evap code on explorer
i got an evap leak code (i forget which one) on an explorer. i looked up the TSBs and found a recall on an evap part that fit this car (97 4wd 4.0 sohc... and it was built in the facotry that had this recall). i was wondering if anyone had access to a TSB database and could look up which part it was ( i dont have access to alldata this week). i am going to be working on this car this weekend and figuring i might as well test the evap system to see if this part was the problem.
can someone give me a hand finding out what part this is? if its not a problem...
There are two TSB`s but niether one tells you to replace a specific part. They both describe factory approved methods of diagnostics. Depneding on what code you have the most likely parts to fail are the cannister vent solenoid for a small leak or the vapor management valve under the hood. That is... provided the cap was not left loose which will set a code for a gross leak. here is one of the TSB`s which supercedes the first.
http://www.fordtechservice.dealercon...1527/adobe.gifPrintable View (13 KB) TSB
- MALFUNCTION INDICATOR LAMP (MIL) - DIAGNOSTIC TROUBLE CODES (DTCS) P0442 AND P0455 - NO DRIVEABILITY CONCERNS
Publication Date: OCTOBER 29, 1999
1997-2000 CROWN VICTORIA, TAURUS
1998-2000 CONTOUR, MUSTANG
1997 F-250 LD
1997-2000 E-150, EXPEDITION, F-150
1998-2000 RANGER, WINDSTAR
1997-2000 TOWN CAR
1998 MARK VIII
1997-2000 GRAND MARQUIS, SABLE
This TSB article is being republished in its entirety to include vehicles built through the 2000 model year and to revise the following NOTE.
NOTE:FOR 1998 MODEL YEAR MUSTANG, THIS TSB IS ONLY APPLICABLE TO CALIFORNIA VEHICLES.
There may be difficulty diagnosing a vehicle with Malfunction Indicator Lamp (MIL) illuminated and Diagnostic Trouble Codes (DTCs) P0442 and P0455 stored in continuous memory with no driveability concerns present.
Diagnose DTCs P0442 and P0455 by referring to the following Evaporative Emission (EVAP) Running Loss System Monitor Procedure, Service Bay Diagnostic System (SBDS) Static Leak Test, and EVAP Running Loss System Drive Cycle for details.
EVAP RUNNING LOSS SYSTEM MONITOR PROCEDURE
This is an on-board strategy designed to detect a leak from a hole (opening) equal to or greater than 1.016mm (0.040") in the EVAP system. The proper function of the individual components of the EVAP system as well as its ability to flow fuel vapor to the engine is also examined.
The EVAP Running Loss System Monitor relies on the individual components of the EVAP system to apply vacuum to the fuel tank and then seal the system. The fuel tank pressure is then monitored to determine the total vacuum lost (bleed-up) for a calibrated period of time. Inputs from the Engine Coolant Temperature (ECT) sensor or Cylinder Head Temperature (CHT) sensor, Intake Air Temperature (IAT) sensor, Mass Air Flow (MAF) sensor, Vehicle Speed Sensor (VSS) or Output Shaft Sensor (OSS), Fuel Level Input (FLI) sensor, and Fuel Tank Pressure (FTP) sensor are required to enable the EVAP Running Loss System Monitor. The Powertrain Control Module (PCM) monitors the time since power down and will not allow the EVAP Running Loss System Monitor to run until the minimum soak timer (6-10 hours) has expired.
NOTE:DURING THE EVAP RUNNING LOSS SYSTEM MONITOR DRIVE CYCLE, A PCM RESET (CLEARING CONTINUOUS CODES) WITH KEY ON, ENGINE OFF (KOEO) WILL BYPASS THE MINIMUM SOAK TIME REQUIRED TO COMPLETE THE MONITOR. THE EVAP RUNNING LOSS SYSTEM MONITOR WILL NOT RUN IF THE KEY IS TURNED OFF AFTER A PCM RESET UNLESS THE MINIMUM SOAK TIME WAS REACHED. THE EVAP RUNNING LOSS SYSTEM MONITOR WILL NOT RUN IF A MAF, ECT, IAT, VSS, FLI, OR FTP SENSOR FAILURE(S) IS INDICATED. THE EVAP RUNNING LOSS SYSTEM MONITOR WILL NOT INITIATE UNTIL THE HEATED OXYGEN SENSOR (HO2S) MONITOR HAS COMPLETED.
