P0141 Code Fix

[hagar]

Hello to everyone, I joined this forum for some info about the p code 0141 o2 sensor heater circut malfunction.could not find a proper fix,the original probe had the heater loop open circut.so a universal probe was purchased on eBay for £17.50. When fitted the same code re-appeared and the Engine Management Light came back on. On further investigation I discovered that the replacement sensor had a heater resistance of 4.5 ohms and the original 14.5 ohms by testing another working probe on the car . On further investigation I discovered that if the probe draws less than 20 mA or more tham 2000mA it brings the management light on and code P0141. This is very miss-leading as you think that there is still a problem. The aftermarket probe draws more than 2 amps bringing the light on. This was fixed by adding a 10 ohm resistor in series with the heater circut. Job Done!

Hope this helps someone out there.

[k33rjd]

im afriad this just shows how crap aftermarket stuff is. the tolerances arent as close on aftermarket products as they are on gen items. save time and hassel buy from lexus.

[gsportcars]

Yeah spend a rediculous amount of money on an over priced sensor from the dealer just to avoid the hassle of fitting a 5p resistor. Logic at its best.

[hagar]

why anyone would want to buy a genuine probe,at much much more than a replacement is beyond me, as gs cars said a resistor is a few quid k33rid obviously has too much money or he works for lexus. hagar