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Possible bad ECU???

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Old 05-04-2012, 08:46 AM
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Possible bad ECU???

For the last couple weeks, I have been getting engine coders of UO155, UO101 and UO122. These correlate to the traction control system and communication with the dash. Today, I was driving to work and about 2 miles after I left my house I am pulling up to a stop light and feel the car jerk like it downshifted...however I was already into 1st gear so I thought that was odd. I stop at the stop sign and look down to see my traction control light is on along with my engine light again. I use my scangauge to immediately pull the code and see that it now is throwing a P2135 code. So I go to pull away from the stop sign...nothing. Pedal to the floor, car will not throttle at all. The only reason the car was moving was the usual moving it will do when in drive and you let off the brake but it would not respond to the gas pedal at all. I kill the car, start it back up and it works fine. I get to work and research the code to find out this one was for the throttle sensor 1.

Now with all this going on...possible ECU issues...or just everything is starting to flake out on the car at the same time???
Old 05-04-2012, 10:01 AM
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Nah, it could be just a loose or corrode connectors, or just bad throttle body.

check all connectors first. I mean Mazda is stupid not to include a sensor on the ECU board to check the temp there on early version models. but it shouldn't fried that easily, unless your alternator went kaboom and decided it should pump more than the onboard voltage regulator can handle.
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