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02/01/2021 4:24 am
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- Hey scotty, I have a 2012 mazda 6 2.5l dohc automatic. It was making noise, my friend who works on cars listened to it and said it was a wheel bearing, he was right. I went ahead and replaced all 4 of them myself, press in and bolt in, I did them one at time over the course of 2 days and test drove after each one. After doing the driver front one and test driving, I got the abs and traction control lights everything else was fine. I did the driver side rear 2nd, then passenger rear 3rd. The passenger rear was the noise culprit. Finally I did the passenger front one, after hard work and a lot of success and satisfaction I disconnected the battery and reconnected, hoping to reset the abs and give the car a chance to recognize all new bearings. After I reconnected the battery, the car wouldn't start, so I jumped it and finally got it started. I went for my final test drive and the original warning lights were on but the car got really sluggish as I was test driving, the AT started to shift hard and threw two codes: po500 for the speed sensor and po61b for internal control module torque calculation performance (once I get to about 20-25mph is when it would get sluggish and drag). Then the car idled weird and would stall out when I stopped sometimes. If I turn the car off and back on it would drive normal right up to the mph I mentioned and start all over again. I eventually removed the abs fuses and did an idle relearn, now it drives perfectly fine except the speedometer is all wacky. Yes I did install the magnetic ring on the bearing correctly toward the abs sensor on the knuckle. I need help figuring out what went wrong, bearing installation problem, bad bearing or something got fried when i messed with the battery, everything was fine up till the last bearing and the battery disconnect??? Also the alternator tested low at 8-9 volts. I do have a mechanic that fixed my old moneypit stratus years ago (insert laughing horse) that I trust. What did I do wrong and can I fix it or should I take it to him??
Good morning Specialagent8! Check all the grounds that you can see. Sounds like a bad ground to me and also check the battery volts. Hope it helps
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02/01/2021 7:53 am
Yes check the grounds grounds can go absolutely bananas and do really weird things when they don't supply full voltage
And of course check the alternator itself off the vehicle to see if it's good
