WS6FirebirdTA00

iTrader: (33)

actually 2 of these codes where up, same number, when i looked at it. it came on today going around the block. i cleaned the engine bay yesterday and put a drive shaft in today. i did a fuel pump change but the car was driven about 50-100 miles since then. after i cleaned the engine bay, the car was moved around for a little bit and only drove around the block once. could it just be something got wet? like the litlte service port up on the manifold, or whatever that is? i figured it would have to be something related to what was done recently because it should have come on sooner if it was from anything else.


just let me know guys, thanks

WS6FirebirdTA00

iTrader: (33)

and the last time gas was put in the car was last thurs and i made 5 passes at the drag strip thats 20 miles away and the light never came on, so i dont think its a gas cap, but i checked it out anyway

Green Thunder

iTrader: (11)

P0442 Is a evap code:
Enhanced Evaporative Emission tests may be performed by the vehicle's module when specific conditions are met. These conditions are determined by the calibration within the module.

When the key is turned to the start or run position, the module checks the output of various sensors on the vehicle to determine when and if the Evaporative Emissions tests should be run.

Some of the most widely used parameters are listed below:

The Barometric Pressure (BARO) is greater than a specified kPa (psi).
The system voltage is between 10 and 18 volts.
The intake air temperature (IAT) is within specified temperature values.
The engine coolant temperature (ECT) is within specified temperature values.
The ECT and IAT are within specified temperatures of each other when the vehicle engine was started.
The fuel level sensor indicates the fuel level is greater than a specified % of empty and less than a specified % of full. (For a 76 L (20 gal) fuel tank, a fuel level of more than 11 L (3 gal) but less than 64 L (17 gal) or as specified in the calibration).

For the ECT and IAT to be within the specified temperatures of each other at the time of engine start-up, the engine will have to be in the non-running condition for a long enough period of time for the engine coolant temperature to drop from its normal operating temperature down to roughly 30°C (90°F). This could take several hours.

When the control module determines that the above conditions are met, the module tests for a leak in the EVAP system by:

• Electrically closing the vent valve in order to seal the system.

• Electrically opening the purge valve which allows the running engine to draw a vacuum on the fuel tank.

• The module then closes the purge valve, resealing the system.

• The module then monitors the fuel tank pressure sensor and determines:

- If vacuum was achieved.

- If a leak is present, how large the leak is.

- If vacuum was not achieved.

• If one of the above tests fails, the module remembers that the system failed the test.

• If the module sees a failure of the EVAP test for two consecutive tests, the module will set a trouble code for EVAP leak (DTCs P0440, P0442, or P0446).

Hope this helps...

WS6FirebirdTA00

iTrader: (33)

thanks for all the info, some good stuff.

Green Thunder

iTrader: (11)

No problem.. Here is some info on how to diagnose it:

Conditions for Running the DTC

• Vehicle speed less than 70 mph

• TP sensor angle less than 75 percent.

• The barometric pressure is more than 75 kPa.

The fuel level is between 15 percent and 85 percent of full capacity.

The engine coolant temperature is between 39°F and 86°F

The intake air temperature is between 39°F and 86°F

The start up engine coolant temperature and intake air temperature are within 16°F of each other.

Conditions for Setting the DTC
The vacuum in the EVAP system leaks at too fast a rate.

Important: This DTC does NOT report a first failed test. A first fail of this DTC will have a scan tool status as Not Run. Use the scan tool data display parameter of EVAP Test Result to determine if this DTC has failed or passed for this ignition cycle.


Perform a physical inspection of the EVAP system. Inspect for the following conditions:

A loose, missing, defective, or incorrect fuel tank cap

Incorrectly routed or defective EVAP system vacuum and vapor lines

A malfunctioning or damaged vapor canister

A damaged fuel sender O-ring

Inspect for charcoal release from the vapor canister. Refer to Evaporative Emission (EVAP) System Cleaning procedure.

The Service Bay Test may have to be performed in cold ambient air temperatures when the vehicle is running a winter grade fuel. The scan tool displays amessage when the service bay test does not run.

