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P0069 trouble code, 2005 Mit Outlander Cleaned manifold,

Customer Question
P0069 trouble code, 2005 Mit...
P0069 trouble code, 2005 Mit Outlander
Cleaned manifold, replaced gaskets, reset code.
30 miles later Eng Light on
Replaced EGR Valve & Gasket, clear codes
30 miles later Eng Light on, same code
Replaced vacuum houses, reset code,
30 miles later light on, same code
Checked electrical connections, no obvious issues
Replaced MAP sensor, reset codes, 30 miles later, light & same code. Put old MAP sensor on.
Replaced MAF sensor, reset codes, 30 miles later light and same code. What are we missing?
Submitted: 2 years ago.Category: Mitsubishi
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Answered in 13 minutes by:
11/3/2015
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago
Doug
Doug, ASE Certified Technician
Category: Mitsubishi
Satisfied Customers: 6,979
Experience: Mitsubishi employed and Factory trained ASE certified technician
Verified

Hi,

It is important to understand that the P0069 is not related to engine conditions at all. It is specifically comparing the barometer sensor to the differential sensor while the engine is off.

Knowing that, we can rule out EGR, vacuum lines, timing etc... they are all irrelevant. This code only cares about if the MDP and the MAF read the same when the engine is not running.

So with that all said... what are your MDP and MAF readings with the key on engine off?

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Customer reply replied 2 years ago
Ahh..that makes sense. Husband has taken those readings. .will have to do that tonight.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago

No problem, we can pick up this evening then?
I would imagine the readings are going to be fairly indicative, unless this is something that comes and goes though it doesn't sound that way.

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Customer reply replied 2 years ago
Yup We will pick up this evening after he gets home with scan tool.Nope. It doesn't come and go...it's constant.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago

Great. Just post here when you are ready and I will get with you as soon as I see your post.

No need to reply right now unless there is something else to add.

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Customer reply replied 2 years ago
Doesn't appear we have right tools to get those readings here with us. Using a OBD scan tool and android app. Can get manifold intake pressure reading and a vacuum reading. No separated MAF or BARO Pressurecreadimg. In off position intake pressure varies from 10-12 psi. Vacuum fr 5-9 in hg.
Mitsubishi Mechanic: Doug, ASE Certified Technician replied 2 years ago

Thanks.
Without a barometer reading we are a bit at a loss, however the MDP readings look way off anyway. They are normally in the 30inHg range (key on, engine off) and should never read pressure (psi).

If you wiggle the wiring around does the reading change considerably?

Is this the same reading with the other/original sensor as well?

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Doug, ASE Certified Technician
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