im wondering if i have a wiring problem but, before i go wire chasing i figured i would post this up to see if anyone has seen anything similar to this. i have been open loop for a while because my o2s were freaking out, with no success of finding my problem stayed in open loop and left it alone. im wondering if i find the reason for these issues i might fix the o2s.

here is the dtcs list.

[PCM] U1016 - Loss of Class 2 Communication with VCM (History) (Immature)
[Unknown] B1440 - (History) (Immature)
[Unknown] B2961 - (History) (Immature)
[Unknown] U1016 - Loss of Class 2 Communication with VCM (History) (Immature)
[Unknown] U1152 - Loss Of ACM Serial Data Communication (History) (Immature)
[HUD] U1000 - Class 2 Communication Malfunction (History) (Immature)
[HUD] U1016 - Loss of Class 2 Communication with VCM (History) (Immature)
[HVAC] B0263 - (History) (Immature)
[HVAC] B0408 - Temperature Control (Main/Front) Circuit Malfunction (History) (Immature)
[HVAC] B0418 - (History) (Immature)
[HVAC] B1375 - (History) (Immature)


Continuous Tests
Misfire: Complete
Fuel System: Complete
Comprehensive Component: Complete


Once Per Trip Tests
Catalyst: Complete
Heated Catalyst: n/a
Evaporative System: Incomplete
Secondary Air System: n/a
A/C System Refrigerant: n/a
Oxygen Sensor: Incomplete
Oxygen Sensor Heater: Incomplete
EGR System: n/a

 

never seen those codes before what are you doing to that truck?? lol

 

hahaha, i thought the same thing. it runs great but, it popped all these strange codes and i dont know when. the front wheel speed code has been there since i bought the truck brand new and as for the rest......... i have no clue when they came about. i never look at the dtcs unless i have a problem or checking my readiness tests for inspection.

 

i wouldnt worry about them. looks like body codes did your check engine light come on?

 

I have all kinds of similar codes stored in mine also. No worries.

 

Yea, those are body codes, I wouldn't lose any sleep over them...and they have no affect on your O2 sensors

 

the u code probably set when you reflash the pcm, cause during a reflash none of the other modules can communicate with the pcm. i would just clear them cause there all history

 

no, the check engine light never came on.


i didnt know if they were on the same circuit or shared a common ground or even somehow shorting each other slightly. you never know what could happen because i have seen some strange stuff. while troubleshooting i never count anything out. thanks for the replies fellas.