Truck was running fine now getting these codes?

[lstruck]

p0102 po134 po155

I'm Not running Maf or my rear o2's..

Do you guys see something wrong in my Tune? cos CLSD tune

[lstruck]

is it possible when i was running it rich for before this tune burned out both 02's and do i just need to set p0102 to not report?

[joecar]

Do you have any log files (with wideband)...?


Do not set P0102 to Not-Reported (if you do then the PCM will still try to use the MAF).

[lstruck]

here is a log but I cleared the codes. at one point it got disconnected so ignore that part.

[lstruck]

and I do have new o2's but the code still came on this morning and it also revved up a lot at start up( to like 2k) but I cleared the codes before i logged and they never came back on.

[joecar]

A0012, A0013: set these to 511 mph.

[joecar]

LO spark table is higher in the high load area than the HO table (set them back to the stock tables respectively).

[joecar]

Set P0102 to 1-Trip in C6001... you want it to trigger immediately (i.e. now, not on the next trip);



you want to see P0102 trigger (otherwise the PCM is not failing the MAF (i.e. it is still using the MAF table)).

[joecar]

Log shows it's close...

at PT the PLX says its a little leaner than stoich while the LTFT's say it's a little richer... (after the PCM applies the trims the wideband should say it's stoich)...

narrowbands are swing a little slow (1-2 times per second vs 3-5 times per second);

what fuel are you running...?

[joecar]

Timing seems to be jumping around indicating either of these: airmass is jumping (VE) or timing table is jumping.

[lstruck]

Log shows it's close...

at PT the PLX says its a little leaner than stoich while the LTFT's say it's a little richer... (after the PCM applies the trims the wideband should say it's stoich)...

narrowbands are swing a little slow (1-2 times per second vs 3-5 times per second);

what fuel are you running...?

93 oct. and Narrowbands are like a day 4 days old when I did that log. Electrical problem maybe?

[lstruck]

Well made all those changes that you said and I still have the same issues p0135 and p0155 and p0102(I know this one has to be set)
?

[joecar]

Something is wrong with the NBO2... we need a troubleshooting chart from the Service Manual, what year/model/vehicle is this...?

[lstruck]

04 two wheel drive auto silverado 5.3.

[joecar]

I'll look it up...


but in the meantime, here is some info (base on F-car):
P0135 (http://www.gearchatter.com/viewtopic9053.php)
P0155 (http://www.gearchatter.com/viewtopic9044.php)

[joecar]

Might be due to long tube headers losing heat ahead of the O2 sensors...

[lstruck]

Why did it just start doing it now. for 6 years on maf and long tubes cam and heads never got a code. Now only change is 2bar map and FAST LSXRT intake. and CLSD tune. Just doesn't add up or exhaust leak maybe?