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Code P0340, vehicle hunting and high idling

Tiny
EMMANUEL SAGOMBA
  • MEMBER
  • 2002 DAIHATSU DUET
  • 0.9L
  • 3 CYL
  • 2WD
  • MANUAL
  • 60,000 MILES
My vehicle a Toyota Duet 2002 model.
It's hunting seems like it's revving itself even when idling, this also causes it to vibrate a lot at times.
Idling is very high too.
It used to be very quiet.
I've had it taken for diagnostics and it displays the P0340 camshaft angle sensor error (currently looking for the sensor).

Is it the sensor causing this issue or it is coming from elsewhere?

Please help.
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Thursday, June 10th, 2021 AT 1:02 PM

3 Replies

Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
It is unlikely that this code is causing the hunting and high idle but it is possible.

Here is a guide that will help with this issue and is where we should start. I would think a vacuum leak would be more likely.

https://www.2carpros.com/articles/engine-idles-too-high

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Below is the testing that we need to run through for the code if the above info checks out okay.

Please let us know if you have other questions and we can go from there.

Thanks
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Friday, June 11th, 2021 AT 4:10 PM
Tiny
EMMANUEL SAGOMBA
  • MEMBER
  • 2 POSTS
Good day.
Thank you for your speedy response.
I'm yet to start working on the car but one tip that you gave me already showed where the issue is, it's a vacuum leak somewhere on the throttle body.

Did a quick experiment by partially closing the throttle air inlet, closed it about 90% up and voila hunting gone and idling normal.

So I now need to find where the leak is exactly.
I will keep you posted.
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Saturday, June 12th, 2021 AT 10:29 AM
Tiny
KASEKENNY
  • MECHANIC
  • 18,907 POSTS
Great information. Thanks for updating us. Yes. Please let us know what you find as that info will surely help others. Thanks
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Sunday, June 13th, 2021 AT 8:13 PM

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