2016 Denali 6.2L Clearing Permanent DTC's

[svl208]

Can Permanent DTC's be cleared with HP Tuners?

Did Repairs on a OCV Solenoid P06DD. I replaced the engine oil pump and wiring inside the timing cover.

Code still shows as permanent. Does the vehicle need to be driven (Drive cycle) for the PCM to clear it on its own? The vehicle still acts like its in limp mode.

Thanks for any information.

[GHuggins]

It's got to see the problem fixed, if it actually is, to clear permanent codes.

[svl208]

That's exactly what I thought.

No clearing or drive cycles.

PCM has to see that it's fixed when it runs its checks.

Thanks for giving ur information.

[svl208]

Another question.

On put together the engine coolant temperature sensor was left unplugged. And the truck threw P0118 DTC. That sensor unplugged caused the fans to kick on immediately. When we plugged the sensor in the fans stopped running. But that P0118 DTC keeps coming back and is permanent.

Thanks.

[TriPinTaZ]

same answer

You cannot clear permanent codes. The ECU has to see the issue is corrected. Sometimes it takes a 1-3 drive cycles to clear.

If the code ALSO has a "Current" tag on it, then the issue persists and will not clear because the ECU's tests show the issue is currently existing. This goes for all ECU codes.

[edcmat-l1]

To expand on the above posts, depending on the type of code, sometimes they take several drive cycles to clear. The quickest to pass and clear are "open circuit" type codes. These are quickly checked and passed by the comprehensive component monitor. Performance type codes take longer to clear.

Your unplugged ETC code should clear quickly. The P06DD will take longer. It has a more complicated set of criteria for pass/fail/clear.

[svl208]

Still fighting this truck.

"Permanent" DTC's will clear on a drive cycle.

"SES, Pending, Current, Old, Permanent, History" will be the current DTC that needs to be corrected?

All the DTC's say "permanent"

P06DA says "SES, Pending, Current, Old, Permanent, History"

Should I try and diagnose the P06DA due to it being "SES, Pending, Current, Old, Permanent, History"

Thanks

[Joshinator99]

Still fighting this truck.

"Permanent" DTC's will clear on a drive cycle.

"SES, Pending, Current, Old, Permanent, History" will be the current DTC that needs to be corrected?

All the DTC's say "permanent"

P06DA says "SES, Pending, Current, Old, Permanent, History"

Should I try and diagnose the P06DA due to it being "SES, Pending, Current, Old, Permanent, History"

Thanks

Yes, you need to resolve the P06DA since the truck still sees it as a pending and current fault.

[svl208]

That's what I think too.

Thanks for your input.

[svl208]

What does "repair control circuit for a short to voltage" mean?

Is there a wire thats broke and getting voltage from another wire?
Is it a wire thats not getting enough voltage?

P06DA diag. says "Repair the oil pump solenoid control circuit for a short to voltage"

The Oil pump command signal is #59. Is that the circuit that would be damaged?

Thanks

[TriPinTaZ]

Any code that says "Current" means it is currently happening. "Permanent" can be current or history, but that tag means you cannot clear the DTC, the ECU has to see the issue corrected and clear itself.

[svl208]

I'm not a mechanic.

But my testing leads to the OCV Solenoid having a short to voltage.

What's does that mean?

Thanks.

[crankz1]

I would inspect the front harness and connectors on the timing cover as well as where it connects to the main harness.
Maybe some coolant or something got into the connectors during the repair, or some pins got bent/damaged.
Other than that, the new pump could have a defective solenoid (unlikely but possible) or the new internal harness got pinched or damaged somehow during the install.

[chadtunes]

I'm having this exact same problem. P06DA and P06DD. I was fighting with that connector for a good long time too so it's got to be electrical. I got the engine in last week. I turned off the PID's before they became permanent, I had a good scare there for a little bit until I realized what was going on. The oil pump is variable output, the solenoid is normally open and closes to bleed off pressure. If it fails you'll have high oil pressure and you'll get those two codes. That's all I know.

I haven't figured out the mysterious drive cycle that will clear perm codes..

It seems easy enough to just get back in there and pin everything out but I'm getting the GDS2 and a subscription.. I need schematics and more information.

[svl208]

I been directing the front harness today. I read someone that the vacuum pump pulley could damage the wiring. It's a GM oil pump so I'd be bummed if it came with a bad OCV Solenoid but I'd help my nephew and replace it. I know the lil harness behind the cover is good cuz we bought a new one. I'm almost a 114% sure I'd didn't pinch the wiring. I'm not a 114% sure I plugged it in. Drinking and working on vehicles. I'm usually damn sure tho.

Is there a way to test the OCV Solenoid without a scan tool? Can it be commanded with HP Tuners?

chadtunes I night be able to get u wiring diagrams so u don't have to pay. If u need something like that message me.

[svl208]

*Not directing

Disecting/checking the wires.

[chadtunes]

I been directing the front harness today. I read someone that the vacuum pump pulley could damage the wiring. It's a GM oil pump so I'd be bummed if it came with a bad OCV Solenoid but I'd help my nephew and replace it. I know the lil harness behind the cover is good cuz we bought a new one. I'm almost a 114% sure I'd didn't pinch the wiring. I'm not a 114% sure I plugged it in. Drinking and working on vehicles. I'm usually damn sure tho.

Is there a way to test the OCV Solenoid without a scan tool? Can it be commanded with HP Tuners?

chadtunes I night be able to get u wiring diagrams so u don't have to pay. If u need something like that message me.

Hahah.. Now I'm wondering if I did the same thing but I vividly remember plugging it back in. I fought with that connector for a good long time after mis-routing the harness. I didn't reinstall my Vacuum pump. I plugged it's holes and used it's nipple, drilled a hole in the intake manifold, heated up a tap for threads and then screwed it into the intake manifold.

I'll PM you for the schematics..

[svl208]

I'll eat crow when I make a mistake.

All testing lead to a bad OCV Solenoid. I thought well maybe it is a bad OCV in a new pump or there's still the possibility I didn't plug it in?

When I pulled back the timing cover I didn't have to unplug anything behind the timing cover. LmFaO! �� �� �� ��

I plugged it in. Put everything back together and all DTC's are now permanent.

So from what I understand it needs a drive cycle? It still goes into some type of reduced power mode in the driveway before I can drive it?

Any ideas?

Thanks

[GHuggins]

You can try to do a write entire and just flash the cal back into it as long as you're 100% the new part is good. You can even set the dtc to no error before hand and then drive it to see if the problem is gone and then set the code back to report. If it was definitely unplugged and now plugged in I would think as long as things were good that it would clear with and engine fire up at that point.

[svl208]

It's plugged in for sure.

My son gave me a great of idea of take a picture. I got a picture and this time I now it's plugged in.

Unfortunately I can't remove a code or change anything in the tune. It's my nephews truck and I don't own the license on the PCM. The truck has a had a AFM and DOD delete done and a small cam installed by someone else.

Wierd as sh#& that it keeps going into reduced power. DTC's are all permanent. I got a P0106 MAP code. Tested it out to a bad MAP sensor. I went bought a new one, installed it and it Idled the longest it had in a while. Then the lil vehicle with squiggly lines behind it accompanied by a flashing check engine light and the turd when back to reduced power.

P0118
P0300
P06DA
P06DD
U0100

All listed as permanent.

Dang truck is killing me. Lol. I'd rather work on my on vehicles for free. Lol.

Thanks for the info.