PCM Diagnostics & Tuning - P 0135

I just cleared a code in the Z P0135 (Heater Circuit Bank 1 Sensor 1)???\

Possible exhaust leak or bad 02 sensor.

I get that code frequently. Comes and goes but has no effect on performance. I dont worry about it.

I'll figure it out soon...I haven't noticed any problems yet.

I just cleared a code in the Z P0135 (Heater Circuit Bank 1 Sensor 1)???\

Possible exhaust leak or bad 02 sensor.
Check at AutoZone. They should have a code book for that # and they can give you some possible causes.

o2 sensor

The LT headers cause this to happen. You will either get a P0135 or P0155 for the heater circuit. The O2 Sensors are further downstream and do not heat up as fast. You could either disable the DTC's or try the Bosch 13111 O2 sensors for the Corvette.

i have the bosch 13111 sensors and i just got that code today. do you think the 02 went bad?
i used them since my header install back in may and just got tuned monday, i was runnin pretty rich so am thinking it may be fouled.

I think as long as you're not getting insufficient switching codes, the heater codes are nothing to worry about. I set my p0135 & p0155 codes to not turn on the SES light cuz I got tired of looking at it. It has no effect on performance.

I just got my cam installed so and my car couldn't get tuned all the way cause of a vibration in the car on the dyno.

Also my car has been hestiating 1/4 to 1/2 throttle a couple of times, bad tune or is this the O2 hitting me.

If you log the O2 sensor voltage, see if the the sensors are switching back and forth once the car is in closed loop. If they are switching correctly, then the tuning is probably off.

A heater circuit bank 1 sensor 1 O2 sensor code could be a lot of things, but for years now most auto companies have been putting heaters into the o2 sensors so that they get into closed loop faster. I've run into that code a lot at work, 9 out of 10 times the heater has burned itself open, but you may also have a broken wire, a wire with too much resistance, or a short to ground. Most likely not an exhaust leak. Best of luck with it, I'd check the voltage readings for the heater circuit, hopefully its just an O2 sensor because there is nothing more frustrating than chasing broken wires.

What Is Meant By "bank 1 Or 2". Are The Heater And The Aux Control Sensors On The Exhaust. I'm Getting Codes Po155, Po135 And P1415.

What Is Meant By "bank 1 Or 2".

Bank 1 is driver's side, bank 2 is passenger side.

How Many O2 Sensors Are Their?

Will The Heater Circuit Sensor Be On The Exhaust Also.....

I'll try to answer some of your questions:

How Many O2 Sensors Are Their?
There are 4. Two front's (pre-cat) and two rears (post cat). The fronts control your fueling and the rears tell your computer if your cats are functioning correctly or not.

I'm Getting Codes Po155, Po135 And P1415
The first two codes are heater codes for the front o2's. You don't have any mods listed, but I assume you have longtube headers. Most people get these codes after doing longtubes from the o2 being further away from the motor.
The third code is an AIR system code. Did you remove your AIR system or something? A list of mods you've done would be helpful.

Will The Heater Circuit Sensor Be On The Exhaust Also.....
Not sure what the hell you're asking here, but I'll take a guess. I assume you're thinking there's a seperate sensor in the exhaust for the heater circuit??? The heater circuit is part of the o2 sensor. The o2 sensors have a built-in heater that helps keep them hot enough to read correctly. Is that what you're asking?

I have LT's, and throwing P0135 as well. Take a look at my thread, think my problems are related to this?

http://www.ls1tech.com/forums/showthread.php?t=477946

I have LT's, and throwing P0135 as well. Take a look at my thread, think my problems are related to this?



No. P0135 is a heater circuit code. It has no affect on performance or fueling. If you were getting insufficient switching codes, then you need to change o2's. Like said in the other thread, you have other electrical issues.

I know the LT C5 guys typically move the rear O2s to the front and edit the rears to get rid of the codes. Does this work with F-bodies?

Yes, using the vette rear o2 sensors (bosche #13111) have a higher voltage heater circuit and will help with the heater codes. The wires are also longer, eliminating the need for o2 extensions.