Mass Air Flow Sensor: Error Codes (P3011 / P0238) ($07E8 / $07E9)

[JFK_Kennedy]

Year: 2012
Model: Peugeot 3008 1.6 THP Executive
Make: Petrol / Automatic

Hi Everyone,

New Here so Hope I'm Posting this in the Correct Thread, Else Please Let Me Know and I will Move it to The Correct One.

First, I'm No Mechanic, Please Excuse if I Sound like a Total Ass or Ask Stupid Questions.

I Recently got Hold of the Above-Mentioned Car That has been Standing for a Few Years, But the Engine Works and The Car Starts and Runs, Only Issue is The Check Engine Light Comes On. After Running Two Different Types of Diagnostics Scanners on it, They Bring Up the Codes (P3011 / P0238) ($07E8 / $07E9) which after a Google Search Points Towards the MAF (Mass Air Flow) Sensor Being Faulty. As This is a Small and Easy Part to Replace, I thought I would Start There, I could Only Get Hold of a Second Hand One for Now, So Could Also Be Faulty?
I Replaced the MAF on The Car, but still The Same Errors Come Up.
Again, after some Google Searches the Following came Up:
1. Unplug and See If the Same Errors Come Up - They Do with Sensor Unplugged.
2. Clean the Sensor, Some Say in Thinners, But for How Long?
3. Test the Connector with a Multi-Meter for the 5 Volts, But Which Pins Do You Test?
4. Some Talk About a Short, In the Connector or Harness at The Exhaust, where do I check This?

Apart from The Above, Is There Any Other Tests I can Do or Things to Check? Is There a Way to Check the Sensor Itself?
Could It Be Something Totally Different?

Any Advice Would Be Greatly Appreciated?

Thank You and Keep Well.

[GiveMeABreak]

Hi. Best to provide the VIN so I can relate the codes to the specific engine ECU (please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff).

[JFK_Kennedy]

Hi. Best to provide the VIN so I can relate the codes to the specific engine ECU (please post your VIN in full without spaces - it will be automatically masked from public view after submitting your post & will only be visible to staff).

Good Day, Can I just Reply with Quote to your Reply or do I have to DM you?

Thanks

[GiveMeABreak]

Ok, so there are 2 types of Engine ECU versions on this vehicle and the codes have different meanings depending on which you have.

Check the label on your engine ECU as shown below, and let me know if you have the 17.4 or 17.4.2 version:

[JFK_Kennedy]

Hi Marc,

Seems The ECU for the 2012 Peugeot 3008 is inside the Fuse box Screwed Down with a Metal Bracket except if I am looking in the Wrong Place?
Is There Any Other way to Get the Version maybe via Diagnostic Tool or Any Other Way?
I'm Just Afraid if I start Playing Around there That I damage Thanks?

[GiveMeABreak]

If you have Diagbox, or another diagnostic tool that can report the version, then of course.

For now I'll just put both versions up so you can determine alter which one is applicable. The '$' codes are invalid codes, so can't help there.

Bosch MED17.4.1 Branch 1

Fault Code:	P3011
Description of Fault:	Throttle position regulation fault : Return spring ineffective. The return spring of the flap (direction of closing) on the motorised throttle housing does not manage to return it to the minimum open position following opening, or the butterfly does not open during the test of the springs. The following conditions have to be met: - Engine management ECU in main triggering phase - Return spring tested at each initialisation if the conditions allow (Engine speed, engine coolant temperature )
Conditions for Fault to clear:	The fault disappears if the butterfly returns to its minimum opening position having been operated during the return spring test
Downgrade Modes whilst Fault is active:	Minimum open position of the motorised throttle housing Cut in the injection when the engine speed goes above the maximum engine speed Deactivating the cruise control For a gearbox with engine speed regulation (automatic gearbox or piloted manual gearbox), limitation of the torque sent to the gearbox Air conditioning cut-off
Symptoms:	Starting difficult Unstable idling Idle speed too high Lack of power Engine hesitation
Suspect Areas:	Motorised throttle unit

Bosch MED 17.4.2 Branch 2

Fault Code:	P3011
Description of Fault:	Motorised throttle unit : Throttle return spring fault. The return spring of the flap (direction of closing) on the motorised throttle housing does not manage to return it to the minimum open position following opening, or the butterfly does not open during the test of the springs. The following conditions have to be met: - Engine management ECU in main triggering phase - Return spring tested at each initialisation if the conditions allow (Engine speed, engine coolant temperature)
Conditions for Fault to clear:	The fault disappears if the throttle returns to its natural opening position after being operated during the return springs test
Downgrade Modes whilst Fault is active:	Natural opening position of the motorised throttle housing Cut in the injection when the engine speed goes above the maximum engine speed Deactivating the cruise control For a gearbox with engine speed regulation (automatic gearbox or piloted manual gearbox), limitation of the torque sent to the gearbox Air conditioning cut-off
Symptoms:	Starting difficult Unstable idling Idle speed too high Lack of power Engine hesitation Stalling on starting Stalling at idle
Suspect Areas:	Motorised throttle unit Electrical harness

