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2016 CTS 3.6L
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Discussion Starter · #1 ·
Thanks to suggestions, I bought the OBDLink MX+ to check my engine code, and it ended up being P1070, manufacturer defined. The diagnostic lookup site gave me nothing specific to GM/Cadillac. Searched the code here, and found it pop up in a thread about a class-action lawsuit on the tranny. It seems like some consensus is that a flush may fix the problem. (Thread linked below). Wondering if anyone has had this and can help me understand if that is what is going on here, or do I need to suck it up and bring it in to the dealer?


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'93 SedanDeville 60 Special
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You're being misled, look again at where you went to see P1070,
see how it says it is for Audi and VWs not for GM

Look at the freeze-frame (you only show part of it)
read what it is telling you

The DTC tripped when coolant temp was not reporting hot enough, so PCM is showing engine in open loop
Determine if the coolant temp is not reporting higher temps when engine is fully headed up, should b like 190 plus degrees, if not the sensor could be bad and reason PCM not going into proper closed loop

Show s for the LTFTs, almost -16% too rich on bank 1 and almost -9% too rich on bank 2 (B2)

For one shows an imbalance B1/B2 and way out of bounds for fuel trims
Perfect would be around zero (+/- 5%) so that tells you for whatever reason the PCM is being told by a feedback sensor that there is seen a lot of airflow, so it is commanding more fuel

Being you did not post the complete contents of that freeze-frame, hard to tell what other information was reported

Totally get coolant temp up, clear that DTC and then see if that code trips again and if so must post the full freeze-frame and with the OBDWIZ software that comes with OBDLINK MX+
report what the LTFTs, O2 sensors, coolant temps report

Being that rich and imbalanced left/right would cause misfires and engine stutter that also that would be felt in how tranny functions

Thanks to suggestions, I bought the OBDLink MX+ to check my engine code, and it ended up being P1070, manufacturer defined. The diagnostic lookup site gave me nothing specific to GM/Cadillac. Searched the code here, and found it pop up in a thread about a class-action lawsuit on the tranny. It seems like some consensus is that a flush may fix the problem. (Thread linked below). Wondering if anyone has had this and can help me understand if that is what is going on here, or do I need to suck it up and bring it in to the dealer?


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· Registered
2016 CTS 3.6L
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49 Posts
Discussion Starter · #4 ·
Yeah, I tried to select GM/Caddy on that page and it gave me the same thing. I'm not really a car guy, I didn't get most of what you said :|

Sounds like this is the action I need to take:

Totally get coolant temp up, clear that DTC and then see if that code trips again and if so must post the full freeze-frame and with the OBDWIZ software that comes with OBDLINK MX+
report what the LTFTs, O2 sensors, coolant temps report
How do I get the coolant temp up? Do I just drive around, come back and use the dongle/app to clear the code? (I don't see how to do that in the quick start guide, which is all that came with it.)
 

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'93 SedanDeville 60 Special
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Just normal driving or idle with hood shut
You also can use the OBDLink and watch what the coolant temp is along with fuel trims and O2 sensors

With engine running
Go o Diagnostics, click on trouble codes, if any there write down what they are
to clear DTCs click on clear trouble codes

Heat up coolant, drive and then go back to trouble codes check if DTC(s) return and if so click on
Freeze-frame for the snapshot which shows exactly what engine was doing when DTCs tripped

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2009 CTS 3.6L DI Premium, 2014 CTS VSport
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If I'm not mistaken they want you to pay for the version of OBDWIZ for Windows that reads the GM-specific codes, although it isn't clear that you'll need that capability today.
 

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2016 CTS 3.6L
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49 Posts
Discussion Starter · #8 ·
I was finally able to get back to this today, but I just cannot seem to clear the codes. I figured out I need to press the start button without putting my foot on the brake to enter acc mode, which I did. But tapping clear codes doesn't work. It goes through the motions, but nothing happens. The device is connected and communicating. Not sure if this is a product issue or a car issue. This was the screen:

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I did grab all the freeze frame screens at least from the code. Not sure if this helps. Not sure what to try next other than bringing it in?

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