Code P0335, "VSC and VSC off" lights at the same time?

BENJAMINTHERERRIBLE

MEMBER
2002 TOYOTA AVALON
3.0L
V6
2WD
AUTOMATIC
213,000 MILES

I bought yet another car, and after a couple hundred miles, I get a check engine light (P0335), "VSC, and VSC off" lights all at the same time.
I would normally assume the knock sensor or its wiring, but since I have the other 2 lights with it, I have to suspect it might be something else?
Where should I start?

5 Replies

JACOBANDNICKOLAS

MECHANIC
109,582 POSTS

Hi,

The code is related to the crankshaft position sensor. I don't feel the vehicle stability control is connected other than the computer is shutting it down.

The code P0335, is specific. It indicates there is no crankshaft position sensor signal. I would start by either testing or replacing the sensor and see if that helps. In most cases, it is a faulty sensor. See pic below.

Let me know your thoughts.

Take care,

Joe

See pic below.

Image (Click to make bigger)

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Sunday, November 13th, 2022 AT 5:33 PM

BENJAMINTHERERRIBLE

MEMBER
46 POSTS

Oh, shoot, I'm sorry, it's not p0335, it's p0325 - knock sensor 1.

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Monday, November 14th, 2022 AT 10:25 PM

JACOBANDNICKOLAS

MECHANIC
109,582 POSTS

Hi,

No problem whatsoever. LOL It happens to all of us.

Yep, the 325 is the knock sensor. To be more specific, there is no signal from it. However, I don't feel that it is tied into the VSC. I guess indirectly, there could be an issue within the ECM that is setting both, but it's unlikely.

A knock sensor is used to finetune the ignition timing. With the code you have, it could be caused by a few things. See pic 1 below.

Is this the only code present? Do you have any misfire codes? Is the ABS light turning on?

Let me know.

Joe

See pic below.

Image (Click to make bigger)

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Tuesday, November 15th, 2022 AT 6:53 PM

BENJAMINTHERERRIBLE

MEMBER
46 POSTS

Intermittently, I also get p0330, for the other knock sensor. No other codes arise and no ABS light, and the ABS is functioning.

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Wednesday, November 16th, 2022 AT 1:46 PM

JACOBANDNICKOLAS

MECHANIC
109,582 POSTS

Hi,

Since the two are controlled by different circuits, I think the best thing to do would be to start making sure connections are clean and tight. There is a chance that we have a weak connection at the PCM and confirm the knock sensors are tight.

Let me know your thoughts and if you are comfortable performing those checks.

Joe