FI and Map Sensor Fault

phunk

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.

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phunk

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!

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conmam

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.

conmam

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

Tombonombona

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.

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Tom B.
Exotic Speed R2 Titan Catback-GTM Stage 2 Supercharger 522 whp on a mustang dyno
2004 Subaru STi *SOLD* *WRITTEN OFF*

Tombonombona

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.

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Tom B.
Exotic Speed R2 Titan Catback-GTM Stage 2 Supercharger 522 whp on a mustang dyno
2004 Subaru STi *SOLD* *WRITTEN OFF*

gammamotors

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

gammamotors

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

Tombonombona

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

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Tom B.
Exotic Speed R2 Titan Catback-GTM Stage 2 Supercharger 522 whp on a mustang dyno
2004 Subaru STi *SOLD* *WRITTEN OFF*

ANMVQ

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

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14 Q50 AWD, ARK, ECUTEK (SEB), Takda,

DIGItonium

While trying to diagnose my idle surge issue I disconnected the MAP sensor. Engine started to idle close to 1200 RPM. It stayed there even after plugging the cable. After restarting the engine idle dropped to normal, but still hunting a bit. When it's hunting like this it's a pain to do the idle relearn as it struggles and nearly chokes from 500-1000 RPM.

I'm still hunting for leaks. Some days it idles nicely, and other days it surges after startup. Most of the time after warming up it starts to surge more and freaks out after heavy boost (hang at 1k RPM).

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