OBD II Test Shows a Malfunction in the MAFs (Massive Air Flow) S

P0403 - OBD-II Trouble Code - RepairPal

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Definition of error code P0403 - Exhaust Gas Recirculation Circuit Malfunction. ... TheEGR OBD-II monitor deploys a set of test criteria that are usually run ... Problem, a Plugged or Restricted System, or a Defective Feedback Device ... Nissan ' Volkswagen ' Chrysler ' Lexus ' Mercury ' Cadillac ' Hyundai ' Buick ' Volvo ' AudiMissing: tucson ‎sayes

OBD-II Trouble Code: P0403 Exhaust Gas Recirculation ...

www.obd-codes.com/p0403

Causes. The causes for a P0403 EGR code could be any of the following: ... If the solenoid does operate, you'll have to check current draw on the ground circuit.Missing: huyandai ‎tucson ‎device ‎sayes

Egr P0403 Fault Code Help - Hyundai Forums : Hyundai Forum

www.hyundai-forums.com/...xg.../102478-egr-p0403-fault-code-help.ht...

is this a DIY question, do say.?
still 102? you didnt say. post all DTCs
live, stored and pending.
use a real scan tool , in usa?)

Mass Air Flow (MAF) sensor or circuit

Read more at: http://www.obd-codes.com/p0102


this is the AIr meter (measure air mass not volume)
it reads low, but can be caused by.
1: air leaks (aka vacuum leaks) in the whole induction system.
from air meter , to the intake valves. the whole path !!!
2: too low idle speed, 800 is par. if lower fix that now.

the test is simple. using a voltmeter to see if the air meter is really bad. boy scout simple.
ask for the tests.
or login to
allldata.com
and read 102 then when there, go to MAF page and read that page
it shows the simple tests. (the saturn FSM does too)

im not sure the defunct Saturn co. uses PCM. if it does, its hopeless.(DIY)
most MAFS are analog and any cheap meter works, any.
PCM is modulated, (a ford trick. to avoid.)

I check my MAFs. from keyon,, then start
then racing in idle to 3000 RPM
and if a A/T , i do a A/T tranny stall RPM test. (see tranny tests)
as the same time, this act puts huge load on the engine.
(a free dyno) for 5 seconds max, (overheats tranny the trannysections say that, and is true. read it.
then see output of MAF hit near 4v. this is a good maf.
can elaborate and show pages doing all this and more.
just ask, if all that is too hard,
find an ASE mech, he knows how to do this.

keep in mind no ECu on earth knows what is wrong,
it only can report bad tests. NEVER WHY!
Only the mech finds the truth. by adding more tests.

First step is to have the code or codes read.If the "check engine light" is on there will be a reason and should be a code or codes to be read.Once you have the codes,you can determine the correction needed to get that "check engine light" out and a valid emissions test completed.Get back to us with the codes found.

HI,
Strongly suggest taking to the dealer as it should still be under warranty.

Code info I googled:

OBD II Fault Code P1F68 :Description of OBD II Fault code P1F68

TH2TNK Sensor Value Offset Shifting
Possible failuer of OBD II Fault code P1F68

• Hydrogen Tank Internal Temperature Sensor (TH2TNK) offset shifting
• Inlet Air Temperature Sensor (TA) offset shifting
• Offset shifting of both Teperature Sensor (TH2TNK) and Inlet Air Temperature Sensor (TA) in Hydrogen Tank
• RTC function error (Miscalculated Soak Time)
• FSVSCM failure
• FCCM failure

Diagnostic Procedure using AutoHex auto Scan tool tester

• The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
• If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

Test Conditions using AutoHex Scan tool tester

• Vehicle speed / wheel speed is normal
• Brake is out of action
• The automatic brake is out of action

Clear Fault codes Conditions

• The rear average wheel speed > 15km/h and vehicle speed on the meter<1km/h
• If the rear average wheel speed > 15km/h and VSP<1km/h lasts for 0.3 seconds, the malfunction is determined.

MIL Status

• Glow ON

Note:

• AutoHex is a professional OBD /OBD II diagnostic scanner / scan tool tester.
• This fault code is a GERENRIC fault code, some cars may change the meaning of this fault code.
  To get the accurate fault code description you may use AutoHex OBD scanner

Diagnostic Test Code (DTC) P0101 has a generic description of "Mass or volume air flow circuit range/performance problem". This can be caused by several things including:
> Dirty air filter
> Air leak in air intake system
> Contaminated, deterriorated or damaged Mass Air Flow Sensor
> Poor electrical connections at the Engine Control Module, the Mass Air Flow (MAF) sensor or the Throttle Position Sensor (TPS)
> Faulty MAF or TPS

You should check your air filter and air intake system visually and correct any obvious defects/leaks first.

If a visual inspection does not turn up the cause, then you will need a scan tool capable of reading sensor data to verify the function of the MAF and TPS. You will also need proper electrical diagnostic equipment to verify the integrity of the circuits and continue with diagnosis.

ok need to test the wiring --connections --and sender if verified bad replace

Some check engine lights need to be reset by the OBD-II code reader. It's also possible that you've solved 98% of your problem but there's still 1 problem left (possible clogged fuel injector?) that's pulling a different error code. (possibly P0301-P0312 misfire or P0262-P0295 injector)

Best bet is to go to 1 of the auto parts chain stores that provide free diagnostic tests. If it's just a lingering old error code it will be reset or if it's something new, you'll know exactly what the issue is.

go to auto zone and they should read the code for free and point you in the the direction to fix your problems what ever code is first fix that first then do the next thing

Why aren't they just using the OBD II port instead of the dynomometer? Which state are you in? In Washington, where I work as an emission test specialist, we don't even use the dyne (rollers) to do the test. The OBD II port doesn't require the car to be taken out of park.
If you have to resort to it, just pull the TCS fuse for the test. The TCS won't activate and you won't get any emissions error codes.
Be sure to check with the testing facility before you do this. They may not allow it if it may be considered a safety issue.
I wish you the best!

P0100 OBD-II Trouble Code

Technical Description

Mass Air Flow (MAF) Circuit Malfunction

Basically this means that there's a problem with the Mass Air Flow (MAF) sensor or circuit.

You will likely not notice any serious driving problems, but there may be symptoms like a general decrease in power or sluggishness.
Causes

A code P0100 may mean one or more of the following:

* The MAF may be disconnected, or a wiring connection may be bad.
* The MAF sensor may be faulty.

Possible Solutions

Use an OBD II Reader (or go tou your local parts store and they will for free) and reset the code and see if it comes back.
Then start with the cheapest, easiest repair procedures:

* Check the Mass Air Flow Sensor wiring/harness is connected properly and that there are no broken / frayed wires.
* Unplug and reconnect the MAF wiring harness a few times to clear the contacts.
* Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information).
* Replace the MAF sensor.

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