I have a 2001 Elantra GLS. The tranny shifts smooth. At around 40mph, it wants to shift into what I guess is overdrive. At that speed it is like it can't figure out where it wants to be and will down and upshift. Aside from that the tranny has no other problems.
View 5 RepliesI have a 2004 Hyundai Santa Fe with a 2.7 4wd. It has started fluctuating the rpm's and is shifting erratically. I have seen on here that it is possibly the TPS. Does the same in manual or auto.
View 3 Replies2002 Santa fe 2.7l v6 trouble code p1529 p0121 p0129 p0740...
I'm having erratic shifting problems and poor gas millage. The issue began approx 2 weeks ago and is always present. The issue is hard shifting between all the gears, jerking, high tac revving , difficulty shifting from 3rd to 4th gear and throttle at times unresponsive, and like i stated earlier poor gas mileage.
This past weekend I replaced the TPS, but the TPS codes are still present. One concern I have with the replacement is that I din't detach the negative cable, which I've recently learned should be done. So I'm not sure if by neglecting to remove the battery cable I may have damaged the new TPS.
Is it true that the negative battery cable should be removed with TPS replacement?
I've also read that a faulty TCM can cause these types of symptoms as well and one resolution may be to reset the TCM by removing both battery cables.
Any information on resetting the TCM? Also, in case I decide to replace the TCM, where the module is located ?
I have an 01 elantra that idles erratic while in park. Also when i remove plug wires from the number one and three cylinders it will smooth out which doesn't seem to make sense to me because they are being fired from different coils, but if i pull two or four it continues to rev. Could this be a timing issue, I have been told that it could be the IAC as well as the cruise control module, what was it?
View 1 RepliesI'm currently moving cross-country from LA to St. Louis. Had routine maintenance done b4 I left. I've only made it to New Mexico so far b/c my car is losing power after logging 250 mi. RPM's also become erratic. Doesn't completely stall, but won't let me go more than 45mi/h. After a rest break, the problem doesn't re-create.
At my first mechanic stop, the computer checked-out as ok. That mechanic changed the spark plugs and also told me the 2004 has no fuel filter (fuel filter being my suspicion of what was wrong).
Today it lost power again. Jim Bob at a rural garage said maybe the alternator or fuel pump. I have an appt. at Pep Boys tomorrow, as the dealers don't have any avail appts. until Fri.
The contents of my apt. are in the trunk and backseat. Is it worth it to remove them (to get to the fuel pump) at the cost of another hotel day, or should I limp home at 250 mi. a stretch?
I just picked up an 02 Hyundai elantra manual trans that needed a transmission. ran fine before I replaced transmission but after putting it all back together the car now how has an erratic idle. it will rev from 2-4000 rpms. I tried spraying for vacuum leaks idle didn't pick up any higher. replaced tps and iac and didn't make a difference. the only thing that did make any difference is unplugging map sensor. dropped idle to about 1200 rpm but ran rough. could this affect the idle.
View 1 RepliesMy friend was having trouble with her 2001 elantra. Her idle was erratic and her RPMs were constantly high. we checked every where for a vacuum leak but could not find one in any of the lines. We went on to switch out the idle air control valve, the throttle position sensor, and even cleaned out her throttle body. we threw up our hands and sent it to a shop. Come to find out there WAS a vacuum leak. apparently in the air idle control valve sensor there is a gasket that seemed to be missing. I of course didn't think about replacing a gasket when I replaced the sensor because I never saw one there.
View 1 RepliesI just purchased a 2005 elantra with 133k on it and she runs fine other than a slight erratic idle. And by slight I mean it will jump about 50-100 rpm idling and every blue moon it will jump up to 250 rpm sitting there. After idling for a while my CEL came on with the following codes.
P0507 idle air control rpm high
P0506 idle air control rpm low
P0170 fuel trim malfunction bank 1
P0121 throttle position sensor
What could be causing this? I took the iac off and cleaned it with maf cleaner but it didn't work.
My speedometer is erratic, not reading correctly, and the trans is not shifting right. It gets up to 3000 RPM and I have to back off the throttle to make it shift to 2nd. Then after driving a while everything starts working right. Next time I drive the truck it does the same thing.
