2000 Toyota Avalon does anyone know an honest mechanic or garage in Garland or Richardson, TX?
does anyone know an honest mechanic or garage in Garland or Richardson, TX?
What is your question?
check engine light still coming on after reset codes. Says purge flow is the problem. What should it cost to diagnose and repair this problem? I turn check engine light off with OBDII tool about every 140 miles.
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trouble codes are: Po441--Incorrect Purge flow
Po446--Vent control circuit
On the on board test codes, there #'s 1,2,4,6,7,8. All are OK except#2 which says: ID 01, MOD-$10, Min=57, STS=fail.
Do you know what these mean? Thanks
I want to thank you, Parts guy, for taking the time to give me solutions below, Do you think these tests you sent to me are very time consuming/
Merry Xmas
Customer Concern: Check engine light is on, trouble codes P0440, P0441 and P0446. The codes are for the Evaporative Emission Control System (EVAP). All three codes will set for a large leak in the system.
Tests/Procedures: 1. Verify that the gas cap is an OE style gas cap. The gas cap must be able to hold the correct amount of vacuum to pass the evap test.
2. Locate the Canister Closed Valve (CCV), on or by the air filter housing, and verify that the hose is connected and not pulled off.
3. Test the CCV, the Purge Solenoid (PS) and the Vacuum Switching Valve (VSV) on the charcoal canister, by manually grounding them, and verify that they operate and function properly. Some scan tools will activate the solenoids also, so it is a good thing to activate them through a scan tool, so one knows that the wire harness and the Engine Control Module (ECM) are OK. The CCV is normally open and it should close and hold vacuum when grounded. The VSV on the canister is normally closed, and when grounded, should open. The PS should open when grounded and apply vacuum to the charcoal canister for purge control and evaporative system testing.
4. Next, simulate an evaporative test and verify that the system holds vacuum and functions normally. To do that test, get to the ECM and backprobe the signal wire for the pressure sensor. It should read around 3.3 volts, no vacuum or pressure. Next, ground the CCV and the VSV on the canister. Start the vehicle, and if there is manifold vacuum to the PS, manually tap it to ground and draw vacuum in the evaporative system and the fuel tank, then verify that the pressure sensor voltage drops to around 2 volts. Then stop grounding the PS and see if the system leaks. If a smoke machine is used, the canister will leak, so clamp off the hose that commonly has the yellow stripe, to test the system.
5. Always ground the CCV and the VSV solenoid, on the canister, 20 to 30 times and verify that they still operate when hot.
Tech Tips: Toyota systems check with vacuum, not pressure. Always verify that the lines on the purge solenoid are installed correctly.
Vehicle Application: 2000 Avalon 3.0 2001 Camry 3.0
Customer Concern: Check engine light is on with trouble codes P0441 and P0446. The codes are evaporative system codes.
Tests/Procedures: 1. Verify that the gas cap is a factory Toyota gas cap and visually inspect that all hoses and lines are tight and connected.
2. Locate the canister closed solenoid and the vacuum switching valve on the canister, manually ground them and verify that they operate and function. The canister closed solenoid is normally open and should close when grounded. The vacuum switching valve on the canister is normally closed and needs to open when grounded.
3. Verify that the hoses are not loose or pulled off the canister closed valve on the air cleaner housing. This has been a common problem on some models.
4. If no problem is found, the next step is to ground the canister closed solenoid and the vacuum switching valve under the vehicle, simulate an evaporative test and verify that the system holds vacuum and functions normally. When the solenoids are grounded, back probe the Blue/Black (L/B) wire on the pressure sensor, and with no vacuum or pressure, the voltage should read around 3.3 volts. Start up the vehicle and turn on the purge vacuum switching valve and use engine vacuum to draw down the system to around 2 volts on the pressure sensor. If the voltage does not increase rapidly, there is no problem. If the voltage increases quickly, look for the leak in the evaporative system.
Tech Tips: Toyota systems check with vacuum, not pressure. When using a smoke machine, the system may leak out the canister hose with the Yellow (YEL) stripe. Try to use a scan tool to operate the solenoids, to check the Engine Control Module (ECM) and the wire harness.
