Originally Posted by 4runner970

Hey!

Any updates on your issue/ fix after this long?

I just began having the same exact issue about two weeks ago, where I found myself stranded on the side of the road at an idle with no throttle response. The VSC , TRAC, and CEL all turned on at the moment I lost throttle. I cycled the ignition once by shutting off and starting the car, and it seemed to fix the problem. After getting home and doing a few test drives, the same throttle cut-out issue was happening under acceleration and load.

After some quick searching I decided to order a new 4 prong TPS from Aisan part#(89452-35030). This is the cheapest way around changing the TPS without changing the whole Throttle Body on a 2001-2002.

All of my check engine lights went off, and the issue seemed to be fixed for about a week, until it came back this evening on the drive home.

My only other idea for this very specific issue is a throttle body replacement, possibly a used one off of a junked 2001 SR5.

I am getting a P1120 code which my Blue Driver says: Throttle/Pedal Position Sensor/ Coolant Flow control ValvePosition Sensor Circuit
Does this mean I should look at the PPS now? Not sure If I could even get one of those

Any updates at all since doing it in 2021 would be GREATLY appreciated!

thanks!!

logan

Originally Posted by gruenegenes

The power loss is back along with code P1126. If anybody has made progress on this please let me know. I’m going to take it to a shop to try to diagnose.

Originally Posted by 96RedRunner

A cog or key issue I don't think that'd be intermittent. I do know that a bad/intermittent ground can raise cane.
There is a grounding bundle attached to intake behind engine dianostic port that if loose will cause these symptoms.
My case was loose from VC job, that'd be first place I'd look. Don't just check tightness check for corrosion their dissimilar metals sand em clean.

All I got.

Originally Posted by gamefreakgc

That's an extremely uncommon code. I had to look it up in the FSM and this is what it says:

DTC P1126 Magnetic Clutch Circuit Malfunction
CIRCUIT DESCRIPTION
Magnetic clutch is mounted between the throttle motor and the valve, and it connects the throttle motor with the throttle valve. Therefore, the throttle motor opens and closes the throttle valve through the magnetic clutch. If the electric throttle control system has a malfunction, the magnetic clutch separates the throttle motor from the throttle valve in order not to operate the throttle valve by the throttle motor. If this DTC is stored, the ECM shuts down the power for the throttle motor and the magnetic clutch, and the throttle valve is fully closed by the return spring. However, the opening angle of the throttle valve can be controlled by the accelerator pedal through the
throttle cable.

Sounds like your throttle body motor is to blame, or at least the ECU thinks so. I think a shop will just result in throwing parts at it as I don't know where to even begin diagnosing this one without throwing parts at it.

Originally Posted by gruenegenes

Update: I took it to a dealership for the first time yesterday and by the time they got, it had thrown a new code, P1129, which I guess is kind of encouraging because the procedure in the shop manual for this code is to replace the ECM which I was considering anyway. I found them refurbished by these folks for $255. It’s either try it or sell the vehicle. I’m gonna give it a try. By the way, the problem is gone again :-)

2002 Toyota 4Runner 3.4L - PCM ECM ECU | 89666-35591 | Flagship One