Y is it still doing this?

[clg82]

Well i had a service engine soon light for an P0155 (oxygen sensor heater circuit malfunction pre-converter sensor right bank) So i replaced both the passanger and driver side front bank oxygen sensors.....i took it to get the code checked and it is still saying P0155 , plus the exhaust gas recirculation, insufficient flow detected (but that's because of the ls6 intake) do i need to reset my pcm or something for it to clear the o2 sensor code???

[flipsutter]

After putting in those parts I would always reset the PCM to clear the code. At least thats what I have always done.

[sunsetorangess]

Reset the code, with either a scan tool, diablo etc or by disconnecting the neg bat terminal for a bit. After driving it through a full cycle you shall see if its fixed.
J

[2001NBMZ28]

How long ago did you replace them? The 02 heater diagnostic only runs on a cold start, once per ignition cycle - needs 3 consecutive tests (and pass) to turn the MIL off. I'd just reset the PCM and see what happens.

[clg82]

How long ago did you replace them? The 02 heater diagnostic only runs on a cold start, once per ignition cycle - needs 3 consecutive tests (and pass) to turn the MIL off. I'd just reset the PCM and see what happens.

how do i reset the pcm?

[clg82]

How long ago did you replace them? The 02 heater diagnostic only runs on a cold start, once per ignition cycle - needs 3 consecutive tests (and pass) to turn the MIL off. I'd just reset the PCM and see what happens.

i replaced them last night, and have only driven the car 2 since they were installed.

[clg82]

what exactly do you mean by full cycle?

[clg82]

After putting in those parts I would always reset the PCM to clear the code. At least thats what I have always done.

how do i reset the pcm?

[LS1buckey]

how do i reset the pcm?

You can reset the pcm by disconnecting the negative battery trem or with the scan too. A "cycle" is when the engine goes from cold to normal running temp then back to cold.

[2001NBMZ28]

You can also reset it this way:

Turn key on, don't start car
Pull PCM BATT and PCM IGN fuses in engine compartment
Wait about 5 min
Turn ignition off
Replace fuses

Also resets the readiness tests and will take a few minutes to relearn the idle.

[clg82]

You can reset the pcm by disconnecting the negative battery trem or with the scan too. A "cycle" is when the engine goes from cold to normal running temp then back to cold.

so i this normal for the car to not know the new o2 sensor is in there until the pcm is reset or i drive it 3 cycle?

[Spaz]

Well i had a service engine soon light for an P0155 (oxygen sensor heater circuit malfunction pre-converter sensor right bank) So i replaced both the passanger and driver side front bank oxygen sensors.....i took it to get the code checked and it is still saying P0155 , plus the exhaust gas recirculation, insufficient flow detected (but that's because of the ls6 intake) do i need to reset my pcm or something for it to clear the o2 sensor code???

do oyu have the rears turned off???

if you do is it possible that you plugged a rear 02 sesor in to the front?

[clg82]

do oyu have the rears turned off???

if you do is it possible that you plugged a rear 02 sesor in to the front?

no the rears aren't turned off..the catilatic converters are stock, and i replaced the front ones.

[0rion]

did the light go out and come back on or did it stay on? I'm with the other guys....just need to clear the code and put some drive time on it. You could also drive it and it'll clear itself after it runs and doesn't fail a pre-set amount of times.

[clg82]

did the light go out and come back on or did it stay on? I'm with the other guys....just need to clear the code and put some drive time on it. You could also drive it and it'll clear itself after it runs and doesn't fail a pre-set amount of times.

I reset the pcm yesterday afternoon, and when i drove it last night for about an hour it stayed off and then came back on again, i think because of the EGR code i had before, so if it went off then it should have reset itself correct?

[0rion]

I would imagine it did but I would take it and have it scanned to be sure. If your egr is missing it'll definitely come on for that but I'd read those codes to make sure that's all you have.

[clg82]

I would imagine it did but I would take it and have it scanned to be sure. If your egr is missing it'll definitely come on for that but I'd read those codes to make sure that's all you have.

I'm going to have the codes read again in about a half an hour, i will give you an update when i return.................

[clg82]

IT FINALLY CLEARED!!! Thanks to everyone that put there .02 in this thread........~Chris

[2001NBMZ28]

Good deal. Have the EGR codes turned off permanently so you won't be starring at a constant SES, and not knowing if/when something else is going on.