The point I want to make is that the recall site shows my MPV should have had this part replaced as part of recall 2204H | Aug 31, 2004. I got the spendy original part and the CEL went away in about a mile and all is well now. After a fair bit of diagnosis, the bottom line is that I had a bad PCV elbow on the back side of the engine next to the firewall. I was getting P0171/P0174 codes, and the idle was super rough. Perhaps there are not too many on the road anymore! I have the odd fortune of having a 2003 MPV with only 85,000 miles (writing this in Dec 2019). I also learned something that others may find useful. I have really benefitted from the forum and the posts on P0171/P0174 in particular. Posted: Tue 4:30 pm Post subject: Re: Solution to Too Lean P0171 & P0174 (Mazda MPV 2002)
Thanks!Ģ003 Mazda MPV LX - sage green, 4 seasons pkg, rear step, rear a/c, side airbags, roof rack, fog lights, traction control I'm getting the exact same codes now and I've replaced other rotting rubber components so maybe this is it for me. Posted: Thu 7:35 am Post subject: Re: Solution to Too Lean P0171 & P0174 (Mazda MPV 2002) The ether gets drawn through the engine.diluted. Because of the path of the air, spraying starter fluid (ether) may not cause the change in idle that most vacuum leaks would see. Thanks for this posting.this may be my problem. Posted: Wed 11:26 am Post subject: Re: Solution to Too Lean P0171 & P0174 (Mazda MPV 2002) You will find that one of them is wrong." Whenever you think that you are facing a contradiction, check your premises. Hopefully I can help (I ain't a mechanic). This forum has been really helpful so I thought I should definitely give back. I hope this post helps somebody cause it took me a while to figure this stuff out. I took it to jiffy lube and it passed this time! Never had a problem since. They both fit snuggly and after resetting the engine codes, I drove the van around until the van computer until the powertrain drive (or whatever it's called) fully reset and said that I didn't have any codes anymore. I replaced both elbows and put them back as I found them.
I went to O'Reilly Autoparts and purchased two elbows I found there that appeared to be the same size as the elbows I was replacing.
The front one is easy to get to by the spark plugs, but the back one took some contorting on my arm and the temporary removal of some obstructions. When I removed one of the hoses, the elbow easily fell apart. Upon further inspection, this is where the problem was for me. I noticed a tee that branches off of the top of the main flow (not sure what it's called) and one hose goes to the back side of the engine and one to the front (see dotted lines in picture).Įach hose ends up being connected to the engine by an elbow. So then I started looking at where the main air goes after the air filter into the engine to trace the air. If I recall correctly, that did get rid of one of the codes (can't remember which). But that didn't fix the problem ultimately after I replaced the old hose with the new one.
#2003 mazda 6 p0171 cracked#
I did find a small vacuum hose that was cracked and leaking which comes from the back side (towards the cabin) of the engine (not the one from the top) so I went to Autozone where you can purchase vacuum hose by the foot (they'll cut it for you).
#2003 mazda 6 p0171 zip#
It seemed likely that it was the PCV valve elbow everyone talks about, but after further inspection and pulling things apart, that wasn't the case (although the hose down there was a bit loose thanks zip ties!).Īnyways, I started looking around at the air coming into the engine to check for leaks. I read online about a lot of things, like replace the oxygen sensors, and nothing seemed to work. About a month or so ago, I had been having a CEL issue and had been trying to get it solved so that my 2002 Mazda MPV could pass inspection.
Here's a solution to the P0171 and P0174 problems (too Lean (Bank 1 & Bank 2) that I have been meaning to post for some time. Posted: Thu 8:51 am Post subject: Solution to Too Lean P0171 & P0174 (Mazda MPV 2002) Solution to Too Lean P0171 & P0174 (Mazda MPV 2002)
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