View 2 RepliesI have a 2003 Ford Ranger, recently I had the heater core fail. One thing that happened during the heater core starting to leak is the "THEFT" light came on brighter than normal and no longer flashes when the truck is off. Also when the theft light started acting up the O/D OFF light came on and would not shut off. If I pushed the O/D off button the Theft light will go out and then come back on after the button is released.
After the heater core was replaced the lights stayed on as described above. Every once in a while the O/D off light would stay off but then come on later. No really problem besides the lights and O/D off button not working. Now today the O/D off light started flashing and the truck kept shifting in and out of O/D.
I'm leaning towards a speed sensor issue. I'm going to check and see if there is any codes tonight and will post my results. One other thing that happen with the heater core leaking is the "CHECK ENGINE" light came on because the O2 sensor was shorted out. Have the O2 sensor now and plan on replacing it while I trouble shoot the erratic shifting in and out of O/D.
My car is a 2002 Hyundai Elantra with an automatic transmission. It was bought with about 79k miles on it and currently has about 94k miles. Last week I began experiencing rough shifting between gears. My CEL had been on for a few months but I wasn't having any performance problems so I ignored it. When I started having shifting problems I went to autozone to have the codes scanned. All that came up was P0441. I cleaned the purge valve and cleared the code. The CEL stayed off.
I continued driving and having shifting problems. The car slipped out of gear when it wanted to upshift. The engine revs until I release the gas. Once the rpms drop low enough the next gear would engage. This seemed to happen for every gear shift except 1-2. For my first few trips no CEL.
Finally, yesterday on my way to work I got a CEL, and it was intermittent, similar to other issues I had read about. However, the more I drove the car, the worse this problem got. It would not stay in gear while cruising down the road. I tried changing gears manually, revving the engine up and letting it drop to idle, but nothing would work. Luckily the car got me to work but it was a real jerky ride. Towards the end it didn't even want to take off from a stop. And it wasn't in third, the engine just wasn't engaging the transmission. It's like the car was in neutral. But moving the gear shifter didn't seem to work.
The car did not make it home, however. When I started it after work, it went fine for about 2 blocks and then started slipping. Within a quarter mile I couldn't even go in first. Turning off the car and waiting a few minutes, then going again would gain me some distance, but the car would start slipping again almost right away. I was able to turn around and park the car in my work's parking lot.
The problem is I have no way to pull the DTC's now because the car can't make it very far. If it's something simple like the input/output speed sensors, I'll replace those in the parking lot. I'm a DIYer and hate paying others for what I can do myself, but I may need to bite the bullet on this one.
I bought my 2005 automatic 4 speed Elantra knowing of this problem and feeling good about being able to track it down. how ever This did not stand to be the case. Start up cold shifts through every gear smooth as silk with know slippage or harsh shifts. roughly 10 to 15 mins after the car reaches operating temp on the gauge it begins to slam into 3rd gear only. Most of the time it is a double slam. Like bam bam real fast but indeed does shift into the 3rd gear then into over drive smoothly. I can duplicate it any time i desire to by merely pulling it back into 2nd gear and manually pushing the shifter back up to 3rd. it will slam every time with out fail. The man i bought it from told me he had this trouble and changed the transmission out with a 500.00 used one and did the exact same thing...
So I felt must be electrical wiring or TCM bad but upon examination i found no codes present to date. he threw parts at it and replaced both input and output sensors based off some thing he read on the net. also he said he replaced the TPS with a TPS from a wrecked car, still same harsh shift. he however could not remember how the fluid looked upon changing it and the filter as he also did that, nor can he remember what fluid type he used. I know shot in the dark right??? What is the actually fix such a hard slam when shifting into 3rd.
My car literally started doing this thing where it sounds like a vibration or humm when putting my Elantra into reverse.
View 2 RepliesI have read the common problems and went ahead and replaced the Throttle Position Sensor, TPS. Also had a complete tranny flush done. The shifting problem persists, when I drive around 25-40 mph, the car will constantly upshift or downshift on its own even. Sorta like I get to 30 mph and it suddenly decides to downshift, like it has become ultra sensitive to minor increases in torgue(?) or can't decide if it wants to be in 3rd or 4th gear. Did check with Jiffy Lube to make sure they replaced it with SP3 fluid and they did. What else this might be? Check engine light comes on now and then and currently is off.
