Battery flat - faults come and go!

Evening all! Prior to my battery loosing charge I had an intermittent fault with the temp gauge not working (which I was hoping to be the temp sensor). My battery failed due to lack of use and I recharged and then invested in a CETEK conditioner which is great, but now.. PSM/ABS light has been coming on since battery failure - code read it and comes up as N/S/F speed sensor line.. Temp gauge has been working fine ever since using the CETEK! Can anyone shed a bit of light regarding battery/symptoms of failure or are these items more likely to be coincidental? Appreciate any feedback as always :thumbs:

First of all .. have you cleared the codes and actually driven it to prove there is a permanent fault since the battery went flat ? If you havent then do that first .. If you have then it would seem there is either no signal or a poor signal from the wheel speed sensor n/s/f . The sensor is the usual fault but it could also be a break in the wiring. I just find it curious it has happened after a flat battery . Hmm .. no mice in your garage is there ? seen a few incidents of mouse damage recently .. even one car that lives outside .

Hi Demort. Yes I cleared the fault code and it has come back. I haven't had a chance yet but was planning to swap the sensors sides over to see if the same fault re-occurs at the O/S. Is there anyway that an intermittent temp gauge could be caused by a poor battery health? - seems odd to me that this previous issue has now 'cured' itself since I have been permanently maintaining the battery!

Temp gauge ... Well i guess its possible .. ive seen some strange things over the years .. off hand i would have said no but it is voltage dependant . Just keep an eye on it for now i would have to say . ABS .. You might find removing one sensor is a mission let alone two ! Have a go on the bad side first though . They sieze in , and drilling is a nightmare .. metal core in the sensor that snaps drill bits . At work then i would scope the sensor to prove it , thats not a normal bit of kit for the home user so perhaps do it another way .. If something is £100 or less then to me thats an hours labour give or take .. if its going to take me an hour to prove if something is faulty ( or longer ) then i just replace it . If its not that then the customer gets a new sensor .. if i spend the time to diagnose then the customer pays the same but doesnt get a new sensor . Basically .. find out the cost of a new sensor .. its either the sensor or a break in the wiring harnes .. if its intermitant then it will be a tough job proving the wiring is faulty without haveing replaced the sensor . If its a permanent fault then its a case of disconecting sensor and abs cu plug and an ohms check . Just to make it interesting .. i would say 50 / 50 on sensor / wiring harness .. if it was the rear then i would say 90% sensor as the front harness is known to fail . Hopefully you understand my inept answer

.. Yes understood! Thanks for narrowing the odds :thumb: I guess change the n/s/f sensor and hopefully job sorted if not then I've gained new sensor and eliminated to wiring thereafter. Good advice. The Temp gauge yes agreed it's strange and maybe a coincidence or something else as would (previously) always not work, red warning light etc and then would either jump up to about 70 or turn ignition off, restart engine and would display correctly on the gauge. Now after having battery go flat, recharged then CETEK plugged in to maintain - no such problem at all. Temp gauge seems permanently fine! :dont know: