[shadow5403]

Ok, a little while back i was throwing these codes:

P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1.
P0155 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 2.
P0741 Torque Converter Clutch Circuit Perf/Stuck Off

Now i changed all four of my O2 sensors to Bosch Premiums, and i also flushed the tranny and drained the torque converter and put in synthetic ATF.

After this was done, i cleared the engine codes...then disconnected the negative on my battery to reset the comp.....and a few days later the same code came back. Could the wires be bad that connect to the O2 sensors...and could i have a bad solenoid that is getting stuck on my torque converter?

[stephen]

Originally Posted by shadow5403 Ok, a little while back i was throwing these codes: P0135 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 1. P0155 Upstream Heated Oxygen Sensor Heater circuit fault - Bank No. 2. P0741 Torque Converter Clutch Circuit Perf/Stuck Off Now i changed all four of my O2 sensors to Bosch Premiums, and i also flushed the tranny and drained the torque converter and put in synthetic ATF. After this was done, i cleared the engine codes...then disconnected the negative on my battery to reset the comp.....and a few days later the same code came back. Could the wires be bad that connect to the O2 sensors...and could i have a bad solenoid that is getting stuck on my torque converter?

If it says circuit fault it sounds like it thinks the problem is in the wiring, not the oxygen sensor itsself. If you have a wiring diagram and VOM meter you might be able to check it out.

I believe the torque converter has a lock up function that is probably activated by a solenoid, but I'm just guessing.

[stephen]

This is something to check for the o2 senser problem.

both of the 02 sensor heater circuits and the purge and vent valve share fuse #8 in the centeral juntion box ( the box under the dash NOT UNDER THE HOOD) this fuse is a 20a fuse

[shadow5403]

ok, thanks ill have to cheack that out....i know when i put the new Os sensors in, the wires didnt look bad or melted...or anything like that.

And as far as the torque converter ....i know the solenoid is only one of the things that could cause a lock up.....im not gonna play with that one....im taking it to a tranny place to find out what the problem is with that one. From hat ive read....that lock up problem to lead to a dead tranny since it cause so much extra heat.