My engine doesn't run smoothly (like a misfire) when accelerating at hwy speeds, especially when the outside temp is above 20 degrees... the warmer the temps are, the worse it is.
I have a code P0431 - "warm up cat efficiency below threshold (Bank 2)"
Is it an O2 sensor problem, and if so, which one is it and what is the Hyundai p/n for the sensor? Bank 2 is in the front, correct?
2005 3.5L FWD. 5 days ago I left the house, the engine was running smooth at idle but having hiccups when accelerating. Check engine light went on when accelerating but going off at idle. Turned around at the first stop light, parked the car home and pulled code P0302 misfire on #2 . Figured it's most likely the coil, was going to order one next day but to my surprise, no more check engine light next day and engine has been running smooth since then. Probably drove 100 miles since with no issues. I have 6 spark plugs waiting to be replaced but it's too cold to do it right now unless it's an emergency. Car has 105k miles now, spark plugs were changed at 63k. Was this just a fluke and P0302 will probably not come back or should I not risk it and just go ahead and replace the coil? If I end up replacing the coil, should I do one coil or all three?
View 22 RepliesIn my 2003 3.5 awd I successfully got my used transmission in and running great. I made the mistake of washing the engine. Now, it runs like Cr@p. It pops and sputters. At one point the CEL came on with 7 codes mostly misfires. It ran ok prior to the bath but I am getting ready to do the timing belt and wp and plug wires. In the meantime, whats the most likely cause of misfires after a hosing down on these engines? I'm leaning towards plug wires or coils...
View 3 RepliesWhen I bought the car a few weeks ago, there was a p0507 code for a high idle in park, about 1300 RPM, but sometimes shooting up to 3000 when I shifted into park and then dying down. The code goes on and off intermittently. Not that big of a deal at first. Then I started noticing that if I revved it in park it would take forever to die down to 1300, and sometimes would fluctuate around 2000. I also noticed hesitation while accelerating around 1500 RPM and the transmission hunting for gears while accelerating, as well. I noticed my throttle cable was very slack so I tightened that, and bought myself a throttle position sensor, thinking that might be the problem, but didn't install it yet.
I was driving on the freeway yesterday in cruise control and then I started losing power while my foot was on the gas. With my foot on the gas, the throttle would cut out every second. I was basically one second of throttle, one second of no throttle, all the way down the highway. Almost impossible to drive. This continued even after I turned cruise control off. I limped my way to Home Depot and installed my TPS in the parking lot, and drove most of the way home with no issues, although I still noticed a slight hesitation while accelerating. Alas, I tested cruise control again and then the throttle on/off problem started again, then I could barely drive the thing, even after cruise control was off again. I'll be returning the new TPS to Autozone today, since apparently that's not the problem. What's my next move?
Recently replaced plugs/wires on soon-to-be 10 year old '04 SF 3.5L (157K mi.) for the first time.
Plugs were OE Champion Platinum and all 6 looked identical except for excessive gap of .010 +/- due to all the miles. Replaced plugs with same as OE. Old plug wires looked good, but replaced them with aftermarket wires ( fit was as good as OE). Also replaced plenum gasket.
Problem is: engine runs rough at idle and high rpm and appears to be mis-firing. CEL is off and code reader shows no Trouble Codes stored.
In the last year and a half I have developed a problem with my truck missing under a very specific condition. It only happens when the humidity is 100%, either right before, during, or after rain. When it's at 100% humidity outside, the first time I start the car for the day it starts missing. This continues until the truck comes up to full temperature, usually a about three or four miles, then it clears up. By the way, snow doesn't cause this unless its mixed with rain.
My mechanics are at a loss, say there is no info on the diagnostics. Since this started, I have had an inclusive tune up, they replace all plugs and wires, I've had all belts and the pulley replaced, and I've changed the intake air filter twice.
My car is misfiring, codes p0171 and p0300 come up on the code reader. It idles rough and has very little power. I have checked my exhaust , it is not plugged. When I unplug coil #2 while idling there is no change as to the engine performance so I switched the coils around with no difference when coil is unplugged on cylinder #2. I have changed the plugs, there is power to the coil, all plugs are firing and when removed plugs 2 and 3 are wet with fuel indicating I am getting fuel and fire. I have replaced the cam sensor with no change.
View 3 RepliesI have an 2004 Santa Fe and im having some Mass Air Flow Sensor problems but I dont know what's wrong. My engine light came on for the second time after awhile. And I got it checked for the code and of course it was my sensor again. The first time I just giggled it around and the light went off. I did the same thing today with giggling it again went off. So I feel like it might be a loose connection but I really hope it isn't failing because im pretty sure that's uber expensive to fix.
View 2 RepliesSo the check engine sign came up on my car and using the OBD it tells me the error is P0113. After googling the information, it looks like I have an issue with IAT sensor.