The EVAP Running Loss System Monitor is executed by the individual components of the EVAP Running Loss System as follows:
SBDS STATIC LEAK TEST
- The EVAP canister purge valve applies a vacuum to the fuel tank. A minimum duty cycle on the EVAP canister purge valve (75%) must be met before the EVAP Running Loss System Monitor can begin.
- The Canister Vent (CV) solenoid will close (100% duty cycle) to seal the EVAP system.
- The FTP sensor will be used by the EVAP Running Loss System Monitor to determine if the target vacuum on the fuel tank is being reached to perform the leak check.
- If the initial target vacuum cannot be reached, DTC P0455 (large leak detected) will be set. The EVAP Running Loss System Monitor will abort and not continue with the leak check portion of the test.
Once the target vacuum is obtained on the fuel tank, the EVAP canister purge valve closes and the change in the fuel tank vacuum will be monitored over a calibrated period of time. If the change in fuel tank vacuum is less than the calibrated threshold, the EVAP Running Loss System Monitor passes.
If the change in fuel tank vacuum exceeds the calibrated threshold, the test will rerun up to three (3) times. If the calibrated threshold is still being exceeded after three tests, a vapor generation check must be performed before DTC P0442 (small leak detected) will be set. The system accomplishes this by returning the EVAP system to atmospheric pressure by closing the EVAP canister purge valve and opening the CV solenoid. Once the FTP sensor observes the fuel tank is at atmospheric pressure (approximately 2.6 volts), the CV solenoid closes (seals the EVAP system). If the fuel tank pressure buildup exceeds the calibrated threshold, the leak test results are invalidated due to excessive vapor (the EVAP Running Loss System Monitor will pass and complete). If the fuel tank pressure buildup does not exceed the calibrated threshold, the leak test results are valid and DTC P0442 will be set.
- The MIL is activated for DTCs P0442 and P0455 after two (2) occurrences of the same fault.
NOTE:REFER TO THE LATEST POWERTRAIN CONTROL/EMISSIONS DIAGNOSIS (PC/ED) SERVICE MANUAL ON SBDS OR SERVICE BAY TECHNICAL SYSTEM (SBTS) FOR INFORMATION ON DTCs P0443, P0446, P0452, P0453, P1450, AND P1451.
EVAP RUNNING LOSS SYSTEM DRIVE CYCLE
- Perform SBDS startup.
- Select "Powertrain" from the Main Menu.
- Enter the Vehicle Identification Number (VIN) and then press "Continue."
- Select "Electronic Engine Control" under Categories and "DCL Display" under Tools, then press "Continue."
- If applicable, select the appropriate vehicle qualifier and then press "Continue."
- Follow the instructions on the connection screen, make sure vehicle is in Park or Neutral, chock the tires, start vehicle, and press "Continue."
- Select "Table."
- Select EVM (units of mode and %), ECV (units of mode), FTP (units of volts), IAC (units of %), RPM, and then press "Continue."
NOTE:IF ALL OF THE PARAMETERS FOR STEP 8 ARE NOT AVAILABLE USING THE LATEST SBDS CD-ROM RELEASE, RETURN TO THE MAIN MENU AND USE THE FOLLOWING VIN FOR EVAP TESTING ONLY: XXXXM91V6VXXXXXXX.
- Use the pendant on the Portable Vehicle Analyzer (PVA) to select the ECV (on/off) using the "#" button and then press "Yes." The ECV should now have an "=" sign next to it. Pressing the "Yes" button turns the ECV on and off. Turn the ECV on (shuts off venting of system).
