jaykappy

I have a mazda 3 5 door with a 2.5l
The car all of a sudden pegged a 2k idle with no action when I step in the gas. I can drive the car but only to a speed of the 2k idle...there is no response when I step on the gas.

Codes:
p0123 throttle positioning sensor/switch
p0223 throttle pedal positioner switch

I had the car in a shop and they replaced the whole foot pedal assembly
I brought the car home and replaced the complete throttle body with throttle positioning sensor
Both OEM parts.

i started the car and it was at 2k.
I then shut off the car disconnected the battery waited a few minutes.
I started it and it was a perfect idle with full action on the gas pedal. I thought it was fixed.
I placed it in drive and it went right back to a 2k idle with no pedal and the codes appeared again.
guy next store tried to clear the codes but they came back on in a few seconds.
we reran the codes and the same 2 appeared...

BUT i just replaced them....what the heck is going on....dont know where to go or what to check....PLEASE HELP!!!!

eggynatey

You car went into limp mode from the new TPS.

1st make sure everything's installed and plugged in correctly.
Now disconnect the battery, pump the brakes once or twice to remove any charge from the capacitor, and wait 20 min or so. Then reconnect the battery, start the car up and let it idle for +-5 min. The ECU should relearn the AFR/timing, etc and hopefully your problem will be solved.

jaykappy

Will do so...what does pumping the brakes do?

eggynatey

It'll make the brake lights come on and drain any residual charge in the system.

Hope this helps

jaykappy

First off thank for your response and thoughts.....so very appreciated...

OK I did what you said..

Disconnected battery
pumped brakes
waited 20 minutes
reconnected and started.
The car started fine and the engine light and anti skid/traction lights were off!
I let it run for 15 minutes .... dropped a couple times in rpm but kicked back up....was stead idle about 900. everything was looking good.

I shut the car off and restarted.....engine light and anti skid/traction lights came back on and idles at 2k....

as before the air conditioner does not work as well...just thought I would mention that. just blows hot air.

Both engine light and anti/skid light were on last night....did not disconnect the battery and when I did what you said today the lights went off....but after shutting off and restarting they came back. ugggggg.

I have the battery disconnected right now and will wait and hour or so and try again....

What the heck could be going on? any new thoughts or suggestions.

jaykappy

OK something else going on....I can start and get a decent idle AT traction control light is off....engine light is still on....
BUT if I push down on the wires coming from the ECM it sputters and then sends it to the 2k idle and the traction light comes back on....
It also does this when I put it in reverse...

if I push down on the wires at the top arrow...which pushes down on the collection of wires at the lower arrow if sends it to the the 2k idle etc...

Is there something I can check where these wires from the ECM go?????

how can all those wires have connectors and shrink wrap etc...we are the only owners so that came from the manufacturers?

Please let me know if you cannot see the image.

eggynatey

sorry I cant be more helpful. I don't even own a 3. haha! Just a couple older Mazdas. Seems like a wiring issue though.

I'm sure there's a lot more traffic/help/knowledge at some of the other bigger Mazda sites.

Try googling "Mazda MSF"

Oh, and piccy no workie.