2005 GMC Sierra Hybrid fault codes

[polishpickles]

Hi guys,

Bit of a background:

- bought my truck beginning of October this year
- 1 week later check engine light comes on
- thought maybe it was a gas cap because after I filled it up, the next day the light disappeared
- light was gone for 2 weeks and last weekend it came back on again
- took the truck in to get the brakes done
- truck was scanned with 2 different scanners, they came up with these codes: P1a32 and P1a43
- tech did not get a description on his scanner for those 2 codes
- I tried searching online but had no luck finding them
- since the scan today, check engine light is gone

Can another shop re-scan the fault codes even though the check engine light is not on anymore?
Anyone has any rough idea what these could be related to and if they're important (I wouldn't care much if it had to do with emissions, or O2 sensors, etc).

Also, my air bag light is on and says "service air bag". The tech didn't have enough time to scan the truck today for that problem and figure out if it's a sensor thing and how much it would cost to fix that. Any ideas?

Thank you.

 

[98trck]

I googled the codes here is what I found
it don't sound safe to drive your truck

[PDF]VCU DTC's - Diagnostics
www.azdtec.com/service/bhev/General/00E/pdf/100-08e-d2-d.pdf

Feb 24, 2011 - P1A32- Hybrid Control Module Command Engine Pedal Correlation. P1A33 AUX ... P1A43- Electric Power Steering Inverter Critical Fault.

 

[polishpickles]

Very interesting. I couldn't find anything when I tried searching for these codes.
I haven't had any issues with the power steering and I have no idea what the first one means. Hybrid Control Module. Someone on another forum said the codes had to do with the hybrid batteries? They were replaced with brand new ones apparently, before I bought the truck.

Any thoughts?

 

[polishpickles]

Also service hybrid battery never comes on, the truck starts every time no problem.

Are those codes maybe for different vehicle? I found these:
https://www.repairprocedures.com/se...or-p1a32/2642_1058_16619_35708_6_1579899.html

Talks about hybrid battery 3 voltage.

 

[Parts007]

i found this. nothing for P1a43

P1A32 is for the hybrid battery 3 voltage.

Battery voltage sensors allow the energy storage control module to monitor the voltage of the batteries in the energy storage box. The batteries apply voltage to internal input resistors that are connected to the signal circuits of the battery voltage sensors. The module provides ground to the battery voltage sensors through the reference circuit. The ESCM monitors the voltage drop across the battery voltage sensors and uses the inputs for hybrid calculations. When the battery voltage is high, the resistances of the sensors are high and the voltage signals are high. When the battery voltage is low, the resistances of the sensors are low and the voltage signals are low. The out of range rationality diagnostics (P1A24, P1A2B, P1A32) determine if each sensor is within a certain amount of the average of the sensors. These faults are only run when during discharge, and when the 42V bus correlation is valid and stable.