Absolute Pressure Sensor CODE 0803! Please Help!
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Absolute Pressure Sensor CODE 0803! Please Help!
I have an engine light on, when I extracted the code I got 0803. When I took a look at the explanation on FAQ forum it was a broken link. Can someone please tell me what exactly is an Absolute pressure sensor? Also, is it the same thing as MAP (Mainfold Pressure Sensor)? What is the best thing to do to get rid of, where is it located on the engine, and how much shoud I expect to pay for it?
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Originally Posted by Redmax
check the ecu codeson the top of this page
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Originally Posted by MrPink
an absolute pressure sensor or baro sensor senses atmospheric pressure to determine your altitude wich the pcm inputs into a formula to determine air density wich works with your maf sensor
If I get a new MAF sensor will that solve my problem? I have a chance to get the whole set up. What is the best way to fix this problem????
Member
Joined: Mar 2004
Posts: 61
well honestly i just bought my 96 max 4 days ago so i dont know maximas inside and out yet(YET being the key word,give me a month) but im pretty sure it doesnt have a seperate baro sensor(APS) but in most cars its just simulated by the pcm using the inputs from the MAF and IAT sensor so i would look at one of them. I will look into it further at my shop tomorrow and put up another post.
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Originally Posted by MrPink
well honestly i just bought my 96 max 4 days ago so i dont know maximas inside and out yet(YET being the key word,give me a month) but im pretty sure it doesnt have a seperate baro sensor(APS) but in most cars its just simulated by the pcm using the inputs from the MAF and IAT sensor so i would look at one of them. I will look into it further at my shop tomorrow and put up another post.
Member
Joined: Feb 2002
Posts: 80
A dealership in Atlanta just quoted me $173 for the MAP part. I'm gonna call them today or Monday to see if they think that will clear up the code. Hopefully I can get a straight answer without them making me bring the car in!
Got my fingers crossed!
Mike
Got my fingers crossed!
Mike
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Originally Posted by crashmanmike
A dealership in Atlanta just quoted me $173 for the MAP part. I'm gonna call them today or Monday to see if they think that will clear up the code. Hopefully I can get a straight answer without them making me bring the car in!
Got my fingers crossed!
Mike
Got my fingers crossed!
Mike
3. If possible please take some pictures and email them to me at bkrey380@stjohns.edu
Apreciate the Time and effort in advance
BTW: I also called a Nissan Stealership about it and they told me "theoratically there is no MAP sensor on the Nissan Maxima, but there is an Absolute pressure sensor which is located on the vaccuum which is the one that determines the pressure of the outside and inside, and sends it to the ecu.... don't know confused the s**t out of me
Member
Joined: Feb 2002
Posts: 80
Ouch!
yeah, I tried to pull out the part today just to see if I can before I ordered the new one. Wow. Thats a *****! There is one bolt on the bottom side of it (10mm) that is almost impossible to get to with a normal socket wrench. I'm gonna go to sears today to see if I can find anything else that might work to get it out.
If you don't have a Hayne's Manual, go get one. Thats what I'm using. I did the diagnostic testing that Hayne's recommended and the part turns out to be electrically faulty. So I'm pretty convinced that replacing it will be the solution. I electrically tested the connector leading up to the MAP sensor too, and it checked out okay, meaning all the chassis wiring is intact and not shorted out.
I found this website showing the part number for this unit. I only hope its accurate!
http://www.tomco-inc.com/Catalog/33map%20sensors.pdf
Yeah, *if* I decide to go through with this I'll try to take pics of it. Its gonna be a pain I think, but it looks do-able with the right tools. This will help me too, because removing this guy will let me have easier access to the knock sensor which has also gone bad on my car!
Gonna be a long month ahead!
Mike
yeah, I tried to pull out the part today just to see if I can before I ordered the new one. Wow. Thats a *****! There is one bolt on the bottom side of it (10mm) that is almost impossible to get to with a normal socket wrench. I'm gonna go to sears today to see if I can find anything else that might work to get it out.
