Code p06dd 2014 Silverado

[mayutt]

Bump...

 

My 2014 Sierra 5.3L is popping P06DA and PO6DD consistently. Started one morning a couple weeks ago all of a sudden. Oil pressure runs about 20 psi higher than it used to. From reading in these forums, youtube, etc, seems like the likely culprit is the oil pressure solenoid. My truck has over 221K miles, so the labor to replace the solenoid seems to make it logical to replace the engine when it's time to do something. 

 

However, in the meantime, is there really any problem with the oil pressure running a little high? I think I'm going to just keep driving it as is until something worse develops. Power is normal, runs as well as it ever has. 

 

I've replaced the oil pressure sensor and that made no difference... I'm also going to replace the bank 1 upstream O2 sensor... one guy fixed his by doing that... apparently that O2 sensor is on the same circuit as the oil pressure solenoid. Fixed his.

 

Thoughts? 

[newdude]

6 minutes ago, mayutt said:

Bump...

 

My 2014 Sierra 5.3L is popping P06DA and PO6DD consistently. Started one morning a couple weeks ago all of a sudden. Oil pressure runs about 20 psi higher than it used to. From reading in these forums, youtube, etc, seems like the likely culprit is the oil pressure solenoid. My truck has over 221K miles, so the labor to replace the solenoid seems to make it logical to replace the engine when it's time to do something. 

 

However, in the meantime, is there really any problem with the oil pressure running a little high? I think I'm going to just keep driving it as is until something worse develops. Power is normal, runs as well as it ever has. 

 

I've replaced the oil pressure sensor and that made no difference... I'm also going to replace the bank 1 upstream O2 sensor... one guy fixed his by doing that... apparently that O2 sensor is on the same circuit as the oil pressure solenoid. Fixed his.

 

Thoughts? 

 

 

If the harness going to the solenoid is working ok, its time for an oil pump.  

 

As for O2 sensor, I suppose only because both upstream O2 sensors are powered off the same fuse as the oil pump solenoid. 

 

If you are gonna shotgun an O2 sensor, buy OEM only.  Don't buy an OE equivalent or one that says same part as OE either.  GM are VERY sensitive to oxygen sensors.    

[mayutt]

Will do, thx. I'll update after the O2 sensor shotgun. My expectations are low...

[mayutt]

Soooo, I drove the truck about 500 miles this week, no time to change the sensor. About 450 miles into the drive oil pressure went back to normal... and no more P06DA/DD codes. Looks like the solenoid is working again. 

 

Seems obvious now, but I put oil conditioner in the oil the last couple oil changes (seemed like a good idea for a >200K mile engine). I changed the oil with straight 0W-20 synthetic when the P06DD/DA started...

 

Now I'm thinking the oil conditioner gummed up the solenoid and it took 450 miles to wash the conditioner out of the solenoid with fresh oil.

 

Anyway, I'll not be using any additives from now on. Super happy it looks like I have more miles left in this engine.