0462, P0463, P0498, P0499, P0502, P0503, P06E4, P0722, P0723, P1221, P1458, P1459, P145A, P145C, P145D, P145E, P2066, P2067, P2068, P2400, P2401, P2402, P2418, P2419, P2420, P2421, P2422, P2450, P2537, P2610, U0073, U0074, U0140, U182D is not set.
* The propulsion system is not active
* The EVAP purge valve is closed
* The EVAP vent solenoid valve is closed
* The EVAP Leak Detection Pump switching valve is in the vent position
* The EVAP Leak Detection Pump vacuum pump is ON
* The odometer greater than 16 km (10 mi)
* The barometric pressure (BARO) is between 70-110 kPa (10-16 PSI)
* The fuel level is between 10-90%
* The engine coolant temperature is less than 40°C (104°F)
* The intake air temperature is between 4-45°C (39-113°F)
* The system voltage is greater than 10 V
* The vehicle speed is less than 1.6 km/h (1 MPH)
* No ignition key up during test
* The refueling request button is not pressed
* A service bay test is not active
* The device control is not active
* There are three possible time windows for this test to run. Up to that point and through this time period the propulsion system must not be active. These time windows are: 5.0, 7.0 or 9.5 hours
Conditions for Setting the DTC
P145C
The EVAP leak detection pump is commanded ON during the first reference orifice vacuum measurement and the stabilized EVAP leak detection pump pressure sensor vacuum reading is less than 0.1 kPa (0.01 PSI) for greater than 6 min.
Or
The EVAP leak detection pump is commanded ON during the second reference orifice vacuum measurement and the stabilized EVAP leak detection pump pressure sensor vacuum reading is less than 0.1 kPa (0.01 PSI) for greater than 30 s.
P145D
The EVAP leak detection pump is commanded OFF for the first time and the EVAP leak detection pump switching valve has transitioned from vent to not venting, pump position. The difference between an initial EVAP leak detection pump pressure sensor reading and a second EVAP leak detection pump pressure sensor reading is greater than 1 kPa (0.14 PSI) for greater than 8 s.
Or
The EVAP leak detection pump is commanded OFF for the second time and the EVAP leak detection pump pressure sensor vacuum reading is greater than 1.18 kPa (0.17 PSI) for greater than 14 s.
Action Taken When the DTC Sets
DTCs P145C and P145D are Type B DTCs.
Conditions for Clearing the DTC
DTCs P145C and P145D are Type B DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics [1][2]Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Evaporative Emission Control System Description Description and Operation
Hybrid Modes of Operation Description Hybrid Modes of Operation Description
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
* Vehicle in Service Mode, verify the scan tool parameter for the EVAP leak detection pump pressure compared against the conditions for setting.
• If found out of range proceed to Circuit/System Testing.
* Verify that DTCs P2400, P2401 or P2402 is not set.
• If any of the DTCs are set refer to Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions.
• If none of the DTCs are set.
* Inspect for any aftermarket devices added that might have spliced into wire harness circuits that control the EVAP leak detection pump.
* 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. If DTCs P2400, P2401 or P2402 are present repair these before proceeding, Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
2. If none of the above DTCs are present verify the scan tool parameter for the EVAP leak detection pump pressure.
• If found out of range, replace the Q63 evaporative emission system leak detection pump assembly.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Evaporative Emission System Vacuum Leak Detection Pump Replacement Service and Repair