I'm getting the cel 450 code - evap sensor
#1
Pit Crew
Thread Starter
I'm getting the cel 450 code - evap sensor
I'll keep this story short and simple, any suggestions will be greatly APPRECIATED. Thanks to Yamae and Cowboy, I began looking at replacing my ECU because I have a '95 LS with the recalled 50220 ecu, so I replaced it with a later model 50303 and everything improved almost immediately, the high idle and other problems went away. Even the acceleration picked up nicely, but there's just one little glitch, every now and then I will get a sporadic cel code 450, usually only at start up. I've never gotten this code with the old ecu so I'm starting to think this may be a recurring problem with the newer ecu (which may be the reason it was sold on Ebay). On the other hand it could be more advanced in that it detects a problem with evap sensor when the older ecu didn't. First question is do these sensors fail on a "normal" basis? Secondly, I thought it could be something simple like the fuel tank cap, but after I replaced it the cel did not reappear and I thought the problem was solved, but 4 days later it reappeared, should I replace the sensor or could this be a resident problem with the newer ecu? Thanks in advance my friends.
#2
Moderator
I think you'd better to check the EVAP Pressure Sensor.
The link below may help you some although it's not about a 95 LS400.
The link below may help you some although it's not about a 95 LS400.
#3
Pit Crew
Thread Starter
I think you'd better to check the EVAP Pressure Sensor.
The link below may help you some although it's not about a 95 LS400.
How to Test and Replace EVAP Pressure Sensor P0450 - YouTube
The link below may help you some although it's not about a 95 LS400.
How to Test and Replace EVAP Pressure Sensor P0450 - YouTube
#4
Pit Crew
Thread Starter
I think you'd better to check the EVAP Pressure Sensor.
The link below may help you some although it's not about a 95 LS400.
How to Test and Replace EVAP Pressure Sensor P0450 - YouTube
The link below may help you some although it's not about a 95 LS400.
How to Test and Replace EVAP Pressure Sensor P0450 - YouTube
#5
Moderator
Attached is for a 98. Sorry that I only have a drawing for a 98. It's located at the LH FRONT FENDER.
#6
Pit Crew
Thread Starter
#7
Pit Crew
Thread Starter
Trending Topics
#8
Moderator
I haven't experienced that particular pinch and I'm not sure it is related to the code. But it should not be pinched. I worry that somebody might have dare pinched it. If so, there might be some problem hidden there.
#9
Driver School Candidate
I'll keep this story short and simple, any suggestions will be greatly APPRECIATED. Thanks to Yamae and Cowboy, I began looking at replacing my ECU because I have a '95 LS with the recalled 50220 ecu, so I replaced it with a later model 50303 and everything improved almost immediately, the high idle and other problems went away. Even the acceleration picked up nicely, but there's just one little glitch, every now and then I will get a sporadic cel code 450, usually only at start up. I've never gotten this code with the old ecu so I'm starting to think this may be a recurring problem with the newer ecu (which may be the reason it was sold on Ebay). On the other hand it could be more advanced in that it detects a problem with evap sensor when the older ecu didn't. First question is do these sensors fail on a "normal" basis? Secondly, I thought it could be something simple like the fuel tank cap, but after I replaced it the cel did not reappear and I thought the problem was solved, but 4 days later it reappeared, should I replace the sensor or could this be a resident problem with the newer ecu? Thanks in advance my friends.
You cannot use model 50303, it will throw error code because you don't have vapor pressure sensor on 1995 model
For 1995's:
Your original Ecm is either:
89661-50220 or 89661-50221 if Federal (49 state). Lexus new replacement on the TSB says to replace with 89661-50224
If California then your original Ecm is either 89661-50230 or 89661-50231. The TSB calls for 89661-50234
But searching a local Lexus parts site shows that number has been replaced with 89661-50235-85.
A 1996 Ecm will not work in a 95. It turns the check engine light on.
Last edited by OmariMack; 12-22-18 at 11:54 PM.
#10
Hey omari and ls400fan,
I actually have just gotten the same exact issue. I installed a rebuilt 50303 ecu replacing my 95 50220 ecu.
immediately got a P0450 code.
I'm reading contradicting information. Some say 95 and 96 ls400 are identical cars and have used 50303 ecu in 95 cars with no issue.
But you're saying the 95 hasn't got an evap sensor.
can anyone else confirm this or shed some light?
does the 95 in fact not have an evap sensor?
I actually have just gotten the same exact issue. I installed a rebuilt 50303 ecu replacing my 95 50220 ecu.
immediately got a P0450 code.
I'm reading contradicting information. Some say 95 and 96 ls400 are identical cars and have used 50303 ecu in 95 cars with no issue.
But you're saying the 95 hasn't got an evap sensor.
can anyone else confirm this or shed some light?
does the 95 in fact not have an evap sensor?
You cannot use model 50303, it will throw error code because you don't have vapor pressure sensor on 1995 model
For 1995's:
Your original Ecm is either:
89661-50220 or 89661-50221 if Federal (49 state). Lexus new replacement on the TSB says to replace with 89661-50224
If California then your original Ecm is either 89661-50230 or 89661-50231. The TSB calls for 89661-50234
But searching a local Lexus parts site shows that number has been replaced with 89661-50235-85.
A 1996 Ecm will not work in a 95. It turns the check engine light on.
For 1995's:
Your original Ecm is either:
89661-50220 or 89661-50221 if Federal (49 state). Lexus new replacement on the TSB says to replace with 89661-50224
If California then your original Ecm is either 89661-50230 or 89661-50231. The TSB calls for 89661-50234
But searching a local Lexus parts site shows that number has been replaced with 89661-50235-85.
