Hello fellas. I have volvo VNL 670, 2011 with cummins isx 500. Have this tcs light for a while. Since that showed up before i start my truck used to puffing air like doing some check and now its gone, that puffing is gone. If it’s the air pressure switch where is actually located i cannot find it. Please for help! Thank you guys!
Is your truck still running ok? I read that TCS faults causes engine to derate , reduces your power and self applies brakes at lower speed. I got it the TCS fault this week , after replacing steer axle leaf springs, somehow the spring shop boys messed my steering wheel position and had to take it to Volvo adjust and recalibrate the angle sensor with Bendix program. I read the TCS system uses data from abs , steering weel , crankshaft , esp sensors. I don't ignore ABS,TCS faults, few years ago my drive axle spindle , hub, bearing got damaged on potholes, this faults were the only warning i got in the middle of the night, stopped in time, noticed oil leak, welded new spindle before lossing the wheels or worst. Btw, i noticed many times during DOT/MTO inspections , they turn the key on and look for fault lights on the dash, some guys apply black tape on the bottom of dash to hide the lights.
My truck is running fine for now, but this tcs light is giving me a headache. Last time 2 years ago i got this tcs light on, after 30 minutes driving or so my passenger drive axle got on fire because of a broken wheel seal. parked on shoulder and firefighters came in because somebody call 911. After they left i was gonna go to closes truck repair, while doing u-turn, the whole drive axle fell off. $5000 less in my pocket. I hope this time it will be sensor or something, since i cannot see any leak or something around the wheels.
Ohh, man scary story . i would take it immediately in good shop and have it checked, could be the steer axle, steering column, even more dangerous. Don't play Russian roulette , maybe next time you run out of luck and hurt yourself or other people around you. The abs fault are most of the time caused by wire corrosion, salt dirty and sensors, valves but ... in the same time is the only sensor that can warm you about hub, axle problem ( and axle oil temp, not as efficient) , can sense bearing movement give bad readings if oil gets out of hub. The DOT puts you out of service for abs . Any other engine and emission faults wont indicate a threat to drivers life; you can still pull on the shoulder with dead motor but not without wheels.
I've been following this thread and now it's my turn. Last night TCS light came on and I have code MID 136 SID 103 FMI 2. Any info and tips on what to check
Yaw sensor out of calibration. Need to check with ACom software what is wrong exactly or recalibrate. Is your truck leaning on one side? Here is the link you can download PDF how to diagnose and repair https://www.google.com/url?sa=t&rct...s/134869.pdf&usg=AOvVaw0veW-eEasjYqyZXP4IUs6v
Thx Snailexpress, Interesting . I remember reading that tcs codes can reduces engine torque, same here on page 9, i'm wondering if a malfunction in yaw sensor could keep it the motor in low torque mode/derate without throwing codes?! I have to check calibrate it also, perhaps causes my low power symptoms .