- Repeat the procedure in Step 9 to turn the EVM on (opens system to engine vacuum). The FTP voltage should drop to 0.8 volts or less (voltage should be attained in approximately 1 minute). If the FTP voltage does not reach 0.8 volts or less, then a large leak has been detected (follow the latest PC/ED Service Manual diagnostics contained on SBDS or SBTS).
NOTE:IF THE VEHICLE STALLS, IT WILL ALSO BE NECESSARY TO RAISE THE ENGINE SPEED TO 1500 RPM. THIS CAN BE ACCOMPLISHED BY USING THE PENDANT ON THE PVA TO INCREASE THE IAC (%) TO RAISE THE RPM.
- Use the pendant on the PVA to turn the EVM off (holds system pressure constant), FTP voltage should stabilize within 20-30 seconds and then hold at a constant voltage. If the FTP voltage changes more than 0.4 volts in 1 minute, then a small leak has been detected (follow the latest PC/ED Service Manual diagnostics contained on SBDS or SBTS).
NOTE:COMMANDING THE ECV ON FOR MORE THAN 5 MINUTES MAY CAUSE DAMAGE TO THE CANISTER VENT SOLENOID.
http://www.fordtechservice.dealercon...35/tsbcaut.gifWARNING:STRICT OBSERVANCE OF POSTED SPEED LIMITS AND ATTENTION TO DRIVING CONDITIONS ARE MANDATORY WHEN PROCEEDING WITH THE FOLLOWING DRIVE CYCLE.
- Attach a scan tool and perform a PCM reset (clear continuous codes) to bypass the minimum soak timer. Leave the key in the On position and start the vehicle. Once started, the engine must not be turned off. If the engine is turned off, it will be necessary to perform a PCM reset and start over.
- Use the scan tool to access the ECT, FLI, IAT, FTP V, EVAPPDC, EVAPCV, VSS, and DTC CNT Parameter Identification Displays (PIDs). Warm the vehicle until the ECT reaches a minimum of 54°C (130°F).
- Remove the gas cap and verify that the FTP voltage reads between 2.4 and 2.8 volts. If voltage is not in this range, refer to the latest PC/ED Service Manual diagnostics contained on SBDS or SBTS for FTP diagnostics (Pinpoint Test Step HX22); otherwise, reinstall the gas cap and proceed to Step 4.
- Drive the vehicle on a smooth road at a constant speed between 64 and 105 km/h (40 and 65 mph) with the throttle as steady as possible. During this time, verify the following EVAP monitor entry conditions:
- FLI between 15 and 85% and stable ±5% (fuel may need to be added or removed)
- FTP V stable within ±0.1 volts
- IAT between 10 and 38°C (50 and 100°F)
- While continuing to drive at a constant speed (between 64 and 105 km/h (40 and 65 mph)), monitor the EVAPPDC, EVAPCV and FTP V PIDs. The EVAPPDC will increase to at least 75% and then return to 0%. EVAPPDC will again increase to at least 75% and then return to 0%. The third time the EVAPPDC increases to at least 75%, the EVAPCV will change from 0% to 100% (CV solenoid closed) to seal the system, the EVAPPDC will then return to 0%, and the leak test will begin to run. At this time, the FTP V should be stable at 1.2-1.6 volts (if the FTP V does not remain stable, then a small leak has been detected).
Continue to drive at steady throttle with light steering until the EVAPCV displays 0%. Monitoring the DTC CNT will help determine if a DTC is set. If this does not occur as described, refer to the following Note; otherwise proceed to Step 6.
- THE EVAP MONITOR LEAK TEST MAY RUN ON THE FIRST OR SECOND TIME THE EVAPPDC INCREASES TO MORE THAN 75% IF THE AMOUNT OF FUEL VAPOR IN THE FUEL TANK THAT HAS BEEN DETECTED BY THE EEC IS LOW.
- THE EVAP MONITOR WILL NOT RUN IF THE HO2S MONITOR HAS NOT COMPLETED (VIEW THE ON-BOARD SYSTEM READINESS TESTS TO DETERMINE IF THE MONITOR HAS COMPLETED).