Bosch MED17.4.1 Branch 1

Fault Code:	P0238
Description of Fault:	Turbocharging pressure regulation fault: Short circuit to positive or open circuit. Short circuit to positive on the turbo pressure sensor Voltage of the turbo pressure sensor higher than 4,9 V or signal from the inlet air temperature sensor greater than 3,1 V for more than 0,3 s. Conditions of activation of the diagnostics: Engine management ECU in main triggering phase
Conditions for Fault to clear:	The following conditions have to be met: - Voltage of the turbo pressure sensor between 0,15 V and 4,9 V - Voltage of the inlet air temperature sensor lower than 3,1 V for more than 0,3 s
Downgrade Modes whilst Fault is active:	Deactivation of the programming between the turbo pressure and the inlet pressure The turbo pressure takes on as an emergency value the atmospheric pressure, reduced by 600 mbars if the engine is running (otherwise fixed at 0 mbar) Deactivation of the turbocharger regulation (Turbocharger regulation electrovalve forced wide open ; Dump valve forced shut) Reduction of load applied to revert to the behaviour of a naturally-aspirated engine (The maximum load is limited by the mapping : 110% to 2000 rpm ; 40% to 6500 rpm)
Symptoms:	Lack of power Flat spot on acceleration Emission outside the norm
Suspect Areas:	Turbocharging pressure sensor Electrical harness

Bosch MED 17.4.2 Branch 2

Fault Code:	P0238
Description of Fault:	Turbocharging pressure sensor signal: Short-circuit to the battery plus or open circuit. Short circuit to positive on the turbo pressure sensor. Voltage of the turbo pressure sensor higher than 4,9 V or signal from the inlet air temperature sensor greater than 3,1 V for more than 0,3 s. Conditions of activation of the diagnostics: Engine management ECU in main triggering phase
Conditions for Fault to clear:	The following conditions have to be met: - Voltage of the turbo pressure sensor between 0,15 V and 4,9 V - Voltage of the inlet air temperature sensor lower than 3,1 V for more than 0,3 s
Downgrade Modes whilst Fault is active:	Deactivation of the programming between the turbo pressure and the inlet pressure The turbo pressure takes on as an emergency value the atmospheric pressure, reduced by 600 mbars if the engine is running (otherwise fixed at 0 mbar) Deactivation of the turbocharger regulation (Turbocharger regulation electrovalve forced wide open ; Dump valve forced shut) Reduction of load applied to revert to the behaviour of a naturally-aspirated engine
Symptoms:	Lack of power Flat spot on acceleration Emissions outside the norms
Suspect Areas:	Turbocharger boost sensor Electrical harness Engine ECU

[JFK_Kennedy]

Hi Marc,

Thank You So Much for the Help, I Greatly Appreciate it!

I got Hold of The ECU Version, It's 17.4.2.

So If We Start with Error P0238 (Turbocharger/Supercharger Boost Sensor A Circuit High), This Sensor if I Googled Correctly is Located Behind the Battery Box on the 2012 Peugeot 3008 and can Just be Replaced?
Or Maybe It just Needs to be Cleaned? I have see They use Q20 or Thinners, is this correct, can I use that to Clean the Sensor or will it Damage It?

Also can Error P0238 cause Error P3011?

If Not, How do I troubleshoot Error P3011 or Where do I look?

Thank You

[JFK_Kennedy]

Hi,

Now I'm Confused, Does The 2012 Peugeot 3008 1.6 THP Petrol Automatic have a MAF or MAP Sensor or Both?

And where Are They Located?

Thanks

[GiveMeABreak]

Forget codes you find on the internet - they can be totally irrelevant to your vehicle - as in this case. These fault codes have nothing to do with the MAF sensor, which are generally only found on diesels - so no, you don't have a MAF sensor.

You have both an Air Pressure Sensor and an Air Inlet Sensor on this vehicle, but the faults have nothing to do with either of them, so ignore that and focus on the suspect items suggested.

[JFK_Kennedy]

Thank You Very Much, As You can See I got No Idea Where to Start or What Really to Check, I just follow All The Advice I can on Google.

I'm Sorry if I'm a Pain in The Backside, Just Trying to to get to the Bottom of These Errors as it seems to be the Only Thing Stopping the Car From Running.
I have been trying Google and Youtube, but it seems very little on the 3008 prior 2017 is out there.

So on the P3011 and P0238, is there any website I can Go to or Youtube or Article I can use to Troubleshoot and where do I look for the Motorized throttle unit and Turbocharging pressure sensor ?

I already Replaced The Sensor I thought was the MAF, a Bosch 0 261 230 252 12-02-08 3 B05 V7599906 80 01 BUT STILL THE SAME Error.

[GiveMeABreak]

You need to get it to a mechanic to be honest, as replacing parts randomly based on things from the web that may not be relevant is going to be a waste of time and money as you're finding out. Better spent on somebody who can look at these info above who knows what they are doing. Fault codes are only an aid to troubleshooting. They aren't a step by step guide to fix the vehicle, but can give a mechanic a place to start and cut down time, but it will still need investigating by somebody with the correct equipment and expertise to troubleshoot.