FI and Map Sensor Fault
 

I am getting a P0106 MAP/Barometric Pressure Circuit Range/Performance Problem.

I am thinking that the MAP sensor is bad or the stock MAP sensor cannot read the boost coming in correctly.

I have not seen anyone else with this problem.

MAP/Barometric sensor is not used to see positive Pressure, simple fix through the tuning software , Your tuner should be able to handle that no problem .

Sam

Thanks Sam!

Is this something that Uprev disables?

Yes, via the DTC controls.

Oh ok. Thanks :)

That was fast.. Sam and Seb FTW

Looks like there is a TSB for 2010-2012 370Z for this code.

Now question is how do those with Uprev get any TSB done?

Dont diable it, Just change the range of the senor, My tuner did that, Just raised the limitis on the senor. I had the CEL just once.

Interesting. Didn't know that is a possibility.

It is not possible . There is no such table the only way to solve this issue is by disabling the code in the DTC tables

Sam

so when this code is disabled,does that mean the map sensor will no longer function ? i have my reasons for asking this question so please advise.

Well uhh I'd hope u have a reason for asking questions, otherwise what would be the point of asking them??

The sensor will still function, it will just no longer set that specific fault. Say the range considered normal is 1-3PSI(made up numbers). If that's the range the ECU is supposed to see to consider everything working properly and the numbers are outside of that prescribed range the computer will set said fault. If that fault is turned off the sensor still reads, it just no longer throws a fault if it's outside of that prescribed range.

thank you ! repp'd

What about replacing with a map sensor that actually reads boost instead of disabling CEL?

Stock GTR Map Sensor reads up to 24 PSI.

2009 2012 Nissan R35 GT R Stock Map Sensor GTR Manifold Absolute Pressure PSI | eBay

The issue isn't that the sensor can't read it, if you go into actual values the MAP sensor can read the boost just fine. I know this for a fact because I have personally done it on my car since I don't run a boost gauge on my SC setup.

The issue is that the car is NA from the factory, the computer is programmed to think any positive pressure is the sensor reading something incorrectly, hence the fault.

How do you change the values on the map sensor then? I'm interested

What you are saying about changing values has been denounced by GTM.

There is conflicting info floating around.

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Is your tuner an uprev pro tuner?

What values did they change and how?

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Huh? Where have I stated you could change any values in the ECU? Directly in THIS thread GTM came on here and stated that you CAN'T change the values for the MAP, which I then restated in a different way

Again, I have only agreed with GTM in this thread. I haven't said anything conflicting in the slightest.

If you're running 10 PSI of boost the MAP sensor is going to read 10 PSI of boost with or without the fault code disabled and is going to report that to the ECU.

Your post made it seem like you were able to change the values.

I also meant in general there is conflicting info.

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I apologize if I was unclear, was simply trying to state that this is a function of the ECU and not an error that can be fixed by replacing the MAP sensor with an aftermarket unit.

Well I bought one (GTR map Sensor) and I am going to test the theory.

I have the accompanying p006a code that is also driving me insane.

I dont like having to disable the code.

Do you have access to an OBD2 scan tool that can see actual values? Go into the ECU and read off what the factory MAP sensor is reading at WOT at sat 3500RPM, do the same once you get the GTR MAP sensor in and report back here. I'm pretty positive they will say the exact same thing but it would be nice to see proof one way or the other.

sounds like a plan.

Watching this with interest.... just had a CEL in my car and I am not even running a CAI setup:

http://www.the370z.com/engine-drivet...ml#post2147871

what was the outcome?

is the R35 part number identical to the MAP sensor used in the 370z? if so, then the readings will be identical. If they are different, then i'd say the readings would be different due to sensor scaling.

from memory, the MAP sensor used in the R35 and Z34 are identical. You will also find that the MAP-T sensor used in the MR16 turbo engine has identical MAP scaling. That's the key component in the Gotboost plug and play speed density kit for R35. When i was considering options for relocating the IAT sensor (hence my interest in the MAP-T sensor, to get air temp readings as close to the cylinders as possible), it was the prime candidate. Cost is what canned that idea. Second reason was the potential for heatsoak, which is what i was trying to reduce.

