2007 Toyota Tundra 223k miles. I changed both rear wheel bearings and seals. Then my truck started throwing U0126 code. I plugged in my code reader and in live data mode drove the truck. All the abs wheel speed sensors are working properly. My abs light is on. My skid control light is on. The abs skid system is disabled. Had the shop bleed the brakes. Brakes work with stiff pedal. Speedometer is jumping. When I drive, the live data on scanner says steering angle is -503 degrees no matter how hard I turn left or right. My assumption is the Panasonic made angle sensor clipped to the back of clock spring cable in steering column is dead. Its coincidence it happened after rear wheel bearing replacement. Any thoughts? The dealer wants $1200 to replace sas and clock spring.
And the official diagnosis is a bad steering angle sensor. It cost me $390 to diagnose when I already had the part coming to me off ebay used. The sensor is $350 at the dealership. It was $80 used with a guarantee of a year. My stupidity not waiting for the part!!!!!!!!!!!! {black}:deceitful:
Replaced the steering angle sensor today. It did not fix the abs and Trac lights. Codes won't clear. I think the drivers rear new wheel bearing from Koyo is defective. Its a sealed bearing but leaking grease on the sensor. The other side is not leaking. I bet the machine shop damaged it pressing it on. The abs sensor mounts in the bearing flange. The tone ring it reads in the bearing could be damaged.
The dealer mechanic says there are can bus communication issues and might be a broken wire. Dash may need to come out.
The sensor (if bad) is about $275 at Parts Geek. You could probably save half the dealer cost if you did it yourself. I agree with Scotty, the dealer messed something up but good luck proving it.
I may have it figured out but need to ask another question. I doubt the dealer messed it up. It never went there. They gave an estimate on the phone. When the rear bearings were changed, I took one axle to an independent shop I use. I don't think they used a press. Bet they used a slide hammer. They gave the axle back and the brake dust shield was floppy. Clearly not pressed on. I had to tighten loosen tighten bolts several times to get axle back on. Obviously not pressed. The other axle went to a machine shop and was pressed on. Now, the one not done properly the abs speed sensor is covered in clear wheel bearing grease each time I pull the sensor. The other side pressed properly the sensor is bone dry when pulled. Question-- WILL THE LEAKING GREASE CAUSE A FAILURE TO READ WHEEL SPEED?????
Ok. I removed both rear abs speed sensors and cleaned with electronics cleaner. They mount through a hole in the wheel bearing collar itself. The driver rear sensor was covered in white grease. It seems the new bearing is leaking on the sensor. After reinstall I cleared the code that would clear and drove it. The speedometer was no longer jumping and abs light was off. Abs engaged several times. Abs light did not come on again, but skid control light still flashing and u0126 code won't clear. I think I have 2 separate issues on the same system. I fixed one. The wheel bearing might have to be redone.
I'm leaning towards a failed abs pump. The speedometer needle is jumping again and abs light is back on. Perhaps a solenoid in abs pump has failed. The antilock brakes felt very strange when applied on last drive. Very rough. Not like used to.
Took it to the dealer. I'm positive it's the abs pump control module. The antilock brake and skid control uses a brake pump with 4 lines to the brakes. There is an electronic control board on the side of the pump. When it goes bad or solder joints come loose the speedometer jumps, then will quit. Will turn off abs system. My outside temp reading has disappeared on the dash. It's a bad control board. They can be rebuilt but I can't find a rebuilt one for the Tundra. One engineer on YouTube re soldered his and it worked great again. https://youtu.be/pPife7OD9LY
The other code it threw was a u0073 code which is control module communication bus off. That code will clear. I did the wheel bearings myself. I checked the speed sensor harness on the rear differential and no wire damage. The jumping speedometer points more to a speed sensor going bad. I ordered a salvage tundra clock spring with steering angle sensor for $80 from Salvage yard. I can remove air bag and replace existing one to see if I get communications again. If I lose $80 it's OK. The parts new from dealer are over $500 for clock spring and steering angle sensor. I had a shop use Toyota Tech Stream software and do a zero point calibration but it did not solve it. They said the calibration took, but that the issue was a communication issue and wanted 3 hours labor to diagnose it.
Well if immediately after picking up the vehicle or did all that obviously they screwed something up. They could have broken the speed sensor or shorter the wire that messed up everything. Like ABS system realize all the wiring is connected in a car and a short and one system can affect another if it all happened as soon as you picked it up there's no way that it broke by itself
