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Damian
Dodge Dakota
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3/05/2007
20:58:52
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 Subject: 2000 4.7L MAF sensor?
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Hello. My Dakota has been getting terrible MPG (8-9 on highway). The Check Engine Light is on and the codes are P0171 System too Lean (Bank 1) and P0551 Power Steering Pressure Sensor Circuit Range/Performance. I have changed both the upstream and downstream O2 sensors. I have read cleaning the MAF sensor might correct this issue but I've read post suggesting this model/year Dakota does not have one. If it does I am unable to find it. I plan on buying a Chilton tomorrow but in the meantime can anyone clarify this truck does have one and where it is? I have check the factory air intake.
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josh
Dodge Dakota
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3/05/2007
22:30:04
| RE: 2000 4.7L MAF sensor?
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if i'm not mistaken the sensor is on the front of the intake manifold behind the a/c compressor. its a MAP sensor for the speed density system, if memory serves me correct that is where the problem is. i saw that once before at the dealership. it was weird as hell
hope this helps
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Scott C
Dodge Dakota
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3/05/2007
22:37:53
| RE: 2000 4.7L MAF sensor?
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it dont have one... ive checked 2 websites autozone and napa and neither show a part listing for the mass air flow sensor... if you got a system lean code its determined form the 02 sensors... common cause vacuum leak....
Scott C
Royal Auto
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Shoe
GenIII
3/06/2007
21:50:10
| RE: 2000 4.7L MAF sensor?
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I would check fuel pressure and clean the injectors. Little stuff.
'97 RC V6, 5spd, soon to be V8, 5spd!
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Markus
Dodge Dakota
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3/07/2007
01:50:52
| RE: 2000 4.7L MAF sensor?
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Josh is correct. The 4.7L engine does not have a Mass Air Flow sensor. It has a Manifold Absolute Pressure sensor. It's at the forward end of the intake manifold.
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JerryM
Dodge Dakota
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3/07/2007
05:12:00
| RE: 2000 4.7L MAF sensor?
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Damian,
Is your exhaust black and sooty?
I have a 2000 4.7 liter and had a similar issue a few years ago.
If so try this: unplug the power steering line pressure switch connector. It is on the drivers side compt. where the power steering pump disch line is. If I remember correctly it is a 2 wire tan color connector that unplugs. Check for steering fluid in this connector.
What happens is the PS switch blows, fluid runs down the wiring harness to the o2 sensor which fouls it and causes poor performance.
I replaced this switch which was about 20.00 and replaced the o2 sensor also and cleaned up the wiring harness best I could.
Problem solved. These switches blow and it is hard to diagnose. Took me about a week to figure out but have read some other posts the last few years about the same problem.
Give it a try and good luck.
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Troy S
Dodge Dakota
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3/10/2007
04:40:23
| RE: 2000 4.7L MAF sensor?
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Damian,
Jerry is right, I have a 2000 4.7L and mine threw the same P0171 & P0551 check engine codes as yours and the problem Jerry discribes is exactly what happened to me. Only I didn't get off as easy as him.
I replaced the upstream O2 sensor 2 times before I learned about this common problem. I tried my best to clean the wire harness myself, I aired it out and even disconnected the harness from the power steering PS and the upstream O2 sensor overnight to let it dry, put in a new 02 sensor and it popped that one too. I then took it to the dealer and told them what the problem was. They recommended changing the MAP or MAF sensor (cant remember the exact name) first, but that didn't fix anything. So they then replaced the whole main engine wiring harness.... ouch!
A 3 week nightmare and about $2100 dollars later my truck was as good as new. I got the old wire harness from the dealer and tore it apart when I got home, that thing was jam packed with power steering fluid, not only on the outside of the wires but also the inside the wires. So thats another way to diagnose the problem, if you pull the plug at the pre-cat O2 sensor and shine a flashlight in it, you'll see liquid, that is actually powersteering fluid. I also remember a little bit of fluid made it to the fuse box under the hood. I found this all hard to believe because I've never had to add PS fluid once.