Hmm... I guess none of this stuff applies to a 2009 370z because I have not disabled any MAP DTCs, nor are there any MAP DTCs available in my UpRev, nor have I ever had a MAP related DTC pop up in 3 years of being turbo.

I wonder what inspired them to add this DTC later.

all 370z has a MAP sensor and another pressure sensor near your master cyl for the brake booster to ensure it has constant sufficient vacuum.

there has to be a DTC for each sensor. try disconnecting the sensor in the upper right quarter of the intake collector and then scan the car

I know of the MAP sensor being there as well as the brake booster pressure sensor.

I am just saying that my 2009 does not have a DTC P0106 or any other DTC that occurs as a result of going into boost.

I just unplugged the MAP sensor and started the car. With engine idle and reving I do not get a DTC. I will leave it unplugged when I drive it later and see what happens.

I assume the MAP sensor is used for either the VVEL system, or for some trivial thing like EVAP or emissions related.

Digging more, I found in the service manual that my 2009 has a DTC P010A that is "Manifold absolute pressure sensor circuit" and the conditions are:

• An excessively low voltage from
the sensor is sent to ECM.
• An excessively high voltage from
the sensor is sent to ECM.

So there it is! In my UpRev, this DTC is labeled as "Mass or Airflow Volume B Circuit" which is how I overlooked it when cruising through the UpRev DTCs.

But still, I have never had this code pop up on me after all this time!

I am trying to clear things up here. The MAP sensor for the 370Z ( VQVHR engine ) is NOT the same as the one for the R35 GTR. The only purpose for it being around for the 370Z is for the evaporative emission control system ( Canister purging ). Nothing to do with performance. However : If this MAP sensor is malfunctioning , it will cause driveability problem because of the purging of the canister when it should not be purged.

Well, the code P006a ( Manifold absolute pressure
- mass air flow correlation) will show up for sure for 2010-2012 370Z if you run forced induction system. For 2013+ 370Z, you might get code P010A...... For the 2009 370Z, luckily, the ECM does not have this function so the code P006a does not exist, therefore, you will not have a CEL in this case.

Only one way to mask this annoying CEL is to use uprev and turn off the code. Even if you replace the GTR pressure sensor, there is no guarantee that the code will go away because the ECM voltage level is only programmed up to 1 atm at wide open throttle. Any boost > 1 atm will make the ECM assuming that there is something wrong even if the MAP sensor can read positive boost pressure.

Did you have a chance to fit the GTR MAP sensor in yet ? Did the code P006a go away ? I hope it did because if that's the case, I am thinking about buying one. Called Uprev and they have no plan of fixing this issue except to turn off the DTC.

Thanks

How do you actually go about disabling the p0106 DTC code in uprev. All I was able to do was clear it and it would come back in a few weeks or a month.

Any more info on this? Gets annoying having to dig the laptop out, hook it up, clear the P0106 code only to have it pop back up in a few days.

It is really simple , just have your tuner disable that code , The Map/Baro senser is not use to see positive intake pressure so it freaks it out .

Majd

actually there is two map sensors on our cars ,if memory serves me right one is in the brake booster area and and the other one is on the back of the upper intake manifold . and there is a reason why Nissan did that . Nissan claims that under certain conditions of (rpm,load,Maf voltage and speed the intake vales lift and duration what control the rpm ,basically the throttle butter fly are stationary and and the rpm of the engine is controlled via the valve left and duration of the intake valves .


Majed

Yeah..... My tuner is kind of out of business. Guess that's what I get for having GTM tune the car.

Try asking a tuner from here AWD8 and Seymore might be able to help you as long as the tune is not locked :/