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Aug 16, 2025 | 01:22 PM

jkz1r

Thread Starter

4th Gear

Joined: Aug 2025

Posts: 4

Likes: 0

Please Help

Please help me,

2021 rx350L,
After 4 weeks of vacation, I start my car and
Display shows secondary collision brake system malfunction, AWD system malfunction 2wd mode engaged, parking support brake malfunction, and I checked the code and I got P0328.
Is there anything else I need to check besides the knock sensor mentioned in the code?

Thank you

Aug 16, 2025 | 02:03 PM

GreyfoxMT

Driver

Joined: Aug 2025

Posts: 56

Likes: 29

Quote:

Originally Posted by jkz1r

Please help me,

2021 rx350L,
After 4 weeks of vacation, I start my car and

Did you have it on a battery maintainer? Today's vehicles are notorious for draining batteries down over a couple weeks time. I would put it on a charger, bring it all the way up and then clear the codes. Then see what you have.

Aug 16, 2025 | 02:07 PM

15RX98422

Intermediate

Joined: Sep 2018

Posts: 259

Likes: 84

From: WA

I left my 2022 Lexus RX350 for a little over a month. It started right up. OP. I would bite the bullet and have it towed in. It may be as simple as Lexus cleating the code, but you will have peace of mind.

Aug 16, 2025 | 02:37 PM

jkz1r

Thread Starter

4th Gear

Joined: Aug 2025

Posts: 4

Likes: 0

Quote:

Originally Posted by 15RX98422

Thank you very much. I will try that.

Aug 16, 2025 | 02:55 PM

Oro

Pole Position

Joined: Dec 2013

Posts: 3,466

Likes: 920

From: wa

Quote:

Originally Posted by jkz1r

Charge the battery. What is the resting voltage?

Aug 16, 2025 | 04:13 PM

GreyfoxMT

Driver

Joined: Aug 2025

Posts: 56

Likes: 29

Quote:

Originally Posted by 15RX98422

and how old was you battery when you did that vs OP who has a 4+ year old battery? Besides that, OP also has ways to check codes and such from them reporting a P0328.

Aug 18, 2025 | 07:48 AM

jkz1r

Thread Starter

4th Gear

Joined: Aug 2025

Posts: 4

Likes: 0

I changed battery but same. Now what should I do?
Please help.

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Aug 18, 2025 | 05:33 PM

supratreo

Pit Crew

Joined: Sep 2009

Posts: 158

Likes: 45

From: ca

^^ this.
next step would be to clear the codes and see if they come back. if they do then obviously check it.
is there any possibility of rodent damaged wire?

Aug 19, 2025 | 02:09 AM

#10

jcg0324

Instructor

Joined: Feb 2021

Posts: 835

Likes: 408

From: PA

Quote:

Originally Posted by supratreo

^^ this.
next step would be to clear the codes and see if they come back. if they do then obviously check it.
is there any possibility of rodent damaged wire?

Yes! A car sitting idle for 4 weeks becomes a routine target for mice. They can get in the engine compartment, build a nest and start chewing on wires. Take it in and have it checked out.