schwartzyd

Hey everyone,

So my '01 LS430 has recently brought up a check engine light and a check VSC notification. Upon checking the codes, I discovered Code P1354 (VVT System Fault) and P1351 (VVT CMP Sensor Range / Performance).

After doing a little bit of research, it seems this can sometimes be attributed to a faulty Oil Control Valve? I will note that the car is running absolutely fine, no rough idling or anything of that nature.

Seems pretty straight forward to fix, however, I'm just wondering how do I know which bank is faulty? It seems on other threads people have an indication of whether it is Bank 1 or Bank 2 that has the problem.

Thanks in advance for any advice!

Tom57

Replace both Oil Control Valves (that's exactly what I did on my '01 a couple years ago). See my posts in this thread > https://www.clublexus.com/forums/ls-...lfunction.html

Be careful with the wire harness connection at the OCVs - very brittle.

P1354 is the passenger side OCV. 1 bolt hold down for each OCV.

https://www.clublexus.com/forums/ls-...at-stop-2.html

schwartzyd

Thanks for the response!

Do you happen to know what P1351 is? P1354 is the passenger side OCV, and then P1349 is the drivers side, correct? It's a good idea to just do them both even if I'm not getting P1349?

Tom57

P1351 is a companion code to the P1354 code. Both are associated with the oil control valve which controls the VVTi (variable valve timing of the 3UZ-FE engine).

I recommend replacing both OCVs because when one is faulty and is replaced, then one OCV is new and one is old. The old OCV won't be as efficient as the new one, and ultimately (typically sooner rather than later), it will throw the other OCV code and you will have to replace it. It's just a lot easier (less hassle) to replace both. Analogy: if you had a bad spark plug and all of them were old anyway, you'd replace all of the plugs. You didn't state your mileage, but given that it's an '01, I'd bet the mileage equates to worn out OCVs.

Edit: When one OCV is faulty, the other isn't far behind. This is not something where I wait to get the MIL code for the other reciprocal engine component part. Each OCV controls the valve timing for one bank of cylinders (4 cylinders). You will feel and notice the engine running smoother if you replace both OCVs.

schwartzyd

Yes, mileage is pretty high. 185k miles.

I'll go ahead and replace them both! Thanks a lot for the help, I appreciate it.