Hi:

I have a check engine light on out of the blue.
I have been running with a dead aux battery for a while, but that only cause the yellow no Start-stop indicator to light up.
Using the IID tool I can only pull two codes:
From BCM-Body control module
U0241-00 (2E) Lost communication with the headlamp control module A

From GWM-Gateway module
B13C5-92 (2F) Secondary Battery - Component failure - performance or incorrect operation

The second has always been there, but could the first be the cause of a CEL? I thought that only had to do with engine related issues, or major controllers.

thoughts?

Thanks!

 

That’s weird. I had a gateway module code for aux battery set a code on the PCM but with NO check engine light on.

You are sure there is nothing stored in the PCM?

 

Good point on the PCM, abran.
The IID tool was originally misbehaving and did not even pull the codes for PCM Petrol engine!

After some fiddling with it, I got it to pull the codes from all onboard computers - or at least that is what it seems like it.
I was able to pull an additional code, this time from the PCM: U0447-00 (2F) Invalid data received from gateway A
There is nothing else, other than the engine light. Could it be an issue with the iid tool?

The rest of errors from IID seem to be just "
- Test Not Completed
- Test Not Completed This Monitoring Cycle
"

which I think mean nothing, right?

 

I ended up changing out the secondary battery, setting monitors and getting it smogged.

i’m not sure if I just cleared it would it have come back, but didn’t feel like risking it.

it is the first time I’ve seen that gateway code set in the PCM