Hey everyone just drove home from work and my car would not drive past 5K RPMs and than the vsa and check engine came on with a P2646 code on the navi screen. Never had this happen to any of my TLs so looking for a little guidance so I can tackle this in the morning.

 

DTC P2646 = Rocker arm oil pressure switch circuit low voltage.

The rocker arm oil pressure switch may fail intermittently.

The symptom may be intermittent and you may not be able to duplicate it after clearing the DTC.

Replace the rocker arm oil pressure switch and O-ring.

 

Where would it be located?

 

Make certain oil level is up to snuff and the "valve assembly" is above the oil filter.
There is a valve timing oil pressure switch and a solenoid assembly.
Make certain good wire connection on the pressure switch, then
possibly a bad solenoid.
If the oil is extremely dirty/caked, it can cause a problem also.

 

Figured out the problem the engine was 4 quarts low on oil !!!!! WTF? I drained the oil that was still in there and replaced the oil filter and refilled will mobile 1 synthetic. All good now!!! Thanks for the guidance fellas !!

 

Jeebus....


When was the last time you did an oil change ?!?

Ever heard of that thing called a dipstick?!

 

4 quarts low?
damage will robinson, damage!

if i recall, our car holds 4.something quarts of oil.. you were running it dry!?!? ?

 

So you're telling us you were driving around on less than 1 quart of oil... and the motor didn't seize up?

 

Yeah it's crazy because when I purchased the car 4 months ago the dealer guaranteed me fresh fluids!!! So I don't know how the engine didn't seize just got lucky!!!

 

Good to know I just need the small bottle next time I do a change. Maybe two just to be safe