2003 Tiburon Question PLEASE PLEASE HELP.......

[Bottle Fish]

I have an 03 Tiburon that when driving will will jolt and shake sometimes violently. The first time it happened I was trying to pass a car. Now when driving it it seems to be doing it at low speeds depending on how much gas you give it.

I brought it in to one guy who said it simply needs a tune up. So I did and what do ya know it still is doing it. Told ya so. Just got home from Aamco where they did a Trans scan and said they really don't know what it is but said as far as they can tell the engine including the Transmission is fine. They also said they have never seen this before, I quote "Its weird".

They did read 2 codes that were stored though.

1. Map sensor circuit low

2. Output speed sensor circuit

They said that the speed sensor is possibly causing ABS or Traction control to activate.

Please any and all info on fixing the situation is welcome along with any other questions you may have.

[bradley olson]

i had the same thing happen to me but mine was in a 97 chevy 1500 and it was the speed sensor. it would jerk like the trany was going.

[Jeremy airjer W]

The check engine light is currently on right?

The output speed sensor should be a slam dunk for the Aamco guys to figure out? The output speed sensor is used to confirm the correct output of the transmission as well as feed the vehicle speed to the computer and speedometer (basically).

The output speed sensor would not have anything to do with the ABS/traction control as they use the wheel speed sensors to gather information. If the vehicle had some variation of stability control than the output speed sensor may be used as well as a host of other sensors, as an input to determine what course of action was needed.

If the check engine light is on than a theoretically traction control and stability control should be disabled. This is because the two systems no longer have any idea if the vehicle is capable of producing the performance that the two systems use as a base.

If the MAF sensor is flaking out it can cause all kinds of really goofy problems. from lean missfires, no power, no start, start and stall, poor idle, etc.

It should be pretty straight forward as far as figuring out if these two items are related to your symptom. It can't be down without having a scan tool capable of showing data.

[Bottle Fish]

There is no check engine light on.

The slam dunk was not at the Aamco I went to I guess. They could give me no definite answer as to what the problem is.

Brad I hope your right. Sounds cheaper than a tranny would be.

Appointment on Wednesday with Hyundai. I basically told them you made it, you better be able to fix it.

[bradley olson]

my check engine light never came on but my abs light did. changed the speed sensor abs light went away and truck has been good ever since.

[Jeremy airjer W]

I look forward to hearing what Hyundai has to say!

By the way, welcome to FM/HSO/IceLeaders Bradley!!

[Bottle Fish]

I will let you know what Hyundai says.

Welcome to HSO Brad.

Thanks for both of your inputs. Love the avatar airjer. That's funny.

[bradley olson]

thanks. good luck hope they can find whats wrong with it.

[bradley olson]

Subject: Wheel speed sensor may cause engine-control problems.

Vehicle Involved:

2003 Hyundai Tiburon

Condition: Some Hyundai’s without Anti Lock Brakes are equipped with wheel speed sensors. Vehicles listed above that have 2.0 liter 4 cylinder engines use the front right wheel speed sensor input for engine control data. In these vehicles the engine control computer compares the right front wheel speed sensor signal to the vehicle speed sensor signal. The comparison of signals tells the computer if the car is being driven on a rough road. If this is so, the computer shuts down the engine misfire monitoring system. If the engine control system does not receive a signal from the wheel speed sensors, it will illuminate the check engine light. Trouble code P1502 “Short or open wheel speed sensor circuit.” You can check the circuit with a digital volt-ohmmeter. Resistance should read about 1.4k ohms.

[Bottle Fish]

Mine is a 2003 Hyundai Tiburon GT V6 2.7L with Anti Lock Brakes.

[Jeremy airjer W]

I couldn't find any bulletins like that for the 2.7?

[Bottle Fish]

Hyundai says I need a new Tranny put in that will cost me around $2100.00 bucks. So tonight I think I'll have about 21 beers and figure out where to get that money from. I really question why Aamco the Tranny Experts (or so they claim) couldn't tell me that.