- IF THE EVAP MONITOR ENTRY CONDITIONS DESCRIBED IN STEP 4 ARE NOT MAINTAINED, THEN THE EVAP MONITOR WILL NOT CONTINUE TO RUN.
- IF THE EVAPPDC STAYS AT 99% AND THE FTP V DOES NOT REACH 1.2-1.6 VOLTS, THEN THE EVAP MONITOR HAS DETECTED A LARGE LEAK (DTC P0455 WILL BE SET).
- IF THE FTP V DOES NOT REMAIN STABLE AT 1.2-1.6 VOLTS (INCREASES MORE THAN 0.4 VOLTS) WHILE THE EVAP MONITOR IS RUNNING, THEN THE PCM WILL RETRY THE LEAK TEST A MAXIMUM OF THREE (3) TIMES. IF THE EVAP MONITOR LEAK TEST FAILS ALL THREE TIMES, THEN A VAPOR GENERATION CHECK WILL BE PERFORMED. IF VAPOR GENERATION HAS NOT BEEN DETECTED, THEN THE EEC HAS DETERMINED THERE IS A SMALL LEAK (DTC P0442 WILL BE SET).
- IF ANY DTCs ARE SET, FOLLOW THE LATEST PC/ED SERVICE MANUAL DIAGNOSTICS CONTAINED ON SBDS OR SBTS.
- Bring the vehicle to a stop.
- With the scan tool, view the On-Board System Readiness Tests to determine if the EVAP Monitor has been completed. If the EVAP Monitor has completed and there are no continuous DTCs, then the PCM has not detected any concerns. Repeat this Drive Cycle if the EVAP Monitor has not completed and there are no continuous DTCs in memory.
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Here is another TSB I missed in the earlier search.
http://www.fordtechservice.dealercon...1527/adobe.gifPrintable View (116 KB) TSB
- DRIVEABILITY - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED WITH DTC'S P0442, P0455, P0456, P0457, P1442 OR CHECK FUEL CAP LAMP ILLUMINATED WITH DTC P0457
Publication Date: September 24, 2003
1997-2003 CROWN VICTORIA, MUSTANG, TAURUS
1998-2003 ESCORT ZX2
1997 F-250 HD
1997-1999 F-250 LD
1997-2003 E SERIES, EXPEDITION, EXPLORER, F-150, RANGER, WINDSTAR
1999-2003 F SUPER DUTY
2001-2003 ESCAPE, EXPLORER SPORT TRAC, EXPLORER SPORTLINCOLN:
1997-1998 MARK VIII
1997-2003 TOWN CAR
1997-2003 GRAND MARQUIS, SABLE
This article supersedes TSB 03-9-8 to update the vehicle lines and Service Procedures. ISSUE:
Some vehicles may exhibit a Malfunction Indicator Lamp (MIL) illuminated with Diagnostic Trouble Codes (DTCs) P0442, P0455, P0456, P0457 or P1442 or a "Check Fuel Cap" Lamp illuminated with DTC P0457 for the Evaporative Emission System. This may be caused by loose or leaking hoses, loose or broken fuel cap, a leak at the top of the fuel filler pipe neck, etc.
Use the Rotunda Leak Detector Smoke Machine (Part 218-00001) or equivalent, to locate and repair leaks in the Evaporative Emission System. Refer to the following Service Procedure for details.
Definitions of Acronyms
- CVS Canister Vent Solenoid
- DTC Diagnostic Trouble Code
- EVAP Evaporative Emissions System
- EVMV Electronic Vapor Management Valve
- FTP Fuel Tank Pressure
- MIL Malfunction Indicator Lamp
- NGS New Generation STAR Tester
- PID Parameter Identifier
- WDS Worldwide Diagnostic System
NOTE:THIS PROCEDURE SUPERSEDES ALL OTHER PROCEDURES PUBLISHED IN SERVICE MANUALS AND TSB ARTICLES.
