Throttle Problem

[Importefx]

Listen guys heres the story.. I had the car at the dealer because it started to run really rough and it only has 20,000 miles on it.. They forgot what is was there for and did an oil change.. Yes, they forgot to put the oil in it so on the way home my oil light came on and right away my motor started making alot of noise.. In the long run it seized my motor... They do not wanna cover it because i had a supercharger on it about 5 months ago, needless to say it was not on the car when they did the oil change... Anyway i need the car so i put a motor in it, as soon as i turned the key i got codes for my throttle sensor, im a mechanic so i tested everything ends up it went bad during the swap so i put one in and i am still haveing the same problem i hit the gas and nothing happens.. the car idles and thats it.... I really need this car back it has been like this for 4 months now and i miss driving it.. I have a feeling something happened to the computer because i did all the tests you can think of and followed every single wire in the harness and they are all ok... Does anyone have any ideas please help me!

[navylife59]

That really sucks. The Dealer had better not stuck you with any costs. The TRD S/C is fully warrantied whether Dealer installed or not. At the minimum of 12 months/12K miles. Either way, if it is not on the motor, how can it have been the problem. Scion techs are actually Toyota techs whom have very little, if any, training on our cars at all.

Anyway, that is a different topic all together. Now for your current issue. What codes are you getting now? The TB is drive-by-wire. Did you check the accelerator pedal potentiometer? You are probably experiencing the following:

FAIL-SAFE
When any of these DTCs, as well as other DTCs relating to ETCS (Electronic Throttle Control System) malfunctions, are set, the ECM enters fail-safe mode. During fail-safe mode, the ECM cuts the current to the throttle actuator off, and the throttle valve is returned to a 6.5° throttle angle by the return spring. The ECM then adjusts the engine output by controlling the fuel injection (intermittent fuel-cut) and ignition timing, in accordance with the accelerator pedal opening angle, to allow the vehicle to continue at a minimal speed. If the accelerator pedal is depressed firmly and gently, the vehicle can be driven slowly. Fail-safe mode continues until a pass condition is detected, and the ignition switch is then turned off.

FAIL-SAFE CHART
If any of the following DTCs P2120, P2121, P2122, P2123, P2125, P2127, P2128 and P2138 are set, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily.

HINT:
*: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.

I really need your codes to focus down on the problem. Does the engine idle normally or is it severely rough?

[Importefx]

are you getting this info from All Data? LoL because that says the same thing.. the codes are
P0222
P0221
P2135
and i have an evap code that i forgot the code off the top of my head. i checked everything i can think of and im just out of ideas i do not understand why after i did the swap all this went worng you know?


and no i have paid for everything so far i am out about 3000 and took my old motor apart and i am now going after the dealer because i have proof that they did not put oil in it.... but yeah, like i said im out of ideas if you have any new ones i will be very happy if they worked. LoL

[navylife59]

Yeah, I had a dealer put regular oil in my Camry when I gave them Royal Purple with a special additive. Problem for them is that RP is not honey amber in color; Purple durheh. They paid for new oil.

There is too much data to post here. PM me w/ your e-mail address and I will send a copy to you.

All data from 2007 Scion tC Service Manual
Electronic Throttle Control System (ETCS)
P0222 Throttle / Pedal Position Sensor /
Switch "B" Circuit Low Input
1. TP sensor (built into throttle body)
2. Short in VTA2 circuit
3. Open in VC circuit
4. ECM Comes on DTC stored ES-105

P0221

P2135 Throttle / Pedal Position Sensor /
Switch "A" / "B" Voltage Correlation
1. Short between VTA1 and VTA2 circuits
2. TP sensor (built into throttle body)
3. ECM Comes on DTC stored ES-105

DESCRIPTION
HINT:
These DTCs relate to the Throttle Position (TP) sensor.
The Throttle Position (TP) sensor is mounted on the throttle body, and detects the opening angle of the throttle valve. This sensor is a non-contact type, and uses Hall-effect elements, in order to yield accurate signals, even in extreme driving conditions, such as at high speeds as well as very low speeds. The TP sensor has 2 sensor circuits. One circuit sends the VTA1 signal. The other circuit sends the VTA2 signal. VTA1 is used to detect the throttle valve angle and VTA2 is used to detect malfunctions in VTA1. The sensor signal voltages vary between 0 V and 5 V in proportion to the throttle valve opening angle, and are transmitted to the VTA terminals of the ECM. As the valve closes, the sensor output voltage decreases and as the valve opens, the sensor output voltage increases. The ECM calculates the throttle valve opening angle according to these signals and controls the throttle actuator in response to driver inputs. These signals are also used in calculations such as air-fuel ratio correction, power increase correction and fuel-cut control.

[Importefx]

I replaced the throttle body and i still have the same problem..I checked all the wires and they are all ok, i checked all the amps of all the wires to the throttle body.... I checked everything man.. LoL my email address is mleboeuf19@yahoo.com

[Jay6632]

@Navylife59 u seem to know exactly what your talking about.... i had a similar problem 09' Scion Tc no problems before then all of a sudden its in "fail safe mode" or something, the car will only do 20mph max dealership (stealership) wants $1300 just for the throttlebody assembly not including labor... i have no obd2 scanner....so i can not give you codes, is there any way to reset the ecu ... or find the code at autozone or something.... the car is not mine but its a good friends and id like to fix it for them instead of dropping $2000 to toyota dealership..... if you could help its much appreciated email is jeff_sixsixone@yahoo.com if you can help....

thanks jay6632

[navylife59]

Thanks for the confidence vote. I will try to condense the data into a format that I can export and send you. It will have to be sometime tomorrow. Check your email then.

AutoZone can scan your car for free but you have to bring it to them. ASk around to see if any has a scanner because you really need that code(s) to begin troubleshooting.

Scott