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almond
Samba Member
Joined: April 06, 2021
Posts: 38
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 Posted: Fri Aug 12, 2022 11:07 am Post subject: 2000 MV p1475 code + overheating |
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P1475 is lack of control of the EVAP Leak detection pump.
The van has 221k miles on it, and on a 95F day it overheated while driving around town. The needle went up to the max limit, then the temp warning light flashed some and a bell sounded. It then died for a sec, but restarted immediately. Running the heater on full brought temps back down.
Both fans work, and go through multiple speeds. I did replace one of the fans earlier in the summer because the driver side fan blade became detached from the fan motor and wore down the threads on the motor an reamed out the hole on the plastic fan.
I flushed the radiator and replaced the coolant with new G40.
During subsequent hot days it over heated a couple more times. It also stalled out momentarily one more time while overheated. So maybe 4 overheatings, 2 stalls, and most of the time, when not running the heater, temps above 190. Over two hot days. Running the heater keeps things cool.
An infrared temp gun on the radiator during one of those times showed 215, which makes me think the water pump/thermostata is working OK as hot coolant is getting to the radiator.
Twice while overheating I noticed the HVAC controls flashing.
Next week will be hot again so I expect to overheat and also be able to run more tests.
Would the P1475 cause any problems with cooling? My intuition is no.
Any ideas what I should check out next? I've read maybe the ignition coil.
Thanks |
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TheOneTrueQuux
Samba Member
Joined: May 26, 2021
Posts: 363
Location: Winona, MN
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| Posted: Fri Aug 12, 2022 12:01 pm Post subject: Re: 2000 MV p1475 code + overheating |
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| almond wrote: |
P1475 is lack of control of the EVAP Leak detection pump.
The van has 221k miles on it, and on a 95F day it overheated while driving around town. The needle went up to the max limit, then the temp warning light flashed some and a bell sounded. It then died for a sec, but restarted immediately. Running the heater on full brought temps back down.
Both fans work, and go through multiple speeds. I did replace one of the fans earlier in the summer because the driver side fan blade became detached from the fan motor and wore down the threads on the motor an reamed out the hole on the plastic fan.
I flushed the radiator and replaced the coolant with new G40.
During subsequent hot days it over heated a couple more times. It also stalled out momentarily one more time while overheated. So maybe 4 overheatings, 2 stalls, and most of the time, when not running the heater, temps above 190. Over two hot days. Running the heater keeps things cool.
An infrared temp gun on the radiator during one of those times showed 215, which makes me think the water pump/thermostata is working OK as hot coolant is getting to the radiator.
Twice while overheating I noticed the HVAC controls flashing.
Next week will be hot again so I expect to overheat and also be able to run more tests.
Would the P1475 cause any problems with cooling? My intuition is no.
Any ideas what I should check out next? I've read maybe the ignition coil.
Thanks |
Sounds like a plugged radiator to me. You can use that IR gun or a thermal imaging camera to confirm.
Really really be careful about letting it overheat. You may have already compromised the head gasket or scuffed a piston. It's super easy to do with only very short duration overheating, and the consequences are severe.
At the age and mileage you're at, you should replace the radiator preventatively anyway. The plastic end tanks and seals will give out sooner or later, and often it's a blow out type event, leading to engine failure. |
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almond
Samba Member
Joined: April 06, 2021
Posts: 38
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| Posted: Sun Aug 21, 2022 11:28 am Post subject: Re: 2000 MV p1475 code + overheating |
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Turns out both the fans were spinning in the wrong direction. So did not buy any parts for that fix. No idea how long that has been going on, and it was just too hot outside to handle it those few days
Also I the P1475 cleared itself after disconnecting the electrical connection at the EVAP LDP, cleaning the contacts, and plugging it back in. |
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