Need help with these code

Reply Subscribe

Thread Tools

Search this Thread

Dec 19, 2023 | 05:56 PM

Tonyhurr

Thread Starter

1st Gear

Joined: Dec 2023

Posts: 1

Likes: 0

From: California

Need help with these code

Hello I need help with this code on my 1998 Lexus GS400 :
P0340
P1345
P1350

Dec 20, 2023 | 06:13 AM

JonGS3

Intermediate

Joined: Jul 2017

Posts: 428

Likes: 193

From: NC

Change your VVTi oil control valves. There's one at the top of each cylinder head at the front of the engine. One or both may be bad. Replacing them will potentially cure the first code as well since that can trigger when the oil valves go bad. I just had to replace them on my wife's Highlander as it was throwing similiar codes.

https://www.clublexus.com/forums/gs-...sor-p0340.html

https://www.clublexus.com/forums/gs-...400-p1345.html

https://www.clublexus.com/forums/gs-...ode-p1350.html

Dec 20, 2023 | 08:11 PM

dwoods801

Racer

Joined: May 2017

Posts: 1,525

Likes: 354

From: Utah

My gs400 had those codes come up and the car started running terrible, I did an oil change and added a special solvent designed to break down sludge and carbon and build up. I got from a parts store. Had to add to the oil and the car idle for a little while, and then changed the oil and then reset the codes, and 10 years later I have never had another issue with them. I was really happy with that solution, and avoided replacing those sensors.

Dec 21, 2023 | 06:44 AM

TrueGS300

Pole Position

Joined: Nov 2018

Posts: 2,077

Likes: 576

From: CA

Agree w/ dwoods, first thing with variable valve timing issues is to check oil level/condition. It is run by the oil system. An engine oil flush can break up blockages and restore operation. Definitely worth a try before replacing parts.