2000, 454 vortec bb engine seems to be missing after distributor R&R

[Christian Steffen]

Po134 and po154 and po300. The sensors are showing voltage readings when I look at the live data. I cleared the codes. I need to go drive it to confirm the p.o.300 was old code. Keep in mind it has the 411pcm in it. Never through any codes before I tore into the engine and swapped computer.

What year is your truck? What style o2 sensors are they? Triangular or flat plug?

 

[Ttoyota]

2000. Triangular i believe. Bout to take it on the road and see what it does.

 

[Christian Steffen]

2000. Triangular i believe. Bout to take it on the road and see what it does.

I'm pretty sure I had the same issue with my 0411 swap that you're having. O2 voltages stay steady at ~450 mv? Try tying together pins 26, 29, and 63 on connector 1 (blue).

I had the exact same symptoms after my swap, but I figured it was somehow an isolated incident since I haven't really seen anyone else mention it before.

 

[Ttoyota]

Good deal. They fluctuate when on and off the throttle but they still throw a code. I'll try that the too! Did it work for you?

 

[Ttoyota]

Also. Tie them together. So bridge them and leave them in there current pin locations or what..

 

[Christian Steffen]

How much do they fluctuate? Do they trim properly or no?

It worked for me, yes.

 

[Christian Steffen]

Yes, tie all three together but leave them in their current pin locations. 63 is a ground, 26 and 29 should be your low reference for the o2s.

 

[Ttoyota]

Thx dude. I couldn't tell you if they trim properly but i can say that they will go up to 980 mv. Stay steady at around 450. Ill do what your saying though. Thx again!

 

[Christian Steffen]

Thx dude. I couldn't tell you if they trim properly but i can say that they will go up to 980 mv. Stay steady at around 450. Ill do what your saying though. Thx again!

Good luck, hopefully that's it. I don't think mine ever read in the 900mv range. Just give it a shot and see what happens, shouldn't hurt anything.

 

[Ttoyota]

C1 blue 63 isn't used. No wire going to 411

Yes, tie all three together but leave them in their current pin locations. 63 is a ground, 26 and 29 should be your low reference for the o2s.

C1 blue 63 isn't used. No wire going to it on 411