If you don't have a Hayne's Manual, go get one. Thats what I'm using. I did the diagnostic testing that Hayne's recommended and the part turns out to be electrically faulty. So I'm pretty convinced that replacing it will be the solution. I electrically tested the connector leading up to the MAP sensor too, and it checked out okay, meaning all the chassis wiring is intact and not shorted out.
I found this website showing the part number for this unit. I only hope its accurate!
http://www.tomco-inc.com/Catalog/33map%20sensors.pdf
Yeah, *if* I decide to go through with this I'll try to take pics of it. Its gonna be a pain I think, but it looks do-able with the right tools. This will help me too, because removing this guy will let me have easier access to the knock sensor which has also gone bad on my car!
Gonna be a long month ahead!
Mike
Member
Joined: Feb 2002
Posts: 80
K I wanted to make sure I could pull the part out before I went and ordered a new one today. I finally got that 10mm nut off the bottom of the sensor using the tool in the pic below. Now that I did that, I'll go ahead and order the part and see if I can make a go of it.
Remember, these are pics of my '96 max. Your results may vary
Pic of sensor in car, all wiring harnesses attached:
Pic of sensor with harness removed:
3
Pic of tool used to get under sensor and remove 10mm bolt:
[PS- you may wonder about the ribbon tied to the other end of the wrench. Well, its a VERY tight squeeze down there, and the last thing I wanted was for my brand new $6.99 wrench falling into the abyss. So if it ever fell, the ribbon would give me an easy way to retrieve it. Worked about 4-5 times!]
I'll post more as I accomplish more
Mike
Remember, these are pics of my '96 max. Your results may vary
Pic of sensor in car, all wiring harnesses attached:
Pic of sensor with harness removed:
3Pic of tool used to get under sensor and remove 10mm bolt:
[PS- you may wonder about the ribbon tied to the other end of the wrench. Well, its a VERY tight squeeze down there, and the last thing I wanted was for my brand new $6.99 wrench falling into the abyss. So if it ever fell, the ribbon would give me an easy way to retrieve it. Worked about 4-5 times!]
I'll post more as I accomplish more
Mike
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
[QUOTE=crashmanmike]K I wanted to make sure I could pull the part out before I went and ordered a new one today. I finally got that 10mm nut off the bottom of the sensor using the tool in the pic below. Now that I did that, I'll go ahead and order the part and see if I can make a go of it.
Remember, these are pics of my '96 max. Your results may vary
Pic of sensor in car, all wiring harnesses attached:
Pic of sensor with harness removed:
3
Pic of tool used to get under sensor and remove 10mm bolt:
[PS- you may wonder about the ribbon tied to the other end of the wrench. Well, its a VERY tight squeeze down there, and the last thing I wanted was for my brand new $6.99 wrench falling into the abyss. So if it ever fell, the ribbon would give me an easy way to retrieve it. Worked about 4-5 times!]
Mike, check your PM, what can I say YOU ARE THE MAN
Please let me know how it works out, and what to look out for. GREAT JOB especially with the pictures
Also, if you can, please let me know the part # and how much it cost you. I greatly appreciate all the time and effort you are putting into this. Keep up the GREAT work
Remember, these are pics of my '96 max. Your results may vary
Pic of sensor in car, all wiring harnesses attached:
Pic of sensor with harness removed:
3Pic of tool used to get under sensor and remove 10mm bolt:
[PS- you may wonder about the ribbon tied to the other end of the wrench. Well, its a VERY tight squeeze down there, and the last thing I wanted was for my brand new $6.99 wrench falling into the abyss. So if it ever fell, the ribbon would give me an easy way to retrieve it. Worked about 4-5 times!]
Mike, check your PM, what can I say YOU ARE THE MAN
Please let me know how it works out, and what to look out for. GREAT JOB especially with the pictures
Also, if you can, please let me know the part # and how much it cost you. I greatly appreciate all the time and effort you are putting into this. Keep up the GREAT work
i have code 0803 (absolute pressure sensor) so i had 2aorder a new boost sensor cuz it was broken the was part #22365 2L900 am still waiting for it from the dealership but that should be the cuz of my ecu code.
