bander555

How do you reset the ECM on a 1998 lexus LS400?


I got this codes
P1349
P1656

I replace the vvt sensor 6 times

Could you please, help to solve this problem

etex

When I had the same messages I disconnected the negative battery cable for about 5 minutes, put it back, and mine was fixed. Hope yours is that simple. Good luck.

NisMax

Bad battery or alternator?

billydpowe

iTrader: (1)

when mine (99) came on with 1349 my oil control valve was dirty, I pulled them out and cleaned them with carb cleaner spray, and also cleaned the chamber they fit in. no more trouble... it has been about a year.

bander555

i do not know

I replace the vvt sensor 6 times
I replace the battery
I disconnected the negative battery cable


it still there

billydpowe

iTrader: (1)

clean your oil control valve.......

95lexsc300

hi when you said clean the chamber, you ment the housing that the valve goes in. How do you clean it? What do you clean it with. My ls is throwing the code for vvti malfunction bank 1 giving me 4 possible reason , but my car runs normal. I supposed all lexus with vvti goes through this.

smokincigs

When mine did this it was the alternator.

billydpowe

iTrader: (1)

I have a set of mechanical fingers that I "grabbed" on to a small piece of cloth, soaked it in carburetor cleaner and run it up and down in the chamber, plus twisting it around and around, I replaced the dirty cloth as necessary. my car also ran normal, I have two of these 99 LS's, but only the one has done this.
I went ahead and cleaned both sides on mine, the pass side takes longer to get to it, but it solved my light problem....

billydpowe

iTrader: (1)

you did not have the 1349 code.... the ECU uses the VSC light for any number of problems, you just have to read the codes....

smokincigs

True. I somehow missed that.

95lexsc300

wierd thing mines was doing exactly what your was doing,but it ran fine. Then I used the cruise control and it's gone referring to the check engine vsc light try that.

bander555

i change it, the light still there

xyzzy_dude

I just had this error occur on my '98 LS400. No engine misses, and no other codes, just multiple 1349s. Like Billy says, it was the oil control valve. My mechanic replaced it at a total cost of about $250 (parts and labor) and now all is well again.

Just wanted to reinforce the importance of the OCV to this code.