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Code P0340, no check engine light

Tiny
MAZDA6MAN1
  • MEMBER
  • 2004 MAZDA 6
  • 3.0L
  • V6
  • 2WD
  • MANUAL
  • 241,500 MILES
I have a p0340 returns every time I clear it, there are no check engine light on. Also tachometer will only read when revved about 2k rpms and a slight hesitation when stepping on the accelerator. I'm thinking this just may be a vacuum leak, but who knows. The code is for Bank 1 but I changed both cam sensors, but code still comes back.
Will begin looking for vacuum leaks and change crank sensor this weekend and see what results I get.
Being that the engine is chain driven, is it possible to have slightly jumped timing.
Still looking for advice.
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Saturday, September 14th, 2019 AT 6:02 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The code indicates a voltage issue with the sensor.

Did you verify the 5 volt signal from the PCM to the sensor?

Roy
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Saturday, September 14th, 2019 AT 7:22 AM
Tiny
MAZDA6MAN1
  • MEMBER
  • 2 POSTS
So would the issue be in the sensor harness connector or PCM?
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Sunday, September 15th, 2019 AT 8:50 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Could be, but I need you to check the voltage.

Roy
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Sunday, September 15th, 2019 AT 12:13 PM

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