Thread Starter
Joined: Sep 2003
Posts: 349
From: BROOKLYN NY
Originally Posted by max2max-98se
i have code 0803 (absolute pressure sensor) so i had 2aorder a new boost sensor cuz it was broken the was part #22365 2L900 am still waiting for it from the dealership but that should be the cuz of my ecu code.
Hrm, how were you able to daignose the problem? Also how much did the part wound up costing you?
Member
Joined: Feb 2002
Posts: 80
Originally Posted by max2max-98se
i have code 0803 (absolute pressure sensor) so i had 2aorder a new boost sensor cuz it was broken the was part #22365 2L900 am still waiting for it from the dealership but that should be the cuz of my ecu code.
max2max-98se, let us know if that clears it up for ya, cause thats our exact same problem. I'm looking at $173 for the part, plus $6.99 for my new wrench. Don't want to invest too much if that won't fix it!
Keep your fingers crossed.
Mike
took my car 2 different places finishline auto craft here in cali and the performance nissan dealership both checked my ecu for free and came 2 the same conclusion. 157.00 for the new boost sensor. the dealer wanted 80 bucks for install i said screw that lol. i will post with my results
Member
Joined: Feb 2002
Posts: 80
K guys.... pretty much everything I said, was all wrong. Sorry!
The thing I pointed to in the picture was NOT the MAP solenoid. In fact, I have no idea what it was. I bought a new solenoid from the shop today, installed it, and the problem STILL occurs. So no I am clueless.
Oh, and you wanna know what else. Yeah, I never had a 803 fault code. Yup, I had a 1302. The 0803 IS the sensor unit. On my car, the sensor unit itself is very easy to reach (its right on top, near the front of the car). The MAP solenoid is located under the air intake duct. Its kinda a pain to reach, but its do-able.
So, I have no clue guys. Sorry for mis-reading the post. I saw a MAP problem and assumed I had the same problem as you all. Turns out, my problem is the solenoid and yours is the sensor.
Good luck to all of us! I know I'm gonna need it.
MIke
The thing I pointed to in the picture was NOT the MAP solenoid. In fact, I have no idea what it was. I bought a new solenoid from the shop today, installed it, and the problem STILL occurs. So no I am clueless.
Oh, and you wanna know what else. Yeah, I never had a 803 fault code. Yup, I had a 1302. The 0803 IS the sensor unit. On my car, the sensor unit itself is very easy to reach (its right on top, near the front of the car). The MAP solenoid is located under the air intake duct. Its kinda a pain to reach, but its do-able.
So, I have no clue guys. Sorry for mis-reading the post. I saw a MAP problem and assumed I had the same problem as you all. Turns out, my problem is the solenoid and yours is the sensor.
Good luck to all of us! I know I'm gonna need it.
MIke
Member
Joined: Feb 2002
Posts: 80
This is kinda pointless, but I found my problem. I have no idea how long this existed, but apparently a vacuum hose *fell off* the throttle body. This is the vacuum source for the Manifold Absolute Pressure Solenoid... and under certain circumstances based on the solenoid position becomes a vacuum source for the MAP sensor (the code 0803 problem).
Point being, this was a free fix for me. Too bad I already paid for the new solenoid valve. All I had to do was pull out the air intake box and I could see all the vacuum hoses running up to the bottom and rear side of the throttle body. Sure as ****, one of them was not connected.
Hope everything works out for you guys. All I can say is check yer hoses.
Mike
Point being, this was a free fix for me. Too bad I already paid for the new solenoid valve. All I had to do was pull out the air intake box and I could see all the vacuum hoses running up to the bottom and rear side of the throttle body. Sure as ****, one of them was not connected.
Hope everything works out for you guys. All I can say is check yer hoses.
Mike
Thread
Thread Starter
Forum
Replies
Last Post