I opened the air filter and what I believe what could be the sensor and there was nothing clogging up, so I'm assuming the sensor needs to be replaced
Question is where is the IAT sensor located and how do I dis-assemble it so I can replace it. Is it the piece that is located just before the air filter?
Check engine light came on and stayed on today. Engine lost almost all power so I guess I was in "limp home mode". CEL ODB-II code was P2138 according to AutoZone.
Accelerator position sensor malfunction
Probable causes:
1. Open or short circuit condition
2. Poor electrical connection
3. Failed APS.
After turning off the vehicle, it seems fine at least in town but the check engine light is still on. This is the first "problem" with the vehicle and it's at about 98K.
I just joined the forum mainly to care of my dads 2001 Hyundai Santa Fe but also I got a check engine light on my way home from work last night.
From last night I saw that oil was all over the timing belt. Today I inspected it with a Coworker and his OBD II reader.
Error Code was P0455, EVAP - Evaporative Emission Control System Leak Detected (gross leak).
Now the oil leak is stronger since the oil spills is on hood (inside hood). I will make a picture tonight when I get home.
I personal think it's leaking from a tube/ valve on top of the timing belt (picture will show more tonight). Thinking of cleaning the timing belt area, then drive a little around or leave it in idle to spot where the leak is from.
Common issue? I googled around but since P0455 is a common issue (on my 9-2x as well) I couldn't find anything about this I am also limited from my search since I am currently at my work PC incl. strong firewall.
I will see if google let me find a picture...
Engine light come on and everything is running great, this morning got this error code U0d00. Went to advanced auto and had them run a scan.
View 5 RepliesTrying to get my daughters Santa Fe going. Engine stalling. Idles very slow. 2001 model with 2.4 engine, auto trans.
Code P0102 is active. Cleared with scan tool and it comes right back.
Replaced the MAF and no change.
Checked the intake for leaks / vacuum leaks and none found.
Checked for debris up-stream from MAF and all is clear.
Air filter is clean and dry.
Checked harness plug and found the pin 5 has 4.6 volts on it from PCM. This is the signal wire from MAF to PCM. 4.6 volts is KOEO.
IS THIS NORMAL OR IS PCM BAD ??? All other pins / voltages on harness plug are normal.
I have a 2005 Santa Fe with the 3.5 with 112000 miles on it. I had the engine light come on with the code P0302 cyl #2 misfire, I got spark plugs, plug wires to do a tune up on it. I changed all of it and got it back together, started it up and it still had a miss to it. I then took the front spark plugs out and did a compression test on it. #2 was at 85, #4 was at 120, and #6 was at 160. I couldn't check the back cyls because I had already put the intake back on. I then did a wet test, and all the cyls came up to 160. So this tell me that the piston rings are bad in #2 and going bad in #4. I have kept all the oil changes up and up to this point I haven't had any trouble with it. Having this problem with there 3.5?
View 1 RepliesCheck engine light on, car stalled once. Pulling code p0320 "Engine Speed Input Circuit Malfunction." Tachometer works intermittently. Where do I start?
View 2 RepliesRecently got check engine light fault code p0320
2005 3.5 with 172k miles
I have a 2001 santafe with a 4 cyl The code 102 was up so I replaced the mass air flow censer . I go on a test drive and the light stays off , but when I go to re start it again the light come on and stays on, with the same code. The only strange thing is the idle will raise for a min then drop down to almost a stall.
View 2 RepliesI got an Error Code of U0D00. What this is or means. The scan tool says to refer to your manual but I don't have one.
What the vehicle is doing is that it will work fine for a while then when you stop (in park) the engine will rev really high and back down all by it self for example. It will go up to 3.5 and back to 1 rpm repeated. Then when you start moving the car it will continue to idle higher like you are pressing the gas. During all of this the check engine light will appear?
My check engine light came on the other day and the code stated the the "throttle position is open" so after researching and everyone telling me that i need to change the sensor. I did everything after was fine running better but today only after 3 days replacing it i get the same problems. car has no get up and go hardly can push to 20 mph and when in idle i press the break it starts to bog down and almost want to shut off! and can be really loud...
Santa fe 05' 3.5L ....
I went to my local Autozone today to have a code read and get the freeze frame data. I got a code P0118, Engine Coolant Temperature Circuit High Input. I called the dealer but they are out of stock on the sensor. Would it be a problem to use an after market sensor? I'm just concerned about the quality and accuracy of the sensor.
View 5 RepliesEngine light is one for about a month and finally got an ODB II.
Today it reads the error code [b]P0118 which is [b]Engine Coolant Temperature Circuit High Input
The coolant sensor reads 45 C when the key is on "on" position at about 2:30 pm this afternoon and I start the engine about 2 mins the temp jumps to 68 C, are these some logical number?
Does it mean the bad temperature sensor and I need to replace it?