Engine misfiring and running rough, several codes all at once

SAINTSCARCASS

MEMBER
2012 CHEVROLET TRAVERSE
3.6L
V6
2WD
AUTOMATIC
171,000 MILES

Basically I'm getting a bunch of codes and it all started at once. Thought maybe a ground wire or something shorted: p053, p0054, p0059, p0060, p0131, p0141, p0151 and p016. Then a p0420 but if my o2 aren't getting power then of course that pops up. Also getting a p0700 from the transmission. The car has been misfiring and idling rougher and rougher. Replaced all 4 o2, checked resistance and the power to them, all seems fine. Then just now looking those up I've got 3 more! P3037, P3430 and P3434. Tried looking the 3037 before this didn't find it. I'm about to replace ECM unless someone has an idea. I can't find anything about these kinds of issues online. Please help

1 Reply

JACOBANDNICKOLAS

MECHANIC
109,885 POSTS

Hi,

Wow, that's a tough one. All the sensors don't go bad at once. The P0420 indicates the converter is not operating at the minimum threshold. The last codes, P3434, and others are not related to this vehicle.

Did you scan the entire CAN-bus? CAN stands for controller area network. Basically, it will identify codes regardless of the module that has stored them.

Here is a quick video showing it being done:

https://youtu.be/InIlnsjOVFA

Now the codes you ended with, P3037, P3434, P3430 are tied into the timing. However, they are not identified for this vehicle. But, the P0016 is.

Here is what I suspect has happened. I have a feeling either the timing has jumped or something is causing one of the cam actuators to fail. (specifically an intake cam)

If you have a live data scan tool, I need you to check two things. First, with the engine cold and not started, check the signal from the coolant temp sensor to confirm it is close to ambient temperature.

Next, start the engine and let me know what the short-term fuel trims are.

If the timing is off, the trims will be all over the place and it could cause the crazy codes for the O2 sensors, converter, and poor running. The P0700 could all tie into this as well. Although it is a transmission code, it ties into the emissions (which we know are off). The code, P0700, is an informational DTC that indicates that an emission-related transmission DTC has been set in the transmission control module (TCM). So this could all tie in with the issues.

Let me know if you scanned the CAN and also, if possible let me know the trims and ECT info. At this point, I don't think it's the ECM. It could be, but all these items connect. The P0016 (my theory) is the one we need to focus on.

Take care,

Joe