NOTE:MANY EVAP LEAKS ARE CAUSED BY A LOOSE OR FAULTY CAP. IF THE FUEL CAP IS SUSPECT DURING VISUAL INSPECTION, DO NOT DISTURB THE FUEL CAP UNTIL THE DIAGNOSTIC PROCEDURE IS COMPLETE. IF THE LEAK VERIFICATION FAILS, THE CAP CAN BE REPOSITIONED OR REPLACED AND THE TEST REPEATED. THIS ACTION WILL ISOLATE THE CAP FROM THE REST OF THE EVAP SYSTEM AS A POTENTIAL CONCERN. IF DEBRIS ON THE SEALING SURFACE OF THE CAP APPEARS TO BE THE SOURCE OF THE LEAK, CLEAN THE CAP AND REINSTALL.
OVERVIEW OF TEST PROCEDURES
NOTE:SEE (FIGURE 1) AT END OF ARTICLE FOR TEST PROCEDURE FLOWCHART.
This TSB provides the following procedures:
EVAP CANISTER PURGE VALVE NO FLOW TEST
- Check the EVAP Canister Purge Valve (9C915) for a no flow condition
- Locate a leak so that a repair can be performed
- Verify repair by utilizing a metered air pressure test
SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE)
- Using WDS Datalogger select the following PID's: EVAPVM# (or EVMV#), EVAPCV# and FTP.
- Start the vehicle.
- Close both the Canister Vent Solenoid (CVS) (EVAPCV# On or 100% duty cycle) and the EVAP Canister Purge Valve (EVAPVM# Off or zero % duty cycle).
- While monitoring the FTP PID, command open the EVAP Canister Purge Valve with the EVAPVM# PID to 100% duty.
- If the FTP decreases and/or the RPM changes and/or the engine stalls, the test passed. Turn off engine and proceed to test procedures below. Otherwise replace the EVAP Canister Purge Valve, verify the repair by repeating the No Flow Test and return vehicle.
LEAK VERIFICATION (METERED AIR SYSTEM)
- Disconnect the larger of two manifold vacuum lines at the EVAP Canister Purge Valve and cap it at the EVAP Canister Purge Valve (see Figure 2).
- Connect the Smoke Machine power cables to vehicle battery. The "Power Indicator Lamp" should be on indicating a good battery contact.
- Position the selector valve on Rotunda's Smoke Machine Control Panel to "SMOKE".
- Locate the vehicle's Evaporative Emission Service Test Port and remove the green cap. The EVAP Service Test Port is located close to or on the EVAP Canister Purge Valve.
http://www.fordtechservice.dealercon...35/tsbcaut.gifWARNING:DO NOT REMOVE THE SCHRADER VALVE. REMOVING THE SCHRADER VALVE FROM THE TEST PORT ON VEHICLES EQUIPPED WITH THE ELECTRONIC VAPOR MANAGEMENT VALVE (9G641) AND/OR ELECTRONIC VAPOR MANAGEMENT VALVE & BRACKET ASSEMBLY (9G683) (SEE FIGURE 3), OR EVAP CANISTER PURGE VALVE (9C915) AND/OR EVAP CANISTER PURGE VALVE & BRACKET ASSEMBLY (9F933) (SEE FIGURE 2) WILL PERMANENTLY DAMAGE THE VALVE.
- Install the EVAP Emission Test Port Adapter that is provided with the Rotunda's Smoke Machine to EVAP Canister Purge Valve test port.
NOTE:SPECIAL PROCEDURES HAVE BEEN DESIGNATED FOR WINDSTAR, LS, THUNDERBIRD & PZEV FOCUS BECAUSE THEY HAVE A CHECK VALVE THAT WILL PREVENT SMOKE FROM ENTERING THE FILLER NECK.
- Connect black smoke hose nozzle tip to the EVAP Emission Test Port Adapter. For all except Windstar, LS, Thunderbird & PZEV Focus - Use NGS or WDS to close CVS. (CVS WILL REOPEN AFTER NINE (9) MINUTES OF CONTINUOUS OPERATION).