A 1996 Ecm will not work in a 95. It turns the check engine light on.
#12
Driver School Candidate
Hi RelentLex
Some model of 1995 Ls does not have vapor pressure sensor but it depend on what vin number # on your car .. I've seen people who have a problem with 303 because 50303 request who have an vapor pressure sensor it will match on ecu because of Harness wiring have vapor pressure sensor
I have 1995 Lexus ls400 and doesn't have an vapor pressure sensor i had wrong use 50303, it will throw at you an error code of P0450 ... Actually you cannot jump over number 50303 it will throw an error code :P0450
Give me your VIN number, I will check online from Lexus website
Some model of 1995 Ls does not have vapor pressure sensor but it depend on what vin number # on your car .. I've seen people who have a problem with 303 because 50303 request who have an vapor pressure sensor it will match on ecu because of Harness wiring have vapor pressure sensor
I have 1995 Lexus ls400 and doesn't have an vapor pressure sensor i had wrong use 50303, it will throw at you an error code of P0450 ... Actually you cannot jump over number 50303 it will throw an error code :P0450
Give me your VIN number, I will check online from Lexus website
Hey omari and ls400fan,
I actually have just gotten the same exact issue. I installed a rebuilt 50303 ecu replacing my 95 50220 ecu.
immediately got a P0450 code.
I'm reading contradicting information. Some say 95 and 96 ls400 are identical cars and have used 50303 ecu in 95 cars with no issue.
But you're saying the 95 hasn't got an evap sensor.
can anyone else confirm this or shed some light?
does the 95 in fact not have an evap sensor?
I actually have just gotten the same exact issue. I installed a rebuilt 50303 ecu replacing my 95 50220 ecu.
immediately got a P0450 code.
I'm reading contradicting information. Some say 95 and 96 ls400 are identical cars and have used 50303 ecu in 95 cars with no issue.
But you're saying the 95 hasn't got an evap sensor.
can anyone else confirm this or shed some light?
does the 95 in fact not have an evap sensor?
#13
Driver School Candidate
Yes you can use 50224 or 50225, I just order other ecu 50224 today and i don't want to use 50225 because it could be throw an error code again, as in case..
Last edited by OmariMack; 12-28-18 at 02:48 AM.
#14
I see! Any idea which 95 models had evap sensor and which didnt?
My vin# is JT8UF22E0S0011067
thanks!
My vin# is JT8UF22E0S0011067
thanks!
Hi RelentLex
Some model of 1995 Ls does not have vapor pressure sensor but it depend on what vin number # on your car .. I've seen people who have a problem with 303 because 50303 request who have an vapor pressure sensor it will match on ecu because of Harness wiring have vapor pressure sensor
I have 1995 Lexus ls400 and doesn't have an vapor pressure sensor i had wrong use 50303, it will throw at you an error code of P0450 ... Actually you cannot jump over number 50303 it will throw an error code :P0450
Give me your VIN number, I will check online from Lexus website
Some model of 1995 Ls does not have vapor pressure sensor but it depend on what vin number # on your car .. I've seen people who have a problem with 303 because 50303 request who have an vapor pressure sensor it will match on ecu because of Harness wiring have vapor pressure sensor
I have 1995 Lexus ls400 and doesn't have an vapor pressure sensor i had wrong use 50303, it will throw at you an error code of P0450 ... Actually you cannot jump over number 50303 it will throw an error code :P0450
Give me your VIN number, I will check online from Lexus website
The following users liked this post:
OmariMack (09-13-19)
#15
Driver School Candidate
I just found research on Lexus website parts ,There are no vapor pressure sensor on 1990 to 1995 Lexus LS 400 only.
1996 to 2000 Lexus ls 400 does have an vapor pressure sensor
1996 ecm # is 89661-50303 = 1996 Ecm WILL NOT work in a 95 lexus ls400. It will turns the check engine light on and throw error code from: P0450
You need to return to ecm back who you brought it from
----------------------------------------------------------------
For 1995 Lexus ls400 :
Your original Ecm is either:
89661-50220 or 89661-50221 if Federal (49 state). Lexus new replacement on the TSB says to replace with 89661-50224
If California then your original Ecm is either 89661-50230 or 89661-50231. The TSB calls for 89661-50234
But searching a local Lexus parts site shows that number has been replaced with 89661-50235-85. (California)
QUOTE=RelentLex;10394594]I've also just found a 50225 ecu. Anyone know the difference between 50224 and 50225??[/QUOTE]
1996 to 2000 Lexus ls 400 does have an vapor pressure sensor
1996 ecm # is 89661-50303 = 1996 Ecm WILL NOT work in a 95 lexus ls400. It will turns the check engine light on and throw error code from: P0450
You need to return to ecm back who you brought it from
----------------------------------------------------------------
For 1995 Lexus ls400 :
Your original Ecm is either:
89661-50220 or 89661-50221 if Federal (49 state). Lexus new replacement on the TSB says to replace with 89661-50224
If California then your original Ecm is either 89661-50230 or 89661-50231. The TSB calls for 89661-50234
But searching a local Lexus parts site shows that number has been replaced with 89661-50235-85. (California)
QUOTE=RelentLex;10394594]I've also just found a 50225 ecu. Anyone know the difference between 50224 and 50225??[/QUOTE]
I see! Any idea which 95 models had evap sensor and which didnt?
My vin# is JT8UF22E0S0011067
thanks!
My vin# is JT8UF22E0S0011067
thanks!
Last edited by OmariMack; 12-28-18 at 01:37 PM.