Ever since i did my 98 to 02 pcm conversion i get the following codes.

[z28ls1818]

its making me nuts.

p0121 p0102 p0135 p0141 p0155 p0161


any ideas?

the tps code i have an idea it can be the throttle position sensor. it should read at .4 when foot is off the gas on idle. but it reads 0% am u correct in assuming it should be at .4?


please any info would be greatfull. i need these codes off of my pcm its driving me nuts with the ses light on.

[z28ls1818]

i want to update that i checked my fuse engine sensor in the engine bay and it was shot. i swapped it and ill let you guys know tomorrow if it cured my problems.

[z28ls1818]

im still getting the codes. i cleared them but im now getting the codes again after a drive and i turned off and on.


any help?

anyone in southern cali that can hlep me. i would be glad to pay $

[z28ls1818]

someone take a look at my tune.


mods below.

gm asa cam 226 236 110 lsa
85mm gm maf
long tubes catted y
a4 stalled 3600 underdrive pulley
fast intake
ported heads


can you see if anything in my tune relates to the codes being thrown

[ChipsByAl]

What RPM is the engine idling at? Check table C3907. You may need to adjust the TPS sensor if the throttle body is not stock. It should go from 0% to 100% as you go from idle to WOT. The MAF code will set if it is disconnected. The other codes are all O2 heater codes, check the power to the sensors.
Al

[z28ls1818]

in gear it should idle at 870 warm at operating temp. in park it should be at 860.

[joecar]

If the fuse was blown, did you find the cause of it... and is it blown again...?

[joecar]

Send me a pm with your exact location and phone number.

[joecar]

More info: http://www.ls2.com/forums/showthread.php?s=&threadid=178439

[joecar]

The O2 heater performance DTC's may be due to a poor ground connection.

The other two may be due to poor wiring.

The TP one may also be due to the sanity check table that Al referred to.

[z28ls1818]

ill check the fuse.

[z28ls1818]

the fuse had blown again. this time i looked for damaged wiring. i looked under the car and found the o2 extensions melted on the driver side header. i replaced the burnt up wires. hopefully this will cure my issue.

[joecar]

Sorry my phone battery went flat while we were ending our conversation... :doh2:

While you're repairing the O2 extension wiring, check the correct O2 heater polarity in the extension harness.