- For all except Windstar, LS, Thunderbird & PZEV Focus - Remove the fuel cap from the vehicle. Depress remote starter button: Smoke will be introduced into the EVAP Emission System. Secure the fuel cap once smoke is seen exiting from the fuel tank's neck area. For Windstar, LS, Thunderbird & PZEV Focus, do not remove fuel cap. Depress starter button and introduce smoke to system until it can be seen exiting the CVS (located by filler neck). Once smoke is seen, use NGS or WDS to close CVS. (CVS WILL REOPEN AFTER NINE (9) MINUTES OF CONTINUOUS OPERATION).
- Press and release the remote starter button in intervals of approximately 15 seconds on and 15 seconds off. Use the halogen light provided with the Smoke Machine to look for smoke in the engine compartment, EVAP hoses to EVAP Canister Purge Valve, CVS, carbon canister and area around the fuel cap. Wiggle fuel vapor lines to check for leaks. Check for leaks in areas that are difficult to access, such as connections on top of the tank where connections may be or inside frame rails. Use the black light to ensure that there are no leaks. If a leak is detected, repair as necessary. If the leak is not detected from the top, check under the bottom of vehicle. Inspect the EVAP hoses running to the carbon canister, fuel filler neck, CVS, and EVAP Canister Purge Valve. Go to LEAK VERIFICATION to verify any repair or if no leak is found.
- Position the selector valve located on the Smoke Machine control panel to "METER".
- Verify calibration of the flow meter by using the .020" calibrated leak orifice. To do this, insert air supply hose (transparent hose) nozzle tip into appropriate EVAP System calibrated leak orifice located on the front of the Smoke Machine panel.
- TURN ON: Depress the remote starter button. Observe the position of the flow meter indicator ball. Position the flow meter red pointer flag so it aligns with the measurement of the indicator ball. Release the button and remove the air supply hose nozzle tip from the EVAP System calibrated leak orifice.
NOTE:THIS FLOW METER CALIBRATION MEASUREMENT INDICATES THE VEHICLE PASS OR FAIL CRITERIA BASED ON THE .020" EVAP SYSTEM LEAK STANDARD.
- Connect the transparent air supply hose nozzle tip into the EVAP Service Test Port adapter.
- Use NGS or WDS Diagnostic tool to CLOSE the CVS.
- Depress the remote starter button on the Rotunda's Smoke Leak Detector. The indicator ball in the flowmeter will go all the way to the top indicating the system is being pressurized. Continue to depress the remote starter button until the ball stops descending. Once the indicator ball has stopped descending, observe if it is above or below the red indicator flag. If performing this verification following a repair, go to Step 7. If performing this verification after performing the SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE), go to Step 8.
- Leak Verification After Repair
- If the measurement is below the indicator flag the system has passed. The test procedure is complete. Remove the Smoke Machine Test equipment from the vehicle and reconnect the large EVAP Canister Purge Valve manifold vacuum hose and the test port's green cap.
- If the measurement is above the indicator flag, repeat SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE).
- Leak Verification After Passing SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE)
- If the measurement is below the indicator flag the system has passed, go to Step 9.
- If the measurement is above the indicator flag, repeat SYSTEM LEAK CHECK (SMOKE TEST PROCEDURE).
- Using WDS Datalogger or NGS select the FTPV PID.
- Remove Fuel Cap and turn the vehicle's ignition switch to the run position and check the FTPV PID.
- The nominal value for the FTPV PID is 2.6V. If the value is greater than 2.8V or less than 2.4V, the FTP sensor is out of range and should be replaced. Verify the repair by checking to see if the new sensor is in range. For all except Windstar, LS, Thunderbird & PZEV Focus - if the sensor is within range, the concern is no longer present. (Windstar, LS, Thunderbird & PZEV Focus go to Step 12.)
- For Windstar, LS, Thunderbird & PZEV Focus only verify that filler neck clamps are in good working order and tightened. Repair as necessary. If no problem is found with clamps, replace the fuel cap.
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