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Code p148e, knock on start?

Tiny
BHAMDOC1973
  • MEMBER
  • 2012 TOYOTA PRIUS V
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 127,000 MILES
Is this code related at all? I know the EGR, and intake issues can cause this but what about this code? P148e
Sunday, October 23rd, 2022 AT 3:09 PM

6 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Hi,

That code is related to the variable camshaft tuning (VCT). Absolutely, that can cause a knocking when first started. In most cases, looking for a sticking or stuck VCT solenoid valve caused by contamination. See pic below for what I'm questioning.

Interestingly, I'm not showing that code for this vehicle. By chance, are you outside of the US? Let me know because that may be why.

Take care,

Joe

See pic below.
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Sunday, October 23rd, 2022 AT 9:54 PM
Tiny
BHAMDOC1973
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I am in the US, I am aware of the knock on Prius, they all do it, mostly due to intake needing update, EGR and cooler. But never seen this code before. But it's there. Where is the VCT on these cars if they have one?
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Monday, October 24th, 2022 AT 4:57 AM
Tiny
BHAMDOC1973
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  • 1,593 POSTS
Oh, sorry I see it.
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Monday, October 24th, 2022 AT 4:58 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Hi,

I checked in a different manual and found the same thing. I have no idea why it isn't listing it.

As far as the code is concerned, again, it doesn't even show that on this vehicle. See pic below and you'll see what I mean. Also, the pics above are accurate for the control valve.

Let me know.

Joe

See pics below. That is from two different professional manuals. I wish I had a better answer for you, but I'm not sure which direction to go.
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Monday, October 24th, 2022 AT 6:44 PM
Tiny
BHAMDOC1973
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Yes, I see it now. They changed it in 2012 to the water pump code.
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Monday, October 24th, 2022 AT 7:01 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,779 POSTS
Hi,

That makes sense. LOL Okay, I attached the diagnostics below for the P148F. Take a look through them and let me know if it helps.

Take care,

Joe

See pics below.
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Monday, October 24th, 2022 AT 7:49 PM

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