pcm codes
12-05-2010, 07:06 PM
#1
pcm codes hello to all. i was wondering, how many of my fellow gearheads are currently experiencing troubles codes once the lsx conversion was complete. i swapped a 5.3/4l60e into an '87 chevy c10. the pcm was reprogrammed by the vendor who sold me the harness. since the vendor couldnt program the pcm to stop sending trouble codes, i enlisted the services of a tuner. the vehicle is runs a lot better since the tune, but im still getting trouble codes. i just want to know if this normal or should i purchase a harness from another vendor?
12-07-2010, 07:33 AM
#3
Agreed, code #'s are imperative... it could be something simple and irritating you could run a long time but live without like the MIL (aka check engine light) or something far more important like knock sensors and O2's.
Some codes will trigger other codes to the code numbers AND the order are important. Typically an experienced person can make an educated guess on the order if they have all the info surrounding the code creation.
Since you purchased a harness instead of building your own makes errors in wiring less likely but it is still a possibility as it was probably built by a human. This isn't saying there can't be an error in the harness caused by the builder, but many problems can happen during the install or use beginning with an accidental cut or by laying across the exhaust. A buddy cut his harness on the belt during initial start up and found during testing (he moved the harness and PCM for the drive) the bare spot was grounding against the car body when he hit bumps - talk about a pain to troubleshoot!
Some codes will trigger other codes to the code numbers AND the order are important. Typically an experienced person can make an educated guess on the order if they have all the info surrounding the code creation.
Since you purchased a harness instead of building your own makes errors in wiring less likely but it is still a possibility as it was probably built by a human. This isn't saying there can't be an error in the harness caused by the builder, but many problems can happen during the install or use beginning with an accidental cut or by laying across the exhaust. A buddy cut his harness on the belt during initial start up and found during testing (he moved the harness and PCM for the drive) the bare spot was grounding against the car body when he hit bumps - talk about a pain to troubleshoot!
12-09-2010, 11:45 AM
#5
Not sure if you took the time to look up what the codes are for so here goes. P0101 is a MAF calibration issue likely caused by a custom air intake setup, P0135 is bank 1 sensor 1 O2 heater, P0155 is B2S1 heater and those two you need to have working. I highly doubt you have rear O2's so the P0141 and P0161 codes need to be tuned out. The P0443 is purge solenoid, P0449 is vent solenoid, P0452 is tank pressure all of these I doubt you have hooked up either so they need to be tuned out. If you have power to the front oxygen sensor heater circuits then none of this is a harness issue. Mostly a tuning issue and could be the wrong O2's or burnt out heater circuits in the O2's. Then you need to have the MAF sensor calibrated by your tuner.