I took pictures of the old harness if you want to see them, I'll have to find them.
Anyway I hope that you can just clean the harness and not have to go thru what I went thru.
Troy
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JerryM
Dodge Dakota
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3/12/2007
09:27:50
| RE: 2000 4.7L MAF sensor?
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Troy,
Sorry it cost you so much to fix, guess I got lucky. The whole problem starts from that cheap power steering line pressure switch. I guess the only thing you can do is if you get any engine/power steering codes, pull that connector and check that switch ASAP!
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jeffsrichert
Dodge Dakota
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1/13/2009
19:56:00
| RE: 2000 4.7L MAF sensor?
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my 2000 dakota with 4.7 magnum v8 keeps blowing o2 sensor fuse only at idle never in drive or reverse in motion
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Sandy
Dodge Dakota
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5/30/2009
16:56:21
|  RE: 2000 4.7L MAF sensor?
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Help!
i just went thru my emission test and failed on a power stering sensor, yes my check engine light has been on, yet i couldn't figure out why?
my PS fluid is a little low, can anyone give me any cheap solutions? you got me worried about that whole harness thing!
sandy
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JerryM
Dodge Dakota
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6/02/2009
20:03:03
| RE: 2000 4.7L MAF sensor?
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I would recomend checking that PS pressure switch, and replacing it if it is full of fluid. Then you can clean up the O2 sensors/wiring if any PS fluid got on them.
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SteveM
Dodge Dakota
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9/04/2010
18:09:12
| RE: 2000 4.7L MAF sensor?
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Just wanted to give Jerry a thanks for the heads up! Started with check engine light, coded it and got the system too lean message. I replaced my plugs and cleaned my K&N air filter and no help. Figured I would check online for info and found this post. What Jerry describes fit exactly what was going on with my slt Dakota. I bought a power steering pressure sensor and the pre cat oxygen sensor from rockauto parts online. Cost me about 75 bucks after shipping and only took 3 days at standard shipping to get the parts. Power steering sensor is a piece of cake although makes a bit of a mess. Oxygen sensor is easy until you try and reconnect the OE plug. I could not see past my hands to see what i was doing so essentially had to feel it out like braille. Finally got it and cleared the code out and drove like 20-30 miles today and code/check engine light has not popped yet. I hope this is all it took. Thanks Jerry, never would have figured it out without your post!
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SteveM
Dodge Dakota
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9/04/2010
18:25:26
| RE: 2000 4.7L MAF sensor?
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Just wanted to add.... this issue makes the efi think its running lean and I guess it starts throwing more fuel at the issue to compensate. I was getting the terrible gas mileage that another poster talked about as well. So besides a little mandatory driving i parked my truck and rode my bike until I could figure this out. Not everyone has this option, but the longer you wait the more power steering fluid will build up in wires and soot will build up in catalytic converter. Both will eventually cause much more expensive issues. So I guess I just wanted to warn anyone against driving much with this relatively minor issue occurring.
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moises
Dodge Dakota
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9/10/2010
20:13:29
| RE: 2000 4.7L MAF sensor?
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i have a 2000 dodge dakota with 4.7 ,i want to swap it with a 5.7 the hole engine and they are giving me the pcm computer,can it be done
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daddio
Dodge Dakota
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9/11/2010
10:18:54
| RE: 2000 4.7L MAF sensor?
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Sure it can be done. Labor intensive if you don't have a fat wallet or costly if you don't know how to fabricate.
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Dale
Dodge Dakota
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3/18/2012
18:52:59
| RE: 2000 4.7L MAF sensor?
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Ok?! So my dodge Dakota 4.7 liter popped the radiator hose!
And is now beginning to slowly overheat....the one thing I
noticed that I have in common with the other stories, is that my
power steering fluid seems to draining somewhere and my gas
mileage is crap! Any suggestions??
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billybigballa
Dodge Dakota
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10/16/2016
19:03:40
| RE: 2000 4.7L MAF sensor?
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My 4.7 is running terribly missing like crazy.
Throwing codea 0121 and 0300. Any suggestions
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