Code P0340, no check engine light

2004 MAZDA 6
241,500 MILES • 3.0L • V6 • 2WD • MANUAL
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MAZDA6MAN1
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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.
Sep 13, 2019 at 11:02 PM
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ASEMASTER6371
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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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Sep 14, 2019 at 12:22 AM
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MAZDA6MAN1
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So would the issue be in the sensor harness connector or PCM?
Sep 15, 2019 at 1:50 AM
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ASEMASTER6371
  • ✓Experienced Mechanic
  • 52,796 POSTS
Could be, but I need you to check the voltage.

Roy
Sep 15, 2019 at 5:13 AM
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