View 1 RepliesI've been hearing a quiet 'thump' when shifting. In particular, when first letting up the clutch starting out in 1 but also when shifting between gears when the clutch is fully down such as from 2->3.
I thought perhaps a fluid change was in order since I'm at 110,000 miles. It didn't make any difference. (I used Mobil 1 GL5 which according to independent tests is safe on yellow metals.)
So then I wondered if it's the engine mounts, but I'm not sure what it sounds like when they need to be replaced or if simply shifting between gears while driving as described above would cause a worn one to 'thump'.
i have a 2001 elantra with 136k. the automatic transmission (which otherwise shifts very smoothly and shows no sign of problems) shifts suddenly and erratically when i'm driving at a constant speed. I'll be traveling along (speed doesn't matter), and it will suddenly downshift, then upshift, then downshift, etc. this started off being very occasional, but now it randomly shifts every 5-10 seconds.
I've changed and checked the fluid, and tried replacing the Input Speed Sensor and the Output Speed sensor...that didn't fix it. it also does not blow a check engine code. I'm convinced there must be a sensor somewhere that is faulty. it really seems as though the transmission is electronically confused.
I have a 2001 Elantra gls which I bought a year ago. It had shifting problems from 2nd to 3rd gear with CEL on. I replaced the input and output speed sensors and connectors and fixed the problem to a point. It was still shifting a little hard even after a fluid change with SP111. I added 2 bottles of Lubeguard red and it has worked immensely almost to the point of no problems....except. At slow speed shifting like going into a store parking lot or on a freeway with stop and go traffic, it will shift hard from 2nd to 3rd (I think) maybe 1st to 2nd not sure. If accelerating at normal speed shifts fine. No cel and the tranny fluid is on the full mark, not overfilled. Would a wheel speed senso cause this or damaged clutch pacs maybe?.
View 4 RepliesI am having a slight hesitation problem on my 2002 gls. When the car is cold and I am shifting with low rpm there is a slight hesitation untill higher rpms then it seems to clear. I wouldn't say a "stutter" or enough to "buck" the car but definitely noticeable. The strange thing is when the car gets up to temp it seems to stop. Almost like a carb on an older engine.
View 3 RepliesAll of a sudden my fuel consumption dropped from 28mpg as read from the computer display in the dash, to 21mpg. This was not a gradual drop, it was at 28mpg one day and 21mpg the next day. There is no service light on, do these cars produce codes that don't trigger the service light?
A few months ago the vehicle was getting stuck in various gears and lunging, this was from battery corrosion dripping down and eating away at the transaxle range sensor. I cleaned up the battery and replaced the range sensor and the vehicle was driveable again. It re-learned the shift timing and seemed to be ok, then about a month ago it seemed to be forgetting the learned shift positions after sitting over night, I replaced the battery, thinking it was in a marginal state where it would forget the program while sitting. The shifting is still hard sometimes but this seems to have worked but, now my mileage is horrible.
I thought I'd just change out the oxygen and air flow sensors but, then looked at how much they cost now, and realized this would be some costly trial and error. Is there a methodical way to troubleshoot this issue, any way to pull the sensors and measure them?
2002 elantra gls 125k miles, Automatic
I have a very intermittent problem starting the vehicle first thing in the morning ( this has happened twice this week, but only 5-6 times in the past year or so). It will crank and sound as if it just about to start, but not quite fire. After 5-10 mins of cranking, shifting into and out of gear, rocking vehicle (not sure what actually causes it to start, if anything) the car fires and runs just fine, starting normally until the next "event".
Plugged it in and got no codes.. The only difference I can see is that every time this has happened recently the car has been parked in a parking garage at work on a minor incline for about 13 hours.
I recently purchased a 2005 Elantra Automatic, my question is, when shifting it out of park, the shifter doesn't stop at "D" but at "3" is there an adjustment or is it just a quirk of the car?
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