These are the test that need to be performed by a qualified Tech. Unfortunately I live in Florida and can't recommend a repair shop. I would make sure that the shop has ASE certified techs and some kind of national accreditation. Wish you the best.
trouble codes are: Po441--Incorrect Purge flow Po446--Vent control circuit On the on board test codes, there #'s 1,2,4,6,7,8. All are OK except#2 which says: ID 01, MOD-$10, Min=57, STS=fail. Do you know what these mean? Thanks I want to thank you, Parts guy, for taking the time to give me solutions below, Do you think these tests you sent to me are very time consuming/ Merry Xmas
Customer Concern: Check engine light is on, trouble codes P0440, P0441 and P0446. The codes are for the Evaporative Emission Control System (EVAP). All three codes will set for a large leak in the system. Tests/Procedures: 1. Verify that the gas cap is an OE style gas cap. The gas cap must be able to hold the correct amount of vacuum to pass the evap test. 2. Locate the Canister Closed Valve (CCV), on or by the air filter housing, and verify that the hose is connected and not pulled off. 3. Test the CCV, the Purge Solenoid (PS) and the Vacuum Switching Valve (VSV) on the charcoal canister, by manually grounding them, and verify that they operate and function properly. Some scan tools will activate the solenoids also, so it is a good thing to activate them through a scan tool, so one knows that the wire harness and the Engine Control Module (ECM) are OK. The CCV is normally open and it should close and hold vacuum when grounded. The VSV on the canister is normally closed, and when grounded, should open. The PS should open when grounded and apply vacuum to the charcoal canister for purge control and evaporative system testing. 4. Next, simulate an evaporative test and verify that the system holds vacuum and functions normally. To do that test, get to the ECM and backprobe the signal wire for the pressure sensor. It should read around 3.3 volts, no vacuum or pressure. Next, ground the CCV and the VSV on the canister. Start the vehicle, and if there is manifold vacuum to the PS, manually tap it to ground and draw vacuum in the evaporative system and the fuel tank, then verify that the pressure sensor voltage drops to around 2 volts. Then stop grounding the PS and see if the system leaks. If a smoke machine is used, the canister will leak, so clamp off the hose that commonly has the yellow stripe, to test the system. 5. Always ground the CCV and the VSV solenoid, on the canister, 20 to 30 times and verify that they still operate when hot. Tech Tips: Toyota systems check with vacuum, not pressure. Always verify that the lines on the purge solenoid are installed correctly. Vehicle Application: 2000 Avalon 3.0 2001 Camry 3.0 Customer Concern: Check engine light is on with trouble codes P0441 and P0446. The codes are evaporative system codes. Tests/Procedures: 1. Verify that the gas cap is a factory Toyota gas cap and visually inspect that all hoses and lines are tight and connected. 2. Locate the canister closed solenoid and the vacuum switching valve on the canister, manually ground them and verify that they operate and function. The canister closed solenoid is normally open and should close when grounded. The vacuum switching valve on the canister is normally closed and needs to open when grounded. 3. Verify that the hoses are not loose or pulled off the canister closed valve on the air cleaner housing. This has been a common problem on some models. 4. If no problem is found, the next step is to ground the canister closed solenoid and the vacuum switching valve under the vehicle, simulate an evaporative test and verify that the system holds vacuum and functions normally. When the solenoids are grounded, back probe the Blue/Black (L/B) wire on the pressure sensor, and with no vacuum or pressure, the voltage should read around 3.3 volts. Start up the vehicle and turn on the purge vacuum switching valve and use engine vacuum to draw down the system to around 2 volts on the pressure sensor. If the voltage does not increase rapidly, there is no problem. If the voltage increases quickly, look for the leak in the evaporative system. Tech Tips: Toyota systems check with vacuum, not pressure. When using a smoke machine, the system may leak out the canister hose with the Yellow (YEL) stripe. Try to use a scan tool to operate the solenoids, to check the Engine Control Module (ECM) and the wire harness. These are the test that need to be performed by a qualified Tech. Unfortunately I live in Florida and can't recommend a repair shop. I would make sure that the shop has ASE certified techs and some kind of national accreditation. Wish you the best.