P0135
P0135 HO2S Heater Performance Bank 1 Sensor 1....can someone tell me what that mean in English?....Does it mean that its time for new o2 sensors, cus i have they are stock with about 48K miles on em.
FormerVendor
Joined: May 2006
Posts: 187
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Based on your username, I am assuming you have an 02 f-body. You will find a lengthy description of this error here. Bank 1 = Driver's side, and Sensor = before the catalytic converter. The sensor is critical to closed loop fueling. The sensor might be bad. You really need a scanner to review the output data. Have you made any changes lately and what are your mods? Replacements are reasonably priced ($50 range depending on brand and source). HTH
Yea i have an 02 Z28. The only mod that i have that would be realative to this code is my exhaust. i have Edelbrock shorty headers, custom 2 and 1/4" y-pipe, stock cats, and 3" to a Magnaflow muffler. The code has been poping up ever since i got my exhaust done, but recently it is coming on more and more, almost as soon as i clear the code.
The heater code means the sensor does not switch
often enough, soon enough, to make the PCM happy.
It may or may not have any effect on performance
/ street drivability. Problems would most likely show
as higher than usual + fuel trims at idle / low cruise
and a rich mixture as a result, if the O2s are actually
sleepy. Headers bring this code on, a lot. Even shorty
headers shed more heat than stock log manifolds with
their heat-shields and small surface area.
If you can see your LTFTs at idle and they are not
crazy high then the O2s are still "good enough" most
likely. Just bitching about the weather.
often enough, soon enough, to make the PCM happy.
It may or may not have any effect on performance
/ street drivability. Problems would most likely show
as higher than usual + fuel trims at idle / low cruise
and a rich mixture as a result, if the O2s are actually
sleepy. Headers bring this code on, a lot. Even shorty
headers shed more heat than stock log manifolds with
their heat-shields and small surface area.
If you can see your LTFTs at idle and they are not
crazy high then the O2s are still "good enough" most
likely. Just bitching about the weather.
Well i dont think it has anything to do with the weather cus the weather was the same stock as when the problem happend. its beeng going over ever since summer. Just now its getting to be anoying, so i think i am going to replace them and see if that helps.
Originally Posted by jimmyblue
The heater code means the sensor does not switch
often enough, soon enough, to make the PCM happy.
It may or may not have any effect on performance
/ street drivability. Problems would most likely show
as higher than usual + fuel trims at idle / low cruise
and a rich mixture as a result, if the O2s are actually
sleepy. Headers bring this code on, a lot. Even shorty
headers shed more heat than stock log manifolds with
their heat-shields and small surface area.
If you can see your LTFTs at idle and they are not
crazy high then the O2s are still "good enough" most
likely. Just bitching about the weather.
often enough, soon enough, to make the PCM happy.
It may or may not have any effect on performance
/ street drivability. Problems would most likely show
as higher than usual + fuel trims at idle / low cruise
and a rich mixture as a result, if the O2s are actually
sleepy. Headers bring this code on, a lot. Even shorty
headers shed more heat than stock log manifolds with
their heat-shields and small surface area.
If you can see your LTFTs at idle and they are not
crazy high then the O2s are still "good enough" most
likely. Just bitching about the weather.
Trending Topics
LTFT are the Long Term Fuel Trims. you have these for bank 1(driver side) and Bank 2 (passenger side). what these do is based on your daily driving (non WOT) adjust your fueling to be at a 14.6:1 AFR... they can be high or low based on your VE table and/or your MAF curve. If you have a tuning program just change 1 the VE or the MAF at a time...as if you change both you will never get done leveling them out....
