DTC P0440 Evaporative Emission (EVAP) System. Oldsmobile Intrigue 2000

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 2000 🢒 Intrigue 🢒 Engine 🢒 Engine Controls - 3.5L 🢒 DTC P0440 Evaporative Emission (EVAP) System

Table 1:

System Description

The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or the vacuum level decreases too rapidly, this DTC sets.

The following table illustrates the relationship between the ON and OFF states, and the OPEN or CLOSED states of the EVAP canister purge and vent valves.

Control Module Command	EVAP Canister Purge Valve	EVAP Canister Vent Valve
ON	Open	Closed
OFF	Closed	Open

Conditions for Running the DTC

•	DTCs P0107, P0108, P0110, P0112, P0113, P0115, P0116, P0117, P0118, P0121, P0122, P0123, P0125, P0443, P0449, P0452, P0453, P1106, P1107, P1111, P1112, P1114, P1115, P1121, or P1122 are not set.

•	The system voltage is between 10-18 volts.

•	The engine coolant temperature (ECT) is between than 4-30°C (39-86°F).

•	The intake air temperature (IAT) is between than 4-30°C (39-86°F).

•	The fuel tank level is between 15-85 percent.

•	The barometric pressure (BARO) is more than 75 kPa.

•	The vehicle speed sensor (VSS) is less than 121 km/h (75 mph).

•	The start-up ECT and IAT are within 9°C (16°F).

Conditions For Setting the DTC

The EVAP system is not able to achieve or maintain a vacuum during the diagnostic test.

Action Taken When the DTC Sets

•	The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.

•

The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC

•	The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.

•	A current DTC, Last Test Failed, clears when the diagnostic runs and passes.

•	A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.

•	Clear the MIL and the DTC with a scan tool.

Diagnostic Aids

•	Use the J 41413 EVAP Pressure and Purge Station in order to pressurize the EVAP system. Move all EVAP components while testing with the J 41416 Ultrasonic Leak Detector.

•	A temporary blockage in the EVAP canister purge valve, the purge pipe, or the EVAP canister could cause an intermittent condition. To repair a blockage in the EVAP system refer to Evaporative Emission System Cleaning .

•	Reviewing the Freeze Frame/Failure Records, vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

This step is used to verify if a leak is present.

This step verifies proper operation of the fuel tank pressure (FTP) sensor.

This step tests the EVAP canister purge valve for a restriction or blockage.

DTC P0440

Step

Action

Values

Yes

Did you perform the Diagnostic System Check-Engine Controls?

Go to Step 2

Go to Powertrain On Board Diagnostic (OBD) System Check

Does the scan tool indicate DTC P0443 or DTC P0449 are also set?

Go to Surges/Chuggles

Go to Step 3

Inspect the evaporative emission (EVAP) system for the following conditions:

•	Loose, missing, or damaged service port schrader valve

•	Loose, incorrect, missing, or damaged fuel fill cap

•	A damaged EVAP canister purge valve

Raise the vehicle on a hoist. Refer to Lifting and Jacking the Vehicle in General Information.
Inspect the EVAP system for the following conditions:

•	Disconnected, improperly routed, kinked, or damaged EVAP pipes and hoses

•	A damaged EVAP canister vent valve or EVAP canister

Did you find and correct the condition?

Go to Step 18

Go to Step 4

With a scan tool, capture and record the Fail Record data and clear the DTCs.
Perform the Service Bay Test. Refer to Service Bay Test .

Does the scan tool indicate that the Service Bay Test passed?

Go to Diagnostic Aids

Go to Step 5

Important: Always zero the EVAP pressure and vacuum (in H2O) gages on the J 41413 EVAP Pressure and Purge Station before proceeding with diagnosis.

Install the J 41415-40 Fuel Tank Cap Adaptor.
Connect the J 41413 EVAP Pressure and Purge Station to the J 41415-40 .
Turn ON the ignition, with the engine OFF.
Seal the EVAP system with a scan tool.
Pressurize the system to the specified value with the J 41413 .
Rotate the J 41413 rotary switch to the OFF/HOLD position.
Monitor the J 41413 pressure gage.

Did you obtain and hold the specified value?

5 in H2O

Go to Step 6

Go to Step 8

Compare the J 41413 value to the scan tool fuel tank pressure (FTP) sensor value.

Does the J 41413 value measure near the scan tool value?

Go to Step 7

Go to Step 12

Monitor the pressure gage on the J 41413 EVAP Pressure and Purge Station.
Disconnect the EVAP purge pipe from the EVAP purge valve.

Does the EVAP system pressure decrease?

Go to Step 9

Go to Step 10

Continuously pressurize the EVAP system with the J 41413 .

Important: It may be necessary to partially lower the fuel tank to inspect components located in the upper portion of the tank.

Inspect for leaks with the J 41416 Ultrasonic Leak Detector in the following locations:

•	The EVAP system purge pipe

•	The EVAP vapor pipe

•	The EVAP vent hose/pipe--Refer to Evaporative Emission Vent Valve Replacement .

•	The fuel fill pipe/hose and fuel fill cap

•	The EVAP canister--Refer to Evaporative Emission Canister Replacement .

•	The EVAP canister vent valve--Refer to Evaporative Emission Vent Valve Replacement .

•	The EVAP canister purge valve--Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .

•	The fuel sender assembly and/or seal--Refer to Fuel Sender Assembly Replacement .

•	The fuel tank pressure (FTP) sensor seal--Refer to Fuel Tank Pressure Sensor Replacement .

•	The fill limiter vent valve, pressure relief valve, rollover valves, permanent EVAP pipes and/or fuel tank--Refer to Fuel Tank Replacement .

Did you locate and repair a leak?

Go to Step 18

Go to Diagnostic Aids

Attach a vacuum gage to the EVAP purge valve purge pipe port.
Start the engine and allow to idle.
Command the EVAP purge valve to 50 percent with a scan tool.

Does the vacuum gage show an increase in vacuum?

Go to Diagnostic Aids

Go to Step 15

Monitor the pressure gage on the J 41413 .
Disconnect the purge pipe at the EVAP canister.

Does the EVAP system pressure decrease?

Go to Step 16

Go to Step 11

Monitor the pressure gage on the J 41413 .
Disconnect the EVAP vapor line from the EVAP canister.

Does the EVAP system pressure decrease?

Go to Step 17

Go to Step 14

Monitor the fuel tank pressure (FTP) sensor voltage with a scan tool.

Is the FTP sensor voltage more than the specified value?

4.3 V

Go to DTC P0453 Fuel Tank Pressure Sensor Circuit High Voltage

Go to Step 13

Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement .

Did you complete the replacement?

Go to Step 18

Repair for a pinched or obstructed EVAP vapor pipe.

Did you complete the repair?

Go to Step 18

Replace the EVAP canister purge valve. Refer to Evaporative Emission Canister Purge Solenoid Valve Replacement .

Did you complete the replacement?

Go to Step 18

Repair the restriction in the EVAP purge pipe. Refer to Evaporative Emission System Cleaning .

Did you complete the repair?

Go to Step 18

Replace the EVAP canister. Refer to Evaporative Emission Canister Replacement .

Did you complete the replacement?

Go to Step 18

With a scan tool, capture and record the Fail Record data and clear the DTCs.
Perform the Service Bay Test. Refer to Service Bay Test .

Does the scan tool indicate that the Service Bay Test passed?

Go to Step 19

Go to Step 5

Observe the stored information in Capture Info. with a scan tool.

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List/Type

System OK