The battery voltage is between 10.5 and 17.5 volts.

The fuel level is between 15 percent and 85 percent of the full capacity.

The engine temperature is between 3.5°C (38°F) and 35°C (95°F).

The scan tool displays Test Aborted if any of the above conditions are not met.

Test Description
The numbers below refer to the step numbers on the Diagnostic Table.

A fuel tank cap that is loose or off causes this DTC to set.

If the Service Bay Test can not be run, proceed to step 5. If a fault is not currently present the diagnostic table steps will return you to step 3.

This step tests for a leak at the top of the fuel tank, at the fuel filler hose, and the fuel cap. Place the ultrasonic leak detector in these areas. Refer to the information supplied with the EVAP pressure/purge diagnostic cart on proper setup and adjustment procedures.

With pressure applied it may be necessary to disconnect the EVAP lines at the components to verify that a line or component is not restricted. Arestrictionwould preventavacuum (or the Step 10 test pressure) from forming in the fuel tank.

A Fuel Tank Pressure sensor that does not correctly respond to pressure (orvacuum) causes this DTC to set.

The Fuel Tank Pressure sensor range is from 7.5 in. H2O of pressure to -17.5 in. H2O of pressure (vacuum).

DTC P0440 and P0442 Step
Action
Value(s)
Yes
No

1
Did you perform the Powertrain On-Board Diagnostic (OBD) System Check?
--
Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

2
Are any other EVAP system DTC's stored in history?
--
Go to the applicable DTC table
Go to Step 3

3
Inspect the EVAP system for the following conditions:
- A loose, incorrect, defective or missing fuel tank cap.

- Disconnected, improperly routed, kinked or damaged EVAP system purge lines.

- A damaged EVAP system component.

- A loose, missing, or damaged service port dust cap and/or schrader valve. Refer to the test description for additional information.

Repair the EVAP system if needed.
Did you find and repair the condition?
--
Go to Step 21
Go to Step 4

4
Important: Ensure that The Conditions for Running the Service Bay test are met before proceeding with this diagnostic. Refer to Diagnostic Aids.


Perform the EVAP system Service Bay Test using a scan tool.

Does the EVAP diagnostic pass the Service Bay Test?
--
Go to Diagnostic Aids
Go to Step 5

5
Important: The DTCs must be cleared from the PCM in order to use the output control function on the scan tool.


Clear the DTCs using a scan tool.
Turn OFF the ignition.
Remove the EVAP Purge line from the EVAP Purge Solenoid Valve.
Connect the J 23738-A hand held vacuum pump to the vacuum port of the EVAP Purge Solenoid Valve.
Attempt to apply a vacuum up to the specified value using the hand vacuum pump.
Can the value specified be obtained and held?
10 in Hg
Go to Step 6
Go to Step 15

6
Important: If an audible solenoid click cannot be heard and DTC P0443 is not set, inspect the EVAP canister purge solenoid circuits for high resistance.


Connect a vacuum gauge to the EVAP Purge solenoid valve.
Idle the engine.
Command the EVAP Purge Solenoid Valve to 50% using a scan tool.
Is the vacuum measured on the gauge the same or more than the specified value?
12 in Hg
Go to Step 8
Go to Step 7

7
Turn OFF the ignition.
Remove the vacuum source from the EVAP Purge Solenoid.
Connect a vacuum gauge to the vacuum source.
Idle the engine.
Is the vacuum measured on the gauge the same or more than the specified value?
12 in Hg
Go to Step 15
Go to Step 14

8
Turn OFF the ignition.
Reconnect the EVAP purge line to the EVAP purge solenoid.
Lower the fuel tank to gain access to the EVAP canister. Refer to Evaporative Emission (EVAP) Canister Replacement .
Disconnect the EVAP purge line from the EVAP Canister (line from the EVAP purge solenoid valve).
Connect the J 23738-A vacuum pump to the EVAP purge line from the EVAP purge solenoid valve.
Using the J 23738-A vacuum pump, attempt to apply a vacuum up to the specified value.
Can the specified value of vacuum be obtained and held?
5 in Hg
Go to Step 9
Go to Step 18

9
Turn OFF the ignition.
Disconnect the fuel tank vapor line from the EVAP Canister.
Plug the EVAP canister port for the fuel tank vapor line.
Connect the J 23738-A vacuum pump to the EVAP purge port on the EVAP canister.
Turn ON the ignition.
Command the EVAP Vent Valve ON (closed) using a scan tool.
Using the J 23738-A vacuum pump, attempt to apply a vacuum up to the specified value.
Can the specified value of vacuum be obtained and held?
5 in Hg
Go to Step 12
Go to Step 10

10
Leave the system connected as in Step 9.
Disconnect the vent line at the EVAP Vent Valve.
Plug the vent line.
Attempt to apply a vacuum up to the specified value using the J 23738-A vacuum pump.
Can the specified value of vacuum be obtained and held?
5 in Hg
Go to Step 16
Go to Step 11

11
Inspect the EVAP Vent line from the canister to the EVAP Vent Valve for leaks or missing/damaged O-ring seals.
If you find a condition repair the EVAP system as necessary.
Did you find and correct the condition?
--
Go to Step 21
Go to Step 17

12
Important: The following steps require the J 41413 EVAP pressure/purge diagnostic station and the J 41416 ultrasonic leak detector .
Always zero the EVAP pressure and vacuum (in. H2O) gauges on the J 41413 EVAP pressure/purge diagnostic station before proceeding with diagnosis.


Turn OFF the ignition.
Remove the plug and the hand vacuum pump.
Reconnect all the EVAP components.
Connect the J 41413 EVAP pressure/purge diagnostic station to the EVAP system service port.
Command the EVAP Vent Valve ON (closed) using a scan tool.
Continuously attempt to pressurize the EVAP system by leaving the EVAP pressure/purge diagnostic station control **** in the pressurize position.
Using the J 41416 ultrasonic leak detector locate and repair EVAP system leak.
Did you find and repair the condition?
--
Go to Step 21
Go to Step 13

13
Inspect the EVAP system for restrictions. Refer toTest Descriptions.
Repair as needed.
Did you find and correct the condition?
--
Go to Step 21
Go to Step 19

14
Repair the vacuum source to the EVAP Purge Solenoid Valve.

Is the action complete?
--
Go to Step 21
--

15
Important: Inspect the EVAP Purge Solenoid Valve and the purge line for carbon contamination. Refer to Diagnostic Aids .


Replace the EVAP Purge Solenoid Valve. Refer to Evaporative Emission (EVAP) Canister Purge Solenoid Valve Replacement .

Is the action complete?
--
Go to Step 21
--

16
Replace the EVAP Vent Valve. Refer to Evaporative Emission (EVAP) Vent Valve Replacement .

Is the action complete?
--
Go to Step 21
--

17
Replace the EVAP Vapor Canister. Refer to Evaporative Emission (EVAP) Canister Replacement .

Is the action complete?
--
Go to Step 21
--

18
Replace the EVAP line from the EVAP Purge solenoid valve to the EVAP canister. Refer to Fuel Hose/Pipes Assembly Replacement .

Is the action complete?
--
Go to Step 21
--

19
With the EVAP system pressurized, compare the EVAP pressure/purge diagnostic station pressure gauge (in. H20) reading to the Fuel Tank Pressure sensorreading on the scan tool.
Compare the readings with the system depressurized. Refer to the Test Description.
Does the Fuel Tank Pressure sensor indicate the actual amount of pressure in the EVAP system?
--
Go to Step 3
Go to Step 20

20
Replace the Fuel Tank Pressure sensor. Refer to Fuel Tank Pressure Sensor Replacement .

Is the action complete?
--
Go to Step 21
--

21
Select the Diagnostic Trouble Code (DTC) option and the Clear DTC Information option using the scan tool.
Idle the engine at the normal operating temperature.
Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.
Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text, if applicable.
Does the scan tool indicate that this test ran and passed?
--
Go to Step 22
Go to Step 2

WS6FirebirdTA00

iTrader: (33)

wow, you are the man lol