What these codes mean and what I need to do to fix this?
Codes:
P0141 o2 sensor heater circuit bank 1 sensor 2
P0138 o2 sensor circuit high voltage bank 1 sensor 2
P0036 H02S heater control circuit bank 1 sensor 2
New to my GLI.. Noticed the clock and mileage still display while the car is off and key is out. Is that normal? seems that its in some weird accessory mode like some cars when you turn the key back from starting position. I can even turn the radio on.
View 4 RepliesOK, maybe I'm just spooking myself, but I've been getting poorer gas mileage than usual as of late, like 4 to 5 mpg less. I used to get 30+ when I took my car to work, but lately I've been getting 25 to 26 mpg. I calculated it out and it seemed less still, though I didn't do a very accurate calculation.
The other day, I felt like my ESP was kicking in early because my tires are getting a bit old and bald, so I turned it off for my drive home. I immediately noticed that I felt like more power was available (though that was probably my mind playing tricks) and my average MPG for the trip shot up to the 28.5 mpg range with some spirited driving.
Where the ESP or ASR has caused lower MPG? I replaced my MAF sensor recently because it had gone bad, or at least I was fairly certain it had, but now I'm not sure. I also have coil-packs due in the next few thousand miles or so as well, but this seems sporadic. I diagnosed the MAF (which the car was getting around 22MPG before the change) by disconnecting it. It shot up to the 30MPG range with it disconnected, but thinking back, my CEL as well as the ESP light came on. I'm wondering if my ECU turned off the ESP with the MAF disconnected and that is what increased my mileage, not the bad MAF...
Some questions I have regarding he bad gas mileage my car is getting. Up until winter, my car (2005 mk4 gli) was getting 300-330 miles to the tank. I thought was reasonable, about 150 to a half tank. The setup is pretty normal, apr stage 1 tune (87,89,93,100 octane) with bolt ons (upgraded n75, DV, things like that), a cat back exhaust (unsure of brand), 90k miles was just passed last week. Timing will be done in the spring.
The car has no stutters upon acceleration and idle is staying pretty consistent about 900 rpms. I know there is an exhaust leak, at the flex pipe as I seafoamed the car this fall and discovered that. My question is, which down pipe to you suggest to be the best for the money? I've seen a bunch of different brands, weather it be 42dd, ecs, places of the such.
Would it be cheaper and more efficient to just get a turbo back or stick with the cat back and stay happy? Also, I'm assuming if the leak is in the flex pipe, that the down pipe needs replaced all together. The car DID have a check engine light, for the leak. Since winter the cel has gone away and the gas mileage dropped drastically. When I get a new down pipe or fix the exhaust leak, I also want to change the rear O2 sensor. I believe personally this maybe causing my gas mileage info.
Lastly I have a fuel filter to replace the oem one that's been in there. The same thing happened to me last winter and when summer came around, the gas mileage went up to normal 300-330. I drove to h2oi and was getting well over 30 mpg. Now I'm lucky to get 18mpg.
Well I first had a slow leak, which was happening because I had a bad O-ring for my coolant temperature sensor. I replaced the O-ring, and I also replaced the whole coolant flange for good measure. After that I added some coolant, and started her up. And before i knew it, there was a pool of coolant under my car. It seems like the hose coming downward from the flange is swelling up (look at the pictures). But I have no clue what this hose is, or what it does.
View 10 Repliesits cracked and its leaking i was tld its 210 dollars to replace it... what is the part number for this??? or is this not that bad of a deal?
View 2 RepliesSo I noticed one day when I was standing outside of my car right after I had turned it off that I could hear the coolant bubbling some. I had just recently flushed the coolant, put on a new water pump, thermostat, and put in a new reservoir with a new cap so I figured it was just some air in the system because there was air in the top radiator hose. So I just worked the air out and thought that was it. The next time I drove my car it did it again and there was no pressure release when I took off the cap either. I ended up getting the head worked on (valve job and check the head for warping). Even after all of this my reservoir doesn't seem to build pressure and every time there also seems to be air in the top radiator hose. After the car is warm I can work coolant back in the hose and 5 minutes later theres air back in it. I've pretty much replaced everything with the cooling system besides the hoses within the last year so I don't know what it could possibly be.
View 2 RepliesI think its a flange that connects to hoses, they want to charge me 140 to repair. would this be something i can do myself?
View 5 RepliesI've never had a leak before in my anniversary and now all of a sudden I have a coolant leak. Once I start the car and run it for a short time and shut it off I lose a few ounces of coolant. I inspected under the hood and the coolant seems to be leaking onto my tranny. I am unsure where exactly it is coming from.
View 17 RepliesHad it done at 87K years ago. Coolant light came on car had been rattling. Parked and coolant came leaking out. At 157K now was gonna replace belt at 167k, that's 80k since the last job. My guy says had I drove it further would be looking at a new 1.8t.
Does this sound about right to you since it's been 70k since that last timing water pump job. Why didn't the car overheat? Chipped at 40k with apr and very conservative driver. I suppose it just depends on too many variables why the job needs to be done 10k before I originally planned to do it.
I replaced my timing belt, tensioner and water pump last weekend because I noticed I was leaking coolant from the water pump. The other day I popped my hood after driving and notice the reservoir bubbling a little bit because it sounded like the coolant was boiling and the line coming into the top of the reservoir felt hotter than normal. I opened the cap slowly and never heard any pressure release. I figured it was air in the line somewhere so I tried to work the air out. It sounded like the air came out and I took it for a drive and I finally heard pressure release after 3 different attempts. I opened the cap later when it was cool and noticed that the coolant was still at the original level.
Then the next day I was driving and came to a stop and noticed white smoke coming out when I gave it gas. It still drove fine though. I pulled over and opened the cap slowly but didn't hear any pressure release. I put in a little bit of radiator sealant and it seemed to do the trick.
The car has never overheated and there's no oil in the coolant or coolant in the oil. The heat also seems to be working correctly and my fans come.
This is my second vw I've owned and now I own a 20th ae gti. Just the other day I got out of my car and smelled antifreeze. So I popped the hood and realized there was no coolant in the reservoir.. So I went to my dealership, put some in... well that obviously isn't my problem, because the next day it was gone. Again. This is on sunday so I can't do anything about it. I made an appt to drop it off tonight @ my volkswagen dealer. It's not leaking, not smoking or burning, and the temp gauge isn't moving at all.
View 20 Replies2003 Jetta Gli seems to have a very small coolant leak. The leak is small enough that I don't even notice a puddle on the ground the light on the dash told me it was low. It is the Vr6 motor. Also I don't know if this is the right forum for my car the title says 2004.5 Gli mine's an 03. If this is a big deal just let me know and I'll delete this post and go else where.
View 4 RepliesRecently its been pretty cold here, and in the morning or when it sits for awhile i start her up and about 10secs after i start her the little "stop" light comes on and says "check coolant". so went through all that, checked the service manual and dont see any red flags. and if i were to turn it off and then turn it back on it wont show again... but still curious.
View 6 RepliesI've had the car about 3 months now. It runs fine, never overheats, but I keep having to add coolant (every 2 weeks or so), but I can't see a leak anywhere.
I searched and found one guy that said it could be a bad expansion tank cap, and another that said it could be a tiny leak that only leaks when driving.
Anyway, when replacing my axle, I noticed this:
If that's dried coolant, where would that be from?
I'm looking to upgrade my exhaust system. From down pipe on including a cat. P-chip and p-flow air filter installed on GLI
View 5 RepliesStop check coolant light came on dash tonight. Scanned the car no code. Did a search pointed towards coolant temp sensor. Car had it replaced by vw estimate of 30,000 miles ago. I tried to see if its green top sensor appears the very bottom ring is green but top is black maybe vw's is different than ecs? Planning to do water pump, belt kit from ecs anything else i should be looking at?
View 1 RepliesLast night I went to drive my car and my coolant light went on. I checked the overflow and it was very low. There was barely any left in the overflow. I thought this was strange because I had just checked the coolant a couple days ago. The coolant that was in my car was an orange color (after searching I realized that I think this is g12 which I was unfamiliar with). Before searching I added Prestone 50/50 pre diluted green coolant. The bottle said it was mixable with any type of coolant color or kind. After reading more threads I'm seeing that I think the g12 just contracted with the cold weather and I should of just left everything. I have barely driven the car since adding the prestone. Am I doing harm mixing in the prestone? If so, How can I fix this?
On another note, With the cold weather my temp gauge seems to be acting a little funny. Once the car is up to operating temperature the gauge will then drop around 40-50 degrees. It will then stay like this while im driving, but then will go back to normal once the car is stopped and running.
I have a 377 gti 2002 and just the other day i had some hesitation on take off. it sounded like the engine was cutting the fuel, at the time i had an o2 sensor code so i replaced the o2 and got new spark plugs while i was at it. it was still hesitating and cutting out so i figured it might be the maf because ive already replaced it once, i cleaned it and still doing the same things. i called my local vw/audi shop (audub) and he said it might be the pcv valve. i checked to see if there was air sucking in through the oil dip stick and the oil cap. its running just fine at idle and it seems that in first and second gear that its hesitating at 1000-2000 rpm and the higher gears are fine. could a leak cause this or is the pcv system bad?
View 7 RepliesI just threw a check engine light saying that there was increased air flow in the secondary air system...what does that mean????
View 15 RepliesBought a 04 GLI had the bad engine, had the engine installed sat at the shop for nearly a year. Towed car to my house to finish it and now I am running into their lack of knowledge and fixing their crap. Now the current issue...On the thermostat housing, a nipple that comes off the side has nothing connected and leaking coolant.
View 7 Replies