Celica Forums General Discussion General CEl Code p1693 not cleared. Help!!!!

Hey guys new to this site.

Recently bought a 2002 Celica Gts for $2800 with 146,000 miles. The owner already told me it had with a cel code p1693. I did some research before i bought the car thinking it would be an easy fix with the common issues being worn Lift Bolts and a dirty VVTL Ocv filter.

Today i recently changed the Lift Bolts with new ones part#90105-06293 luckily the old ones weren't striped but they were getting to the point of searing off. I also took out the VVTL filter near the battery side and it wasn't clogged or dirty but i decided to put a new filter in any ways with part#15678-32010.

i didnt check filter on the alternator side as it was getting dark and i dont really want to mess with removing it if i dont have too. Ive also read that the issue on that side shouldn't cause the P1693 code to pop up

i then cleared the Cel code with my obd2 scanner and let my car warm up and then drove around, i tried to engage lift and immediately the check engine light popped up with same code P1693

At this point after changing the Ocv Filter and changing the lift bolts im at a loss.

idk whats wrong with my car or how to solve it, can anyone please help or give suggestion? Thank You in Advance

also thinking back on it when i was changing the filter. The filter was placed inside like this with the bottom opening not going in all the way so thats how i put the new one back in.

Does the orientation matter?

which way should it be placed inside?

I *believe* orientation does matter, as it will only "snap" into place a certain way, if I remember correctly. When you had the valve cover off, did you see a lot of sludge or oil build up? What RPM were you forced to stop at?

When I took the valve cover off there was no sludge or buildup at all everything looked fine all along. When driving I believe I couldn't pass 7k rpm and that's when the code p1693 would pop up

Have you tried changing the oil? Do you know what kind of oil has been used in it? An oil with too thick viscosity could be the cause too. If not that, I would look to the electric VVL solenoid that covers that filter.

I'll change the oil see if that helps not quite sure what oil the previous owner used.
I'll get back to you to see if it worked

Have you figured it out? I’m having the exact same problem and have done the exact same things you have done.

For me my VVTl screen was clean so that was not the issue the problem was the oil pressure switch gone bad so it limited my rpm to 6000 rpm and it threw the cel code p1693 So I suggest buy a oil pressure switch but don’t cheap out buy a good brand like denso

Yep. Off brands electronic parts dont last long. DENSO ignition coils would be good after 250K miles , while the Chinese off brands including Bosch-China would die after about 10-15K. have a Delphi coil in it, still working after 15K.

You can buy all DENSO parts direct from DENSO.COM/PARTS, about 1/3 dealers' prices and about 1/2 part stores.