P145E
DTC P145E
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 P145E
- Evaporative Emission (EVAP) System Leak Detection Pump to Vent Solenoid Valve Leak Detected
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
This DTC sets when the ECM detects with a leak 0.51 mm (0.020 in) between the EVAP leak detection pump and the EVAP vent solenoid valve.
Conditions for Running the DTC
* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0111, P0112, P0113, P0114, P0116, P0117, P0118, P0119, P0121, P0122, P0123, P0128, P012B, P012C, P012D, P0222, P0223, P0449, P0452, P0453, P0461, P0462, P0463, P0498, P0499, P0502, P0503, P06E4, P0722, P0723, P1221, P1459, P145A, P2066, P2067, P2068, P2400, P2401, P2402, P2418, P2419, P2420, P2537, P2610, U0073, U0074, U0140, U182D, P043E, P043F, P0451, P1458, P145C, P145D and P2450 is not set
* The EVAP purge valve is closed.
* The EVAP vent solenoid valve transitions to closed.
* The EVAP leak detection pump switching valve in not venting, pump 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 this 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
The ECM detects, the vacuum reading is less than the reference vacuum for greater than 30 s.
Action Taken When the DTC Sets
DTC P145E is a Type B DTC.
Conditions for Clearing the DTC
DTC P145E is a Type B DTC.
Diagnostic Aids
* The EVAP system can be filled with smoke at the fresh air side of the vacuum pump using the adapters in the GE-41413-300 - cap and plug kit and J-41413-320 - cap and plug kit.
* Smoke seen coming out of the fresh air side of the EVAP leak detection pump assembly is not consider a failed part. This includes the electrical connection port as diagnostics will not detect a leak on the fresh air side of the system.
* To help locate intermittent leaks, use the GE-41413-A - evaporative emissions system tester to introduce smoke into the EVAP system. Move all the EVAP components while observing for smoke with a high intensity white light.
* To improve the visibility of the smoke exiting the EVAP system, observe the suspected leak area from different angles with the GE-41413-SPT - high intensity white light.
* If a small leak is difficult to find, it may be necessary to remove the EVAP components and test them one at a time using the adapters in the GE-41413-300 - cap and plug kit or J-41413-320 - cap and plug kit.
* 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.
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
Special Tools
* GE-41413-300 - EVAP Cap And Plug Kit
* GE-41413-A - Evaporative Emissions System Tester (EEST)
* GE-41413-SPT - High Intensity White Light
* J-41413-320 - EVAP Cap And Plug Kit
For equivalent regional tools, refer to Special Tools (Diagnostic Tools) Special Tools (Diagnostic Tools).
Circuit/System Verification
Warning: Refer to Fuel and Evaporative Emission Pipe Warning Fuel and Evaporative Emission Pipe Warning.
Caution: Refer to Clean, Dry, Low Pressure Gas Source Caution Clean, Dry, Low Pressure Gas Source Caution.
1. Verify the following conditions do not exist in the EVAP system:
* Disconnected, incorrectly routed, kinked, or damaged EVAP pipes, O rings and hoses.
* A damaged EVAP vent solenoid valve.
• If you find any of the above conditions, repair as necessary.
Caution: Refer to Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution Fuel and Evaporative Emission Hose/Pipe Connection Cleaning Caution.
Note: Refer to the GE-41413-A - evaporative emissions system tester operation manual for detailed instructions in Evaporative Emission Control System Diagnosis Evaporative Emission Control System Diagnosis
2. Disconnect the fresh air tube at the quick connector on the Q63 evaporative emission system leak detection pump (ELDP) and using adapters in the J-41413-320 - cap and plug kit , specifically GE 41413-323, connect the GE-41413-A - evaporative emissions system tester
Note: Ensure that the vehicle underbody temperature is similar to the ambient temperature and allow the surrounding air to stabilize before starting the diagnostic procedure. The system flow will be less with higher temperatures.
3. Use the flow meter on the GE-41413-A - evaporative emissions system tester calibrated to 0.51 mm (0.020 in) determine if there is a leak in the evaporative emission system. Compare the flow meter's stable floating indicator position to the red flag. The floating indicator should be below the red flag.
• If a leak is detected, use the GE-41413-A - evaporative emissions system tester to apply smoke to the EVAP system until the leak is located following the Evaporative Emission Control System Diagnosis Evaporative Emission Control System Diagnosis
4. 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. Note and record the Evaporative Emission (EVAP) System Leak Detection Pump (ELDP) pressure from the scan tool data.
2. Command the ELDP pump on for 1 min. with the scan tool output control. Note and record the ELDP pressure.
3. Subtract the value in step 2 from the value in step 1 and record this.
4. Command the Evaporative Emission (EVAP) System Leak Detection Pump to Vent Solenoid Leak test from the scan tool output controls for 30 s. Note and record the value.
5. Subtract the value in step 4 from the value recorded in step 1.
* Example: Step 1 value 96.6 kPa (14 PSI)
* Example: Step 2 value 93.5 kPa (13.6 PSI)
* Example: Step 3 value 3.1 kPa (0.4 PSI)
* Example: Step 4 value 90.69 kPa (13.15 PSI)
* Example: Step 5 value 5.91 kPa (0.8 PSI)
6. The recommended ratio should be at least 1.50 of the value in step 3.
* Example; step 1 minus step 4 = 5.91 kPa (0.85 PSI)
* 5.91 kPa (0.85 PSI) divided by 3.1 (0.44 PSI) = 1.90 ratio.
• If the ratio meets or exceeds the recommendation then All OK.
• If the ratio fails the recommendation, inspect and repair for any of the conditions noted under verification, step 1.
Component Testing
1. Using GE-41413-A - evaporative emissions system tester with adapter J-41413-323 that is part of J-41413-320 - cap and plug kit connected to the fresh air side of the Q63 evaporative emission system leak detection pump test the connection between the Q13 evaporative emission vent solenoid valve and the Q63 evaporative emission system leak detection pump for a leak. The value should be below 0.020 in, the value established above in verification step 3.
Note: Smoke seen coming out of the fresh air side of the EVAP leak detection pump assembly is not consider a failed part. This includes the electrical connection port as diagnostics will not detect a leak on the fresh air side of the system.
• If a leak is detected repair the affected component.
2. Test for no air flow through the Q13 evaporative emission vent solenoid valve by applying vacuum to the pump side of the valve. It should hold 1-2 in. Hg (3-7 kPa) for 30 s.
• If not within the specified range, replace the Q13 evaporative emission vent solenoid valve.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure
* Evaporative Emission Control Valve Vacuum Hose Replacement Service and Repair
* Evaporative Emission System Vacuum Leak Detection Pump Replacement Service and Repair
* Evaporative Emission Canister Vent Solenoid Valve